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READ THIS MANUAL CAREFULLY!
It contains important safety information.
OWNER'S MANUAL
YFM400FAS
WARNING
This ATV should not be ridden by anyone under 16 years of age.
LIT-11626-17-17
5TE-F8199-11

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Summary of Contents for Yamaha KODIAK 400

  • Page 1 READ THIS MANUAL CAREFULLY! It contains important safety information. OWNER’S MANUAL YFM400FAS WARNING This ATV should not be ridden by anyone under 16 years of age. LIT-11626-17-17 5TE-F8199-11...
  • Page 2 EBU00776...
  • Page 3 Yamaha experience in the production of fine sporting, touring, and pace-setting racing machines. With the purchase of this Yamaha, you can now appreciate the high degree of crafts- manship and reliability that have made Yamaha a leader in these fields.
  • Page 4: Warning

    EBU00801 IMPORTANT MANUAL INFORMATION FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SE- RIOUS INJURY OR DEATH. Particularly important information is distinguished in this manual by the following notations: The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Failure to follow WARNING instructions could result in severe WARNING...
  • Page 5 Please check your local riding laws and regulations before operating this machine. EBU01067 YFM400FAS OWNER’S MANUAL ©2003 by Yamaha Motor Corporation, AFFIX DEALER U.S.A. 1st edition, February 2003 LABEL HERE All rights reserved. Any reprinting or...
  • Page 6: Table Of Contents

    EBU00014 CONTROL FUNCTIONS....4-1 WARNING Main switch ........4-1 Indicates a potential hazard that could Indicator and warning lights .....4-2 result in serious injury or death. Speedometer ........4-4 Fuel gauge ........4-4 Handlebar switches ......4-5 CONTENTS Throttle lever ........4-8 Speed limiter ........4-9 Front brake lever......4-10 LOCATION OF THE WARNING Rear brake pedal and lever ...4-10 AND SPECIFICATION LABELS..
  • Page 7 Rear shock absorber OPERATION ........6-1 adjustment........4-20 Starting a cold engine...... 6-1 Auxiliary DC jack......4-21 Starting a warm engine ....6-3 Warming up ........6-3 PRE-OPERATION CHECKS ... 5-1 Drive select lever operation and Front and rear brakes ..... 5-2 reverse driving .......
  • Page 8 What to do if ......... 7-40 Rear brake shoe inspection...8-39 What to do ........7-40 Brake fluid level check ....8-40 Brake fluid replacement ....8-41 PERIODIC MAINTENANCE AND Front brake lever free play.....8-42 ADJUSTMENT........8-1 Rear brake pedal and lever Owner’s manual and tool kit.... 8-1 adjustment ........8-43 Periodic maintenance/ Adjusting the rear brake light...
  • Page 9 CLEANING AND STORAGE.... 9-1 A. Cleaning........9-1 B. Storage ........9-3 SPECIFICATIONS......10-1 NOISE REGULATION....11-1 MAINTENANCE RECORD .... 12-1 ATV LIMITED WARRANTY.... 13-1 YAMAHA EXTENDED SERVICE (Y.E.S.) ........... 14-1...
  • Page 10: Location Of The Warning And Specification Labels

    EBU00464 LOCATION OF THE WARNING AND SPECIFICATION LABELS...
  • Page 11 Never remove any labels from your ATV. If a label becomes difficult to read or comes off, a replacement label is available from your Yamaha dealer. WARNING Overloading this ATV or carrying cargo improperly can change handling. stability and braking performance and can lead to an accident.
  • Page 12 MAXIMUM . LOADING LIMIT MAXIMUM LOADING LIMIT ( 5 0 0 k g f ) PULLING LOAD: 4900 N 1102 l b f ( 1 5 k g f ) TONGUE WEIGHT: 147 N 33 l b f 5ND-F151K-00 WARNING Overloading this ATV or carrying cargo improperly can change handling.
  • Page 14: Safety Information

    EBU13400 SAFETY INFORMATION AN ATV IS NOT A TOY AND CAN BE HAZARDOUS TO OPERATE. An ATV handles differently from other vehicles including motorcycles and cars. A collision or rollover can occur quickly, even during routine maneuvers such as turning and riding on hills or over obstacles, if you fail to take proper precautions.
  • Page 15 Never operate an ATV without wearing an approved motorcycle helmet that fits properly. You should also wear eye protection (goggles or face shield), gloves, boots, long-sleeved shirt or jacket, and long pants. Never consume alcohol or drugs before or while operating this ATV. Never operate at speeds too fast for your skills or the conditions.
  • Page 16 Always follow proper procedures for climbing hills as described in this manual. Check the ter- rain carefully before you start up any hill. Never climb hills with excessively slippery or loose surfaces. Shift your weight forward. Never open the throttle suddenly. Never go over the top of a hill at high speed.
  • Page 17 Always be careful when skidding or sliding. Learn to safely control skidding or sliding by prac- ticing at low speeds and on level, smooth terrain. On extremely slippery surfaces, such as ice, go slowly and be very cautious in order to reduce the chance of skidding or sliding out of con- trol.
  • Page 18 WARNING When transporting the ATV in another vehicle, be sure it is kept upright and POTENTIAL HAZARD that the fuel cock is in the “OFF” posi- Improper handling of gasoline. tion. Otherwise, fuel may leak out of the WHAT CAN HAPPEN carburetor or fuel tank.
  • Page 19 WARNING POTENTIAL HAZARD Starting or running the engine in a closed area. WHAT CAN HAPPEN Exhaust fumes are poisonous and may cause loss of consciousness and death within a short time. HOW TO AVOID THE HAZARD Always operate your ATV in an area with adequate ventilation.
  • Page 20: Description And Machine Identification

    EBU00032 D ESCRIPTION AND MACHINE IDENTIFICATION 1. Rear shock absorber assembly 14. V-belt cooling duct check hose spring preload adjusting ring 15. Coolant reservoir 2. Spark arrester 16. Oil filter cartridge 3. Storage box and tool kit 17. Engine oil dipstick 4.
  • Page 21: Identification Number Records

    This number can be used for ordering a new when ordering spare parts from a Yamaha key. dealer or for reference in case the vehicle is stolen.
  • Page 22: Vehicle Identification Number

    Record the information on this la- bel in the space provided. This information will be needed to order spare parts from your Yamaha dealer. 1. Vehicle identification number (front left side) NOTE: The vehicle identification number is used to 1.
  • Page 23: Control Functions

    EBU00039 C ONTROL FUNCTIONS WARNING Indicates a potential hazard that could result in serious injury or death. EBU12490 Main switch Functions of the respective switch positions are as follows: 1. Main switch The engine can be started only at this position and the headlights, taillight and meter lighting come on when the light switch is on.
  • Page 24: Indicator And Warning Lights

