Page 1 READ THIS MANUAL CAREFULLY! It contains important safety information. LIRE ATTENTIVEMENT CE MANUEL! Il comprend d’importantes informations de sécurité. ¡LEA ESTE MANUAL ATENTAMENTE! Contiene indicaciones importantes acerca de la seguridad. OWNER’S MANUAL MANUEL DU PROPRIÉTAIRE MANUAL DEL PROPIETARIO YFM25RA/YFM25RSEA YFM250RA/YFM250RSEA 1BT-28199-61...
Page 2 YAMAHA MOTOR CO., LTD. PRINTED ON RECYCLED PAPER PRINTED IN JAPAN IMPRIMÉ SUR PAPIER RECYCLÉ 2010.04-0.8×1 CR IMPRESO EN PAPEL RECICLADO (E,F,S)
Page 3 READ THIS MANUAL CAREFULLY! It contains important safety information. OWNER’S MANUAL YFM25RA/YFM25RSEA YFM250RA/YFM250RSEA 1BT-28199-61-E0...
Page 4 Read this manual carefully before operating this vehicle. This manual should stay with this ve- hicle if it is sold. EC Declaration of Conformity conforming to Directive 2006/42/EC We, YAMAHA MOTOR CO., LTD. 2500 Shingai, Iwata, Japan, declare in sole responsibility, that the product YFM250R (YFM25R) (JY4AG03W0A0006915–)
Page 5 Congratulations on your purchase of the Yamaha YFM25RA/YFM25RSEA/YFM250RA/YFM250RSEA. This ATV represents the result of many years of Yamaha experience in the production of fine sporting, tour- ing, and pacesetting racing machines. With the purchase of this Yamaha, you can now appreciate the high degree of craftsmanship and reliability that have made Yamaha a leader in these fields.
Page 6 EBU17330 IMPORTANT MANUAL INFORMATION EBU17342 FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS IN- JURY OR DEATH. Particularly important information is distinguished in this manual by the following notations: This is the safety alert symbol. It is used to alert you to potential per- sonal injury hazards.
Page 7 Please check your local riding laws and regulations before operating this ATV. EBU17390 YFM25RA/YFM25RSEA YFM250RA/YFM250RSEA OWNER’S MANUAL ©2010 by Yamaha Motor Co., Ltd. 1st edition, March 2010 All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Co., Ltd.
Page 8: Table Of Contents
(YFM25RSEA/YFM250RSEA)....4-20 Throttle lever ..........4-3 Speed limiter ..........4-4 PRE-OPERATION CHECKS ......5-1 Clutch lever ..........4-4 Fuel .............5-3 Brake lever (YFM25RA/YFM250RA) ..4-5 Engine oil ............5-3 Brake lever Front and rear brakes .........5-3 (YFM25RSEA/YFM250RSEA) ....4-5 Throttle lever ..........5-3 Brake pedal ..........4-6 Drive chain ..........5-4...
Page 9 Instruments, lights and switches ....5-6 PERIODIC MAINTENANCE AND ADJUSTMENT..........8-1 OPERATION ..........6-1 Owner’s manual and tool kit .......8-2 Starting a cold engine ........ 6-1 Periodic maintenance chart for the Starting a warm engine ......6-2 emission control system ......8-3 Shifting ............
Page 10 Battery ............8-35 Replacing the fuse ........8-38 Replacing a headlight bulb ....... 8-39 Adjusting a headlight beam ...... 8-41 Replacing the tail/brake light bulb (YFM25RA/YFM250RA)......8-41 Tail/brake light (YFM25RSEA/YFM250RSEA) ....8-42 Removing a wheel ........8-42 Installing a wheel ........8-42 Troubleshooting ........
Page 11: Location Of The Warning And Specification Labels
Read and understand all of the labels on your ATV. These labels contain important information for safe and proper operation. Never remove any labels from your ATV. If a label becomes difficult to read or comes off, request a replace- ment label from your Yamaha dealer. For Europe...
Page 12 4D3-2816L-20 43P-2816P-00 43P-2816R-01...
Page 13 YFM250R 14.0 kW 150 kg 4D3-2156A-10 27.5 kPa 27.5 kPa 0.275 kgf/cm² 0.275 kgf/cm² 4.0 psi 4.0 psi 4D3-2816M-M0 6 YFM25RSEA 2010 YAMAHA MOTOR CO., LTD. 2500 SHINGAI, IWATA, JAPAN 8AC-2817L-00 4AA-22259-40 4AA-22259-40...