    “ON”, and then press the start switch. If the light does not come on, have a 1. Coolant temperature warning light “ ” Yamaha dealer inspect the electrical circuit. 2. Reverse indicator light “R” 3. Four-wheel drive indicator light “ ”...
  • Page 25 EBU12500 EBU00605 Reverse indicator light “R” Four-wheel-drive indicator light “ ” This indicator light comes on when the drive This indicator light comes on when the 2WD/ select lever is in the “R” position. 4WD switch is in the 4WD position. NOTE: Due to the synchronizing mechanism in the EBU09720...
  • Page 26: Speedometer

    EBU00447 EBU00052 Speedometer Fuel gauge The speedometer shows riding speed. This The fuel gauge indicates the amount of fuel in speedometer is equipped with a trip odome- the fuel tank. When the needle reaches the ter. The trip odometer can be reset to “0” with red line, refill the tank at the first opportunity.
  • Page 27: Handlebar Switches

    EBU00053 Handlebar switches CAUTION: Do not use the headlights with the engine turned off for more than thirty minutes. The battery may discharge to the point that the starter motor will not operate properly. If this should happen, remove the battery and recharge it. EBU12050 Engine stop switch “...
  • Page 28 EBU00607 Start switch “ ” The starter motor cranks the engine when this switch is pushed. CAUTION: See starting instructions prior to starting the engine. (See page 6-1 for details.) 1. Four-wheel drive switch “2WD/4WD” EBU00060 On command four-wheel drive switch “2WD/4WD”...
  • Page 29 WARNING POTENTIAL HAZARD Changing from 2WD to 4WD or from 4WD to 2WD while the ATV is moving. WHAT CAN HAPPEN The ATV handles differently in 2WD than in 4WD in some circumstances. Changing from 2WD to 4WD or from 4WD to 2WD while moving may cause the ATV to unexpectedly handle differ- ently.
  • Page 30: Throttle Lever

    Check the operation of the throttle lever before you start the engine. If it does not work smoothly, check for the cause. Correct the problem before riding the ATV. Consult a Yamaha dealer if you 1. Throttle lever can’t find or solve the problem yourself.
  • Page 31: Speed Limiter

    EBU01159 Speed limiter WARNING The speed limiter keeps the throttle from fully POTENTIAL HAZARD opening, even when the throttle lever is Improper adjustment of the speed limit- pushed to the maximum. Turning in the ad- er and throttle. justing screw limits the maximum engine pow- WHAT CAN HAPPEN er available and decreases the maximum The throttle cable could be damaged.
  • Page 32: Front Brake Lever

    EBU00070 Front brake lever The front brake lever is located on the right handlebar. Pull it toward the handlebar to ap- ply the front brake. 1. Brake pedal 1. Front brake lever EBU00073 Rear brake pedal and lever The brake pedal is located on the right side of the machine and the brake lever is located on the left handlebar.
  • Page 33: Parking Brake

    EBU00074 Parking brake WARNING Use the parking brake when you have to start POTENTIAL HAZARD the engine or park the machine, especially on Improper use of the parking brake. a slope. Apply the rear brake lever and push WHAT CAN HAPPEN down the lock plate to apply the parking The ATV could start moving unexpect- brake.
  • Page 34: Drive Select Lever

    EBU01106 EBU01107 Drive select lever Recoil starter The drive select lever is used to shift your ma- Firmly grasp the handle and pull slightly until chine into the forward, neutral and reverse po- engagement can be felt. Then pull forcefully, sitions.
  • Page 35: Fuel Tank Cap

    EBU00092 Fuel tank cap WARNING Remove the fuel tank cap by turning it coun- POTENTIAL HAZARD terclockwise. Starting the engine without shifting into the neutral position. WHAT CAN HAPPEN The ATV could start to move unexpect- edly, which could cause an accident. HOW TO AVOID THE HAZARD Shift the drive select lever into the neu- tral position and apply the parking brake...
  • Page 36: Fuel Cock

    EBU00093 Fuel cock OFF Position The fuel cock supplies fuel from the fuel tank to the carburetor. The fuel cock has three positions. OFF: With the lever in this position fuel will not flow. Always turn the lever to this position when the engine is not running.
  • Page 37: Starter (Choke)

    EBU00095 Starter (choke) “ ” RES Position Starting a cold engine requires a richer air-fuel mixture. A separate starter circuit supplies this mixture. Move in direction a to turn on the starter (choke). Move in direction b to turn off the starter (choke).
  • Page 38: Seat

    EBU05670 Seat To install the seat, insert the projections on To remove the seat, pull the seat lock lever the front of the seat into the seat holders and upward and pull up the seat at the rear. push down on the seat at the rear. NOTE: Make sure that the seat is securely fitted.
  • Page 39: Storage Box

    EBU00581 EBU00582 Storage box Front carrier Maximum load limit: 2 kg (4.4 lb) Maximum load limit: 40 kg (88 lb) CAUTION: EBU00583 To protect from damage, do not put metal Rear carrier products, like tools or sharply edged prod- ucts directly in the storage box. If they Maximum load limit: 80 kg (176 lb) must be stored, wrap them in appropriate cushion material.
  • Page 40: Front Shock Absorber Adjustment

    Front shock absorber adjustment A special wrench can be obtained at a The spring preload can be adjusted to suit the Yamaha dealer to make this adjustment. rider’s weight and riding conditions. Adjust the spring preload as follows. Standard position: 2 To increase the spring preload, turn the ad- justing ring in direction a.
  • Page 41 WARNING POTENTIAL HAZARD Improper shock absorber adjustment. WHAT CAN HAPPEN Uneven adjustment can cause poor handling and loss of stability, which could lead to an accident. HOW TO AVOID THE HAZARD Always adjust the shock absorbers on the left and right side to the same set- ting.
  • Page 42: Rear Shock Absorber Adjustment

    Rear shock absorber adjustment A special wrench can be obtained at a The spring preload can be adjusted to suit the Yamaha dealer to make this adjustment. rider’s weight and riding conditions. Adjust the spring preload as follows: Standard position: 2 To increase the spring preload, turn the ad- justing ring in direction a.
  • Page 43: Auxiliary Dc Jack

    EBU10020 Auxiliary DC jack Maximum rated capacity for the auxiliary The auxiliary DC jack is located at the front DC jack: right side of the ATV. The auxiliary DC jack DC 12 V, 120 W (10 A) can be used for suitable work lights, radios, etc.
  • Page 44 1. Auxiliary DC jack EBU00112 WARNING Indicates a potential hazard that could result in serious injury or death. 4-22...
  • Page 45: Pre-Operation Checks

    P RE-OPERATION CHECKS Before using this machine, check the following points: ITEM ROUTINE PAGE • Check operation, free play, fluid level and fluid leakage. 5-2–5-3, Front brake • Fill with DOT 4 brake fluid if necessary. 8-39–8-42 • Check operation, condition and free play. 5-2–5-3, Rear brake •...
  • Page 46: Front And Rear Brakes

    Always inspect your ATV each time you firm feeling when the brake is applied. If not, use it to make sure the ATV is in safe op- have a Yamaha dealer inspect them. erating condition. Always follow the inspection and main-...
  • Page 47 Yamaha dealer check for for wear. (See page 8-39.) the cause.
  • Page 48: Fuel

    EBU01085 Fuel Your Yamaha engine has been designed to Make sure there is sufficient gasoline in the use regular unleaded gasoline with a pump tank. octane number ([R+M]/2) of 86 or higher, or research octane number of 91 or higher. If...
  • Page 49 Fuel can spill, which can cause a fire hol containing methanol is not recommended and severe injury. Fuel expands when it by Yamaha because it may cause fuel system heats up. If the fuel tank is overfilled, damage or vehicle performance problems.
  • Page 50: Engine Oil

    EBU10841 EBU00493 Engine oil Final gear oil Make sure the engine oil is at the specified Make sure the final gear oil is at the specified level. Add oil as necessary. (See page 8-13.) level. Add oil as necessary. (See pages 8-18– 8-20 for details.) CAUTION: Recommended oil:...
  • Page 51: Differential Gear Oil

    EBU00678 Differential gear oil Make sure the differential gear oil is at the specified level. Add oil as necessary. (See pages 8-21–8-22 for details.) Recommended oil: SAE 80 API GL-4 Hypoid gear oil...
  • Page 52: Coolant

    EBU12530 Coolant WARNING Check the coolant level in the coolant reser- POTENTIAL HAZARD voir when the engine is cold. (The coolant lev- Removing the radiator cap when the en- el will vary with engine temperature.) The gine and radiator are still hot. coolant level is satisfactory if it is between the WHAT CAN HAPPEN minimum and maximum level marks on the...
  • Page 53: Throttle Lever

    EBU11620 Fittings and fasteners Always check the tightness of chassis fittings and fasteners before a ride. Take the machine to a Yamaha dealer or refer to the Service Manual for correct tightening torque. EBU10030 Lights Check the headlights and tail/brake light to make sure they are in working condition.
  • Page 54: Tires

    The following are minimums: 1. The tires listed below have been ap- Front 22 kPa (0.22 kgf/cm , 3.2 psi) proved by Yamaha Motor Co., Ltd. Rear 22 kPa (0.22 kgf/cm , 3.2 psi) for this model. Other tire combina- tions are not recommended.
  • Page 55 4. Use no more than the following pressures when seating the tire beads. Front 250 kPa (2.5 kgf/cm , 36 psi) Rear 250 kPa (2.5 kgf/cm , 36 psi) Higher pressures may cause the tire to burst. Inflate the tires very slowly and carefully.
  • Page 56: How To Measure Tire Pressure

    EBU00159 How to measure tire pressure Use the low-pressure tire gauge. NOTE: The low-pressure tire gauge is included as standard equipment. Make two measure- ments of the tire pressure and use the second reading. Dust or dirt in the gauge could cause the first reading to be incorrect.
  • Page 57: Tire Wear Limit

    EBU00160 Tire wear limit When the tire groove decreases to 3 mm (0.12 in) due to wear, replace the tire. a. Tire wear limit 5-13...
  • Page 58: Operation

    2. Turn the fuel cock to “ON”. there is a control or function you do not 3. Turn the main switch to “ON” and the en- understand, ask your Yamaha dealer. gine stop switch to “ ”. 4. Shift the drive select lever into the neutral...
  • Page 59 If it does not come on, ask a Yamaha dealer to inspect the electric circuit. 5. Use the starter (choke) in reference to the figure: Position 1: Cold engine start- ambient temperature below 5 °C...
  • Page 60: Starting A Warm Engine

    NOTE: CAUTION: If the engine fails to start, release the See the “Engine break-in” section prior to start switch, then push the start switch operating the engine for the first time. again. Pause a few seconds before the next attempt. Each cranking should be as short as possible to preserve battery en- EBU00180 ergy.
  • Page 61: Drive Select Lever Operation And Reverse Driving

    EBU01225 Drive select lever operation and reverse driving CAUTION: Before shifting, you must stop the ma- chine and return the throttle lever to its closed position. Otherwise, the transmis- sion may be damaged. Shifting: forward 1. Bring the machine to a complete stop 1.
  • Page 62 1. Drive select lever should be on. If the light does not come on, 4. Check behind for people or obstacles, ask a Yamaha dealer to inspect the ATV. then release the parking brake. 5. Open the throttle lever gradually and con- tinue to watch to the rear while backing.
  • Page 63 WARNING POTENTIAL HAZARD Improper operation in reverse. WHAT CAN HAPPEN You could hit an obstacle or person be- hind you, resulting in serious injury. HOW TO AVOID THE HAZARD When you shift into reverse, make sure there are no obstacles or people behind you.
  • Page 64: Engine Break-In

    For this reason, we ask that you carefully read build up of heat. If any abnormality is noticed the following material. Because the engine is during this period, consult a Yamaha dealer. brand new, you must not put an excessive 1. 0–10 hours: load on it for the first several hours of running.
  • Page 65: Parking

    EBU00211 2. 10–20 hours: Parking Avoid prolonged operation above 3/4 When parking, stop the engine and shift into throttle. Rev the machine freely but do neutral. Turn the fuel cock to “OFF” and apply not use full throttle at any time. the parking brake.
  • Page 66: Parking On A Slope

    EBU13750 Parking on a slope 1. Bring the machine to a stop by applying the brakes. WARNING 2. Stop the engine. POTENTIAL HAZARD 3. With the rear brake lever and pedal ap- Parking on a hill or other incline. plied, apply the parking brake, and then WHAT CAN HAPPEN slowly release the brake pedal.
  • Page 67: Accessories And Loading

    Choose only accessories designed for your dlebars which could make steering difficult, ATV. Your Yamaha dealer has a variety of an accessory that limits your ability to move genuine Yamaha accessories. Other ac-...
  • Page 68 EBU12460 Loading Do not exceed the maximum tongue Cargo or a trailer can change the stability and weight. You can measure tongue weight handling of an ATV. You must use common with a bathroom scale. Put the tongue of sense and good judgment when carrying car- the loaded trailer on the scale with the go or towing a trailer.
  • Page 69 Ride more slowly than you would without a WARNING load. The more weight you carry, the slow- POTENTIAL HAZARD er you should go. Overloading this ATV or carrying or tow- Allow more braking distance. A heavier ve- ing cargo improperly. hicle takes longer to stop.
  • Page 70 EBU13502 WARNING Indicates a potential hazard that could result in serious injury or death. 6-13...
  • Page 71: Riding Your Atv