Page 14 Familiarize yourself with the following pictograms and read the explanatory text, then make sure to check the pictograms that apply to your model. Read the Owner’s manual. NEVER permit children under age 12 to operate this ATV. Operation of this ATV by children under the age of 12 increases the risk of severe injury or death.
Page 15 NEVER use with drugs or alcohol. Adjust the tire pressure. Improper tire pressure can cause loss of control. Loss of control can result in severe injury or death. **.* kPa **.* kPa *.** kgf/cm² *.** kgf/cm² *.* psi *.* psi NEVER store fuel or flammable liquids.
Page 16 Overloading can cause loss of control. Loss of control can result in severe injury or death. Model Name ****** Max. Power *** kW *** kg Mass In Running Order **** 1 Year of construction YAMAHA MOTOR CO., LTD. 2500 SHINGAI, IWATA, JAPAN...
Page 17 For Oceania...
Page 18 WARNING Improper ATV use can result in SEVERE INJURY or DEATH. ALWAYS USE NEVER USE NEVER CARRY NEVER USE AN APPROVED ON PUBLIC PASSENGERS WITH DRUGS HELMET AND ROADS OR ALCOHOL PROTECTIVE GEAR NEVER operate : • without proper training or instruction. •...
Page 19 5 YFM250RSEA WARNING Improper tire pressure or overloading can cause loss of control. Loss of control can result in severe injury or death. OPERATING TIRE PRESSURE: Set with tires cold • Recommended : Front : 27.5 kPa, 4.0 psi Rear : 27.5 kPa, 4.0 psi •...
Page 20: Safety Information
EBU17431 SAFETY INFORMATION EBU17593 Never carry a passenger on an ATV. Always avoid operating an ATV on any paved AN ATV IS NOT A TOY AND CAN BE HAZARD- surfaces, including sidewalks, driveways, park- OUS TO OPERATE. ing lots and paved streets. An ATV handles differently from other vehicles, in- Never operate an ATV on any paved street, cluding motorcycles and cars.
Page 21 Always inspect your ATV each time you use it to Always follow proper procedures for climbing make sure it is in safe operating condition. Al- hills as described in this manual. Check the ter- ways follow the inspection and maintenance rain carefully before you start up any hill.
Page 22 speed when climbing a hill. If you stall or roll Always use the size and type of tires specified in backwards, follow the special procedure for this manual. braking described in this manual. Dismount on Always maintain proper tire pressure as de- the uphill side or to a side if pointed straight up- scribed in this manual.
Page 23 closed or poorly ventilated areas. If you experi- ence any symptoms of carbon monoxide poisoning, leave the area immediately, get fresh air, and SEEK MEDICAL TREATMENT. Do not run engine indoors. Even if you try to ventilate engine exhaust with fans or open windows and doors, carbon monoxide can rapidly reach dangerous levels.
Page 24: Description
EBU17680 DESCRIPTION EBU17690 EBU17700 Left view Right view 3 4 5 6 7 1. Front shock absorber assembly 1. Spark arrester 2. Spark plug 2. Fuse 3. Fuel cock 3. Battery 4. Starter (choke) 4. Air filter case 5. Throttle stop screw 5.
Page 25: Controls And Instruments
EBU17712 Controls and instruments 1. Clutch lever 2. Handlebar switches 3. Parking brake lever 4. Main switch 5. Front brake fluid reservoir 6. Throttle lever 7. Brake lever The ATV you have purchased may differ slightly from the figures shown in this manual.
Page 26: Instrument And Control Functions
EBU17733 INSTRUMENT AND CONTROL FUNCTIONS EBU17760 Main switch The positions of the main switch are as follows: All electrical systems are supplied with power. The headlights and taillight come on when the light switch is on, and the engine can be started. The key cannot be removed.
Page 27: Indicator Light
EBU17783 EBU18061 Indicator light Handlebar switches 1. Neutral indicator light “N” 1. Light switch “ /OFF” 2. Engine stop switch “ ” EBU17860 3. Start switch “ ” Neutral indicator light “ ” This indicator light comes on when the transmis- EBU18080 sion is in the neutral position.
Page 28: Throttle Lever
EBU18101 Regulate the speed of the ATV by varying the Start switch “ ” throttle position. Because the throttle is spring- Push this switch to crank the engine with the start- loaded, the ATV will decelerate, and the engine will er.