    Riding Your...
  • Page 73: Getting To Know Your Atv

    WARNING Indicates a potential hazard that could result in serious injury or death. Owner’s Manual completely and understand GETTING TO KNOW YOUR ATV the operation of the controls. Pay particular This ATV is for recreation and utility use. This attention to the safety information on pages section, Riding your ATV, provides general 2-1–2-6.
  • Page 74: Ride With Care And Good Judgement

    JUDGEMENT Beginning and inexperienced operators should complete the certified training Get training if you are inexperienced. course offered by Yamaha. They should Beginners should get training from a certified then regularly practice the skills learned instructor. in the course and the operating tech- Become familiar with this ATV at slow speeds niques described in this Owner’s Manu-...
  • Page 75 Not recommended for children under 16 years of age. WARNING POTENTIAL HAZARD Failure to follow the age recommenda- tions for this ATV. WHAT CAN HAPPEN Use by children of ATVs that are not rec- ommended for their age can lead to se- vere injury or death of the child.
  • Page 76 This ATV is designed to carry operator and cargo only – passengers prohibited. WARNING POTENTIAL HAZARD Carrying a passenger on this ATV. WHAT CAN HAPPEN Greatly reduces your ability to balance and control this ATV. Could cause an accident, resulting in harm to you and/ or your passenger.
  • Page 77 Apparel Operating without protective clothing WARNING increases your chances of severe injury in the event of an accident. POTENTIAL HAZARD HOW TO AVOID THE HAZARD Operating this ATV without wearing an Always wear an approved motorcycle approved motorcycle helmet, eye pro- helmet that fits properly.
  • Page 78 Do not operate after consuming alcohol or WARNING drugs. POTENTIAL HAZARD Operator’s performance capability is reduced Operating this ATV after consuming al- by the influence of alcohol or drugs. cohol or drugs. WHAT CAN HAPPEN Could seriously affect your judgment. Could cause you to react more slowly.
  • Page 79 Pre-operation checks WARNING Always perform the pre-operation checks list- POTENTIAL HAZARD ed on page 5-1 before riding for safety and Operating this ATV with improper tires, proper care of the ATV. or with improper or uneven tire pres- WARNING sure. POTENTIAL HAZARD WHAT CAN HAPPEN Failure to inspect the ATV before oper-...
  • Page 80 Speed limiter WARNING For riders less experienced with this model, Indicates a potential hazard that could this model is equipped with a speed limiter in result in serious injury or death. the throttle lever housing. The speed limiter keeps the throttle from fully opening, even Do not operate at speeds too fast for your when the throttle lever is pushed to the maxi- skills or the conditions.
  • Page 81 Loading and accessories WARNING Use extra caution when riding the ATV with POTENTIAL HAZARD additional loads, such as accessories or car- Overloading this ATV or carrying or tow- go. The ATV’s handling may be adversely af- ing cargo improperly. fected. Reduce your speed when adding WHAT CAN HAPPEN additional loads.
  • Page 82 During operation WARNING Always keep your feet on the footboards dur- POTENTIAL HAZARD ing operation. Otherwise your feet may con- Removing hands from handlebars or tact the rear wheels. feet from footboards during operation. WHAT CAN HAPPEN Removing even one hand or foot can re- duce your ability to control the ATV or could cause you to lose your balance and fall off of the ATV.
  • Page 83 Avoid wheelies and jumping. You may lose control of the ATV or overturn. WARNING POTENTIAL HAZARD Attempting wheelies, jumps, and other stunts. WHAT CAN HAPPEN Increases the chance of an accident, in- cluding an overturn. HOW TO AVOID THE HAZARD Never attempt stunts, such as wheelies or jumps.
  • Page 84 Never modify this ATV through improp- er installation or use of accessories. All parts and accessories added to this ve- hicle should be genuine Yamaha or equivalent components designed for use on this ATV and should be installed and used according to instructions. If you have questions, consult an autho- rized ATV dealer.
  • Page 85 Exhaust system Do not touch the hot exhaust system. The exhaust system on the ATV is very hot Do not park the ATV in a place where during and following operation. To prevent others might be likely to touch it. burns, avoid touching the exhaust system.
  • Page 86: Be Careful Where You Ride

    BE CAREFUL WHERE YOU RIDE This ATV is designed for off-road use only. Riding on paved surfaces can cause loss of control. WARNING POTENTIAL HAZARD Operating this ATV on paved surfaces. WHAT CAN HAPPEN ATVs are designed for off-road use only. Paved surfaces may seriously affect handling and control of the ATV, and may cause the vehicle to go out of con-...
  • Page 87 Do not ride on any public road, street, or high- way. Riding on public roads can result in collisions with other vehicles. WARNING POTENTIAL HAZARD Operating this ATV on public streets, roads or highways. WHAT CAN HAPPEN You can collide with another vehicle. HOW TO AVOID THE HAZARD Never operate this ATV on any public street, road or highway, even a dirt or...
  • Page 88 Know the terrain where you ride. Ride cau- tiously in unfamiliar areas. Stay alert for holes, rocks, or roots in the terrain, and oth- er hidden hazards which may cause the ATV to upset. WARNING POTENTIAL HAZARD Failure to use extra care when operating this ATV on unfamiliar terrain.
  • Page 89 WARNING POTENTIAL HAZARD Failure to use extra care when operating on excessively rough, slippery or loose terrain. WHAT CAN HAPPEN Could cause loss of traction or vehicle control, which could result in an acci- dent, including an overturn. HOW TO AVOID THE HAZARD Do not operate on excessively rough, slippery or loose terrain until you have learned and practiced the skills neces-...
  • Page 90 When riding in an area where you might not WHAT CAN HAPPEN easily be seen, such as desert terrain, mount You could be in a collision. You could a caution flag on the ATV. DO NOT use the be injured. flag pole bracket as a trailer hitch.
  • Page 91 Select a large, flat area off-road to become fa- With the engine idling, return the starter miliar with your ATV. Make sure that this area (choke) to the closed position, shift the drive is free of obstacles and other riders. You select lever into the forward position, and then should practice control of the throttle, brakes, release the parking brake.
  • Page 92: Turning Your Atv

    TURNING YOUR ATV HOW TO AVOID THE HAZARD To achieve maximum traction while riding off- Always follow proper procedures for road, the two rear wheels are mounted solidly turning as described in this Owner’s on one axle and turn together at the same Manual.
  • Page 93 Once you have learned this technique you should be able to perform it at higher speeds or in tighter curves. Improper riding procedures such as abrupt throttle changes, excessive braking, incorrect body movements, or too much speed for the sharpness of the turn may cause the ATV to tip.
  • Page 94: Climbing Uphill

    CLIMBING UPHILL HOW TO AVOID THE HAZARD Use proper riding techniques to avoid vehicle Never operate the ATV on hills too steep overturns on hills. Be sure that you can ma- for the ATV or for your abilities. Practice neuver your ATV well on flat ground before at- on smaller hills before attempting large tempting any incline and then practice riding hills.
  • Page 95 WARNING An obstacle, a sharp drop, or another vehicle or person could be on the other POTENTIAL HAZARD side of the hill. Climbing hills improperly. WHAT CAN HAPPEN Could cause loss of control or cause the ATV to overturn. HOW TO AVOID THE HAZARD Always follow proper procedures for climbing hills as described in this Own- er’s Manual.
  • Page 96 If you are climbing a hill and you find that you WARNING have not properly judged your ability to make POTENTIAL HAZARD it to the top, you should turn the ATV around Improperly crossing hills or turning on while you still have forward motion (provided hills.
  • Page 97 When crossing the side of a hill: Always follow proper procedures as de- scribed in the Owner’s Manual. Avoid hills with excessively slippery or loose surfaces. Shift your weight to the uphill side of the ATV. 7-27...
  • Page 98 If your ATV has stalled or stopped and you and rear brakes gradually, or dismount the believe you can continue up the hill, restart ATV immediately on the uphill side. carefully to make sure you do not lift the front WARNING wheels which could cause you to lose control.
  • Page 99 If you begin rolling backwards: Keep weight uphill. 2WD: Never apply the rear brake while rolling backwards. Apply the front brake. When fully stopped, ap- ply the rear brake as well, and then lock the parking brake. 4WD: Apply both front and rear brakes gradually.
  • Page 100: Riding Downhill

    RIDING DOWNHILL When this ATV is in 4WD, all wheels (front When riding your ATV downhill, shift your and rear) are interconnected by the drive weight as far to the rear and uphill side of the train. This means that applying either the front ATV as possible.
  • Page 101 WARNING POTENTIAL HAZARD Going down a hill improperly. WHAT CAN HAPPEN Could cause loss of control or cause the ATV to overturn. Always follow proper procedures for go- ing down hills as described in this Own- er’s Manual. Note: a special technique is required when braking as you go down a hill.
  • Page 102: Crossing A Slope

    CROSSING A SLOPE WARNING Traversing a sloping surface on your ATV re- POTENTIAL HAZARD quires you to properly position your weight to Improperly crossing hills or turning on maintain proper balance. Be sure that you hills. have learned the basic riding skills on flat WHAT CAN HAPPEN ground before attempting to cross a sloping Could cause loss of control or cause the...
  • Page 103 7-33...
  • Page 104: Crossing Through Shallow Water

    CROSSING THROUGH SHALLOW WATER Remember that wet brakes may have re- The ATV can be used to cross slow moving, duced stopping ability. Test your brakes shallow water of up to a maximum of 35 cm after leaving water. If necessary, apply (14 inches) in depth.
  • Page 105 Test your brakes after leaving the water. Do CAUTION: not continue to ride your ATV without verifying After riding your ATV in water, be sure to that you have regained proper braking ability. drain the trapped water by removing the check hose at the bottom of the air filter case, the V-belt cooling duct check hose and the drive select lever box check hose.
  • Page 106 1. V-belt cooling duct check hose (left front side of ATV) 1. V-belt case drain plug 1. Drive select lever box check hose 7-36...
  • Page 107: Riding Over Rough Terrain

    RIDING OVER ROUGH TERRAIN WARNING Riding over rough terrain should be done with POTENTIAL HAZARD caution. Look out for obstacles which could Improperly operating over obstacles. cause damage to the ATV or could lead to an WHAT CAN HAPPEN upset or accident. Be sure to keep your feet Could cause loss of control or a colli- firmly mounted on the footboards at all times.
  • Page 108: Sliding And Skidding

    SLIDING AND SKIDDING If the rear wheels of your ATV start to slide Care should be used when riding on loose or sideways, control can usually be regained (if slippery surfaces since the ATV may slide. If there is room to do so) by steering in the direc- unexpected and uncorrected, sliding could tion of the slide.
  • Page 109 With practice, over a period of time, skill at WARNING controlled sliding can be developed. The ter- POTENTIAL HAZARD rain should be chosen carefully before at- Skidding or sliding improperly. tempting such maneuvers, since both stability WHAT CAN HAPPEN and control are reduced. Bear in mind that You may lose control of this ATV.
  • Page 110: What To Do If

    WHAT TO DO IF ... If your ATV starts to slide sideways: This section is designed to be a reference Steer in the direction of the slide if you have guide only. Be sure to read each section on the room. Applying the brakes or accelerat- riding techniques completely.
  • Page 111 If your ATV is traversing a sloping surface: Be sure to ride with your weight positioned towards the uphill side of the ATV to main- tain proper balance. If the ATV starts to tip, steer down the hill (if there are no obstacles in your way) to regain balance.
  • Page 112: Periodic Maintenance And Adjustment

    EBU00515 P ERIODIC MAINTENANCE AND Have a Yamaha dealer perform service if ADJUSTMENT you are not familiar with machine ser- vice. Periodic inspection, adjustment and lubrica- tion will keep your machine in the safest and EBU12990 most efficient condition possible. Safety is an Owner’s manual and tool kit...
  • Page 113 Yamaha or your machine to a Yamaha dealer to check equivalent components designed for the torque settings and adjust them as neces- use on this ATV and should be installed sary.
  • Page 114: Periodic Maintenance/Lubrication

    EBU00261 PERIODIC MAINTENANCE/LUBRICATION INITIAL EVERY ITEM ROUTINE month months months months year • Check valve clearance. Valves* • Adjust if necessary. • Check coolant leakage. Cooling system • Repair if necessary. • Replace coolant every 24 months. • Check condition. Spark plug •...
  • Page 115 • Correct if necessary. • Check operation. Lights and switches* • Adjust headlight beams. * Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service. NOTE: Recommended brake fluid: DOT 4 Brake fluid replacement: •...
  • Page 116: Panel Removal And Installation

    EBU00614 Panel removal and installation The panels illustrated need to be removed to perform some of the maintenance described in this chapter. Refer to this section each time a panel has to be removed or reinstalled. 1. Panel C 2. Panel D 3.
  • Page 117 EBU00700 Panel A, D To remove 1. Remove the seat. 2. Pull outward on the areas shown, and then pull upward.
  • Page 118 To install 1. Place the panel in its original position. 2. Install the seat.
  • Page 119 EBU01147 Panel B To remove Remove the bolt, and then take the panel off. To install Place the panel in the original position and in- stall the bolt. CAUTION: When installing the panel, be sure not to pinch the cables or wires. 1.
  • Page 120 EBU06171 Panel C To remove 1. Remove the front carrier by removing the carrier bolts. 1. Bolt (× 2) (under fenders) 1. Carrier bolt (× 4) 2. Remove the bolts at the bottom of the fenders.
  • Page 121 3. Remove the quick fasteners and pull up- To install ward. 1. Place the panel in the original position and install the quick fasteners. 2. Install the bolts at the bottom of the fend- ers. 3. Install the front carrier by installing the carrier bolts, and then tighten them to the specified torque.
  • Page 122 EBU01013 EBU00638 Panel E Panel F To remove To remove Remove the bolts, and then take the panel off. Pull outward on the areas shown. To install Place the panel in the original position, and then install the bolts. 1. Panel F 1.
  • Page 123 To install Place the panel in its original position. 8-12...
  • Page 124: Engine Oil And Oil Filter Cartridge

    EBU10991 Engine oil and oil filter cartridge 5. Remove the engine oil filler cap and wipe The engine oil level should be checked before off the dipstick with a clean rag. each ride. In addition, the oil must be changed and the oil filter cartridge replaced at the inter- vals specified in the periodic maintenance and lubrication chart.
  • Page 125 6. Insert the dipstick in the oil filler hole 8. Insert the dipstick into the oil filler hole, (without screwing it in), and then remove and then tighten the oil filler cap. it again to check the oil level. 9. Install the panel. NOTE: The engine oil should be between the mini- mum and maximum level marks.
  • Page 126 To change the engine oil (with or without NOTE: oil filter cartridge replacement) Skip steps 5–9 if the oil filter cartridge is not 1. Remove panel F. (See page 8-11 for being replaced. panel removal and installation proce- 5. Remove panel E. (See page 8-11 for dures.) panel removal and installation proce- 2.
  • Page 127 1. Oil filter wrench 1. O-ring NOTE: An oil filter wrench is available at a nearby Yamaha dealer. 7. Apply a light coat of engine oil to the O-ring of the new oil filter cartridge. NOTE: Make sure the O-ring is seated properly.
  • Page 128 8. Install the new oil filter cartridge with an 10. Install the engine oil drain bolt, and then oil filter wrench, and then tighten it to the tighten it to the specified torque. specified torque with a torque wrench. Tightening torque: Engine oil drain bolt: 23 Nm (2.3 m·kgf, 16 ft·lbf) 11.
  • Page 129: Final Gear Oil

    EBU01145 Final gear oil CAUTION: Final gear oil measurement In order to prevent clutch slippage 1. Place the machine on a level surface. (since the engine oil also lubricates 2. Remove the oil filler bolt, and then check the clutch), do not mix any chemical the oil level in the final gear case.
  • Page 130 3. If the oil is below the brim of the filler hole, Final gear oil replacement add sufficient oil of the recommended 1. Remove the final gear case cover by re- type to raise it to the correct level. moving the bolts. CAUTION: Be sure no foreign material enters the final gear case.
  • Page 131 Recommended oil: See page 10-3. Oil quantity: 0.23 L (0.20 Imp qt, 0.24 US qt) CAUTION: Be sure no foreign material enters the final gear case. 1. Final gear oil drain bolt 7. Install the oil filler bolt. 5. Install the drain bolt, and then tighten it to 8.
  • Page 132: Differential Gear Oil Replacement

    EBU01241 Differential gear oil replacement 1. Place the machine on a level surface. 2. Place a container under the differential gear case to catch the oil. 3. Remove the oil filler bolt and oil drain bolt to drain the oil. 1.
  • Page 133 5. Fill the differential gear case with the CAUTION: specified amount of the recommended Be sure no foreign material enters the dif- oil. ferential gear case. NOTE: 6. Install the oil filler bolt. Do not exceed the specified differential 7. Check for oil leakage. If oil leakage is gear oil quantity when filling.
  • Page 134: Cooling System

    3. If the coolant is at or below the minimum EBU12560 Cooling system level mark, remove panel D (See page 1. Place the ATV on a level surface. 8-6 for panel removal and installation 2. Check the coolant level in the coolant procedures.), remove the reservoir cap, reservoir when the engine is cold as the add coolant to the maximum level mark,...
  • Page 135: Changing The Coolant

    Removing the radiator cap when the en- gine and radiator are still hot. NOTE: WHAT CAN HAPPEN If water is added, have a Yamaha dealer You could be burned by hot fluid and check the antifreeze content of the cool- steam blown out under pressure.
  • Page 136 1. Place the ATV on a level surface. 2. Remove panels E and F. (See page 8-11 for panel removal and installation proce- dures.) 3. Place a container under the engine, and then remove the coolant drain bolt. (Use a trough or a similar object as shown to prevent coolant from spilling on the foot- rest.) 1.
  • Page 137 1. Radiator cap 1. Coolant reservoir hose 5. Remove the radiator cap. 9. After draining the coolant, thoroughly 6. Remove the panel D. (See pages 8-6– flush the cooling system with clean tap 8-7 for panel removal and installation water. procedures.) 10.
  • Page 138 15. Check for coolant leakage. containing corrosion inhibitors for NOTE: aluminum engines. If any leakage is found, have a Yamaha deal- Antifreeze and water mixing ratio: er check the cooling system. Total amount: 16. Install the panels and the front carrier.
  • Page 139: Axle Boots

    Check the protective boots for holes or tears. If any damage is found, have them replaced 1. Remove panel A. (See pages 8-6–8-7 for by a Yamaha dealer. panel removal and installation proce- dures.) 2. Remove the spark plug cap.
  • Page 140 Instead, take the ATV to a Yamaha dealer. You should periodically remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode. If electrode erosion becomes ex- cessive, or if carbon and other deposits are excessive, you should replace the spark plug with the specified plug.
  • Page 141 NOTE: If a torque wrench is not available when you are installing a spark plug, a good estimate of the correct torque is 1/4 to 1/2 turn past finger tight. Have the spark plug tightened to the specified torque as soon as possible. 4.
  • Page 142: Air Filter Element Cleaning

    EBU11331 Air filter element cleaning NOTE: There is a check hose at the bottom of the air filter case. If dust or water collects in this hose, empty the hose and clean the air filter element and air filter case. 1.
  • Page 143 WARNING POTENTIAL HAZARD Using low flash point solvents or gaso- line to clean the air filter element. WHAT CAN HAPPEN Low flash point solvents or gasoline can catch fire or explode. HOW TO AVOID THE HAZARD Use parts cleaning solvent to clean the 1.
  • Page 144 NOTE: 7. Apply Yamaha foam air filter oil or other The air filter element should be cleaned every quality foam air filter oil to the air filter el- 20–40 hours. It should be cleaned and lubri- ement. If foam air filter oil is not available, cated more often if the machine is operated in engine oil may be used.
  • Page 145 NOTE: If water drains from the V-belt case after re- moving the plug, have a Yamaha dealer in- spect the ATV as the water may affect other engine parts. 1. V-belt cooling duct check hose (Left front side of ATV) 1.
  • Page 146: Spark Arrester Cleaning

    EBU01066 Spark arrester cleaning Be sure the exhaust pipe and muffler are cool before cleaning the spark arrester. 1. Remove the bolts. 2. Remove the tailpipe by pulling it out of the muffler. 1. Spark arrester 4. Insert the tailpipe into the muffler and align the bolt holes.
  • Page 147: Carburetor Adjustment

    The carburetor is a vital part of the engine and POTENTIAL HAZARD requires very sophisticated adjustment. Most Improper cleaning of the spark arrester. adjusting should be left to a Yamaha dealer Hot exhaust system who has the professional knowledge and ex- WHAT CAN HAPPEN perience to do so.
  • Page 148: Idle Speed Adjustment

    To prevent this, the valve clear- increase the engine speed, and in direc- ance must be adjusted regularly. This adjust- tion b to decrease the engine speed. ment however, should be left to a professional Yamaha service technician. Specified idle speed: 1,450–1,550 r/min 8-37...
  • Page 149: Throttle Lever Adjustment

    EBU00307 Throttle lever adjustment NOTE: Adjust the engine idling speed before adjust- ing the throttle lever free play. 1. Loosen the locknut. 2. Turn the adjusting bolt until the throttle le- ver free play is 3–5 mm (0.12–0.20 in). 3. Tighten the locknut. a.
  • Page 150: Front Brake Pad Check

    Apply pads as a set. the rear brake and check the position of the in- dicator. If the indicator reaches the wear limit line, ask a Yamaha dealer to replace shoes as a set. a. Brake pad thickness NOTE: The wheels need to be removed to check the brake pads.
  • Page 151: Brake Fluid Level Check

    EBU13040 Brake fluid level check Observe these precautions: Insufficient brake fluid may let air enter the When checking the brake fluid level, make brake system, possibly causing the brakes to sure the top of the brake fluid reservoir is become ineffective. level.
  • Page 152: Brake Fluid Replacement

    Complete fluid replacement should be done fluid immediately. only by trained Yamaha service personnel. Have a Yamaha dealer check the cause if Have a Yamaha dealer replace the following the brake fluid level goes down. components during periodic maintenance or when they are damaged or leaking.
  • Page 153: Front Brake Lever Free Play

    The front brake lever should have a free play POTENTIAL HAZARD of zero mm (zero in) at the lever end. If not, Operating with improperly serviced or have a Yamaha dealer check the brake sys- adjusted brakes. tem. WHAT CAN HAPPEN You could lose braking ability, which could lead to an accident.
  • Page 154: Rear Brake Pedal And Lever Adjustment

    EBU01239 Rear brake pedal and lever adjustment 2. Turn the adjusting nut on the brake pedal Brake pedal free play adjustment cable until the free play is 20–30 mm 1. Fully loosen the adjusting nut on the (0.79–1.18 in). brake lever cable at the rear wheel. a.
  • Page 155 Brake lever free play adjustment 2. Turn in the adjusting nut on brake cable 1. Loosen the locknut and fully turn in the to provide a gap of 0–1 mm (0–0.04 in) adjusting bolt at the brake lever. between the brake camshaft lever and the pin.
  • Page 156 Make sure the brakes do not drag. 1. Locknut 2. Adjusting bolt a. Rear brake lever free play Replacement of brake components re- 4. Tighten the locknut. quires professional knowledge. These procedures should be performed by a Yamaha dealer. 8-45...
  • Page 157: Adjusting The Rear Brake Light Switch

    EBU12590 Adjusting the rear brake light switch The rear brake light switch, which is activated by the brake pedal and rear brake lever, is properly adjusted when the brake light comes on just before braking takes effect. If neces- sary, adjust the brake light switch as follows. 1.
  • Page 158: Cable Inspection And Lubrication

    Inspect cables frequently. Replace dam- aged cables. Lubricate the inner cables and the cable ends. If the cables do not operate smoothly, ask a Yamaha dealer to replace them. Recommended lubricant: Yamaha chain and cable lube or SAE 10W30 motor oil 8-47...
  • Page 159: Wheel Removal

    EBU01112 Wheel removal 1. Loosen the wheel nuts. 2. Elevate the ATV and place a suitable stand under the frame. 3. Remove the nuts from the wheel. 4. Remove the wheel. 1. Nut (× 4) 8-48...
  • Page 160: Wheel Installation

    EBU01121 Wheel installation 2. Lower the ATV so that the wheel is on the 1. Install the wheel and the nuts. ground. NOTE: Tapered nuts are used for both the front and rear wheels. Install the nut with its ta- pered side towards the wheel.
  • Page 161: Battery

    Keep out of reach of chil- tery. If the battery seems to have discharged, dren. consult a Yamaha dealer. Antidote: EXTERNAL: Flush with water. CAUTION: INTERNAL: Drink large quantities of wa- Do not try to remove the sealing caps of ter or milk.
  • Page 162: Battery Maintenance

    Then turn on the switches. If CAUTION: the fuse immediately blows again, con- A special battery charger (constant volt- sult a Yamaha dealer. age/ampere or constant voltage) is re- quired recharging sealed-type battery.
  • Page 163 1. Main fuse 2. Spare main fuse 1. Headlight fuse 2. Ignition fuse 3. Auxiliary DC jack fuse 4. Four-wheel drive fuse 5. Signaling system fuse 6. Spare fuse (× 3) Specified fuses: Main fuse: 30 A Headlight fuse: 15 A Ignition fuse: 10 A Auxiliary DC jack fuse:...
  • Page 164: Replacing A Headlight Bulb

    EBU12610 Replacing a headlight bulb WARNING If a headlight bulb burns out, replace it as fol- POTENTIAL HAZARD lows. Using an improper fuse. 1. Remove the bulb holder cover at the rear WHAT CAN HAPPEN of the headlight by pulling it off. An improper fuse can cause damage to the electrical system which could lead to a fire.
  • Page 165 WARNING POTENTIAL HAZARD A headlight bulb is hot when it is on and immediately after it is turned off. WHAT CAN HAPPEN You can be burned, or a fire could start if the bulb touches something flamma- ble. HOW TO AVOID THE HAZARD 1.
  • Page 166 5. Install the bulb holder by turning it clock- wise. 6. Install the bulb holder cover at the rear of the headlight. 1. Do not touch the glass part of the bulb. CAUTION: Do not touch the glass part of the head- light bulb to keep it free from oil, otherwise the transparency of the glass, the luminos- ity of the bulb, and the bulb life will be ad-...
  • Page 167: Headlight Beam Adjustment

    Tail/brake light bulb replacement If the tail/brake light bulb burns out, have a CAUTION: Yamaha dealer replace it. It is advisable to have a Yamaha dealer make this adjustment. To raise the beam, turn the adjusting screw in direction a.
  • Page 168: Troubleshooting

    EBU00412 Troubleshooting WARNING Although Yamaha machines receive a rigid in- POTENTIAL HAZARD spection before shipment from the factory, Checking the fuel system while smok- trouble may occur during operation. Any prob- ing or near an open flame. lem in the fuel, compression, or ignition sys-...
  • Page 169: Troubleshooting Charts

    No fuel. 2. Compression There is compression. Compression normal. Use the electric starter to see if there is compression. Ask a Yamaha dealer to No compression. inspect. 3. Ignition Wipe clean with dry cloth. Ignition system is Spark is good.
  • Page 170 Restart the engine. If the engine overheats again, ask a Level is OK. Yamaha dealer to inspect and/or repair the cooling system. NOTE: If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is changed to the recommended coolant as soon as possible.
  • Page 171: Cleaning And Storage

    EBU00419 C LEANING AND STORAGE CAUTION: Excessive water pressure may cause wa- A. CLEANING ter seepage and deterioration of wheel Frequent, thorough cleaning of your machine bearings, brakes, transmission seals and will not only enhance its appearance but will electrical devices. Many expensive repair improve its general performance and extend bills have resulted from improper high the useful life of many components.
  • Page 172 6. Clean the seat with a vinyl upholstery WARNING cleaner to keep the cover pliable and POTENTIAL HAZARD glossy. Operation with wet brakes after wash- 7. Automotive type wax may be applied to ing. all painted and chrome plated surfaces. WHAT CAN HAPPEN Avoid combination cleaner-waxes.
  • Page 173: Storage

    Do not apply oil to fuel) any rubber parts or the seat cover. NOTE: Use of fuel stabilizer and conditioner elimi- nates the need to drain the fuel system. Con- sult a Yamaha dealer if the fuel system needs to be drained instead.
  • Page 174 7. Remove the battery and charge it. Store it in a dry place and recharge it once a month. Do not store the battery in an ex- cessively warm or cold place (less than 0 °C (30 °F) or more than 30 °C (90 °F)). NOTE: Make any necessary repairs before storing the machine.
  • Page 175: Specifications

    EBU00428 S PECIFICATIONS Model YFM400FA Dimensions: Overall length 1,984 mm (78.1 in) Overall width 1,085 mm (42.7 in) Overall height 1,120 mm (44.1 in) Seat height 827 mm (32.6 in) Wheelbase 1,233 mm (48.5 in) Minimum ground clearance 245 mm (9.65 in) Minimum turning radius 3,000 mm (118.1 in) Basic weight:...
  • Page 176 Model YFM400FA Engine oil: Type 0˚ 10˚ 30˚ 70˚ 90˚ 110˚ 130˚F 50˚ YAMALUBE 4 (20W40) or SAE 20W40 YAMALUBE 4 (10W30) or SAE 10W30 SAE 5W30 -20˚ -10˚ 0˚ 20˚ 30˚ 40˚ 50˚C 10˚ Recommended engine oil classification: API Service SE, SF, SG type or higher CAUTION: In order to prevent clutch slippage (since the en- gine oil also lubricates the clutch), do not mix any...
  • Page 177 Model YFM400FA Final gear case oil: Type SAE80 API GL-4 Hypoid gear oil Quantity: Periodic oil change 0.23 L (0.20 Imp qt, 0.24 US qt) Differential gear case oil: Type SAE80 API GL-4 Hypoid gear oil Quantity: Periodic oil change 0.35 L (0.31 Imp qt, 0.37 US qt) Radiator capacity (including all routes): 1.3 L (1.14 Imp qt, 1.37 US qt)
  • Page 178 Model YFM400FA Spark plug: Type/manufacturer DR8EA / NGK Spark plug gap 0.6–0.7 mm (0.02–0.03 in) Clutch type: Wet, centrifugal automatic Transmission: Primary reduction system V-belt Secondary reduction system Spur gear 39/24 × 24/18 × 33/9 (7.944) Secondary reduction ratio Transmission type V-belt automatic Operation Left hand operation...
  • Page 179 Model YFM400FA Brake: Front brake type Dual disc brake operation Right hand operation Rear brake type Drum brake operation Left hand and right foot operation Suspension: Front suspension Double wishbone Rear suspension Swingarm (monocross) Shock absorber: Front shock absorber Coil spring / oil damper Rear shock absorber Coil spring / oil damper Wheel travel:...
  • Page 180 Model YFM400FA Bulb voltage, wattage × quantity: 12 V, 30/30 W × 2 Headlight 12 V, 5/21 W × 1 Tail/brake light 14 V, 3 W × 1 Meter lighting 12 V, 1.7 W × 1 Neutral indicator light 12 V, 1.7 W × 1 Reverse indicator light 12 V, 1.7 W ×...
  • Page 181: Noise Regulation

    EBU00430 NOISE REGULATION TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED: Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering inop- erative by any person other than for purposes of maintenance, repair, or replacement of any de- vice or element of design incorporated into any new vehicle for the purpose of noise control prior to its sale or delivery to the ultimate purchaser or while it is in use or (2) the use of the vehicle after such device or element of design has been removed or rendered inoperative by any person.
  • Page 182: Maintenance Record

    EBU13651 M AINTENANCE RECORD Copies of work orders and/or receipts for parts you purchase and install will be required to docu- ment maintenance done in accordance with the warranty. The chart below is printed only as a re- minder to you that the maintenance work is required. It is not acceptable proof of maintenance work.
  • Page 183: Atv Limited Warranty

    EBU00432 YAMAHA MOTOR CORPORATION, U.S.A. ATV LIMITED WARRANTY 13-1...
  • Page 184 13-2...
  • Page 185: Yamaha Extended Service (Y.e.s.)

    EBU00435 YAMAHA EXTENDED SERVICE (Y.E.S.) 14-1...
  • Page 186 EBU00436 WARNING Indicates a potential hazard that could result in serious injury or death. 14-2...
  • Page 187 EBU00437...
  • Page 188 LOCATE AND READ OWNER’S MANUAL. FOLLOW ALL INSTRUCTIONS AND WARNINGS. (For replacement manual, call 1-800-532-1558) YAMAHA MOTOR CO., LTD. PRINTED ON RECYCLED PAPER PRINTED IN USA 2003.04-3.9×1 CR...

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