Page 29: Speed Limiter
EBU18323 Speed limiter Your ATV is equipped with an adjustable speed limiter. The speed limiter keeps the throttle from fully opening, even when the throttle lever is pushed to the maximum. 1. Loosen the locknut. 2. To increase the maximum engine power avail- able and the maximum speed of the ATV, turn the adjusting screw in direction (a).
Page 30: Brake Lever (Yfm25Ra/Yfm250Ra)
1. Brake lever 1. Clutch lever EBU18423 EBU18411 Brake lever Brake lever (YFM25RA/YFM250RA) (YFM25RSEA/YFM250RSEA) The brake lever is located at the right handlebar grip. To apply the front brake, pull the brake lever The brake lever is located on the right handlebar.
Page 31: Brake Pedal
1. Brake lever 1. Brake pedal 2. Locknut EBU18520 3. Brake lever position adjusting bolt Parking brake lever 4. Distance between brake lever and handlebar grip Use the parking brake before starting the engine or EBU18432 parking the ATV, especially on a slope. To apply Brake pedal the parking brake, move the parking brake lever in The brake pedal is located on the right side of the...
Page 32: Shift Pedal
EWB00220 WARNING Always set the parking brake before starting the engine. The ATV could start moving un- expectedly if the parking brake is not ap- plied. This could cause loss of control or a collision. Always be sure you have released the park- ing brake before you begin to ride.
Page 33: Fuel Tank Cap
1. Shift pedal 1. Fuel tank cap EBU18720 EBU18754 Fuel tank cap Fuel Remove the fuel tank cap by turning it counter- Make sure there is sufficient gasoline in the tank. clockwise. EWB02521 WARNING Gasoline and gasoline vapors are extremely flammable.
Page 34 of sparks, open flames, or other sources of ig- Recommended fuel: nition such as the pilot lights of water heaters UNLEADED GASOLINE ONLY and clothes dryers. For Europe: Regular unleaded gasoline only 2. Do not overfill the fuel tank. When refueling, with a research octane number of 91 or be sure to insert the pump nozzle into the fuel higher...
Page 35: Fuel Cock
Your Yamaha engine has been designed to use regular unleaded gasoline with a research octane 1. Arrow mark positioned over “OFF”...
Page 36: Starter (Choke)
1. Arrow mark positioned over “ON” 1. Arrow mark positioned over “RES” With the fuel cock lever in this position, fuel flows This indicates reserve. With the fuel cock lever in to the carburetor. Turn the fuel cock lever to this this position, the fuel reserve is made available.
Page 37: Seat
Move the starter (choke) in direction (b) to turn off the starter (choke). See the “Starting a cold engine” section on page 6-1 for proper operation. 1. Seat lock lever To install the seat Insert the projections on the front of the seat into the seat holders and push down on the seat at the 1.
Page 38: Adjusting The Front Shock Absorber Assemblies (Yfm25Ra/Yfm250Ra)
WARNING Always adjust the shock absorber assemblies on the left and right side to the same setting. A special wrench can be obtained at a Yamaha Uneven adjustment can cause poor handling dealer to make this adjustment. and loss of stability, which could lead to an ac- cident.
Page 39: Adjusting The Front Shock Absorber Assemblies (Yfm25Rsea/Yfm250Rsea)
Always adjust the shock absorber assem- Spring preload setting: blies on the left and right side to the same Minimum (soft): setting. Uneven adjustment can cause poor handling and loss of stability, which could Standard: lead to an accident. Maximum (hard): ECB00090 NOTICE Never turn an adjusting mechanism beyond...
Page 40 Distance A = 197.6 mm (7.78 in) 1. Spring preload adjusting nut 2. Locknut 3. Special wrench A special wrench can be obtained at a Yamaha dealer to make this adjustment. The spring preload setting is determined by 1. Distance A measuring distance A, shown in the illustration.
Page 41 3. Tighten the locknut to the specified torque. NOTICE: Always tighten the locknut against the adjusting nut, and then tighten it to the specified torque. [ECB00081] Tightening torque: Locknut: 42 Nm (4.2 m·kgf, 30 ft·lbf) Rebound damping force Turn the rebound damping force adjusting screw in direction (a) to increase the rebound damping 1.
Page 42 Compression damping force Compression damping setting (for fast com- pression damping): Compression damping force (for fast compression Minimum (soft): damping) 4 turn(s) out from the fully turned in posi- To increase the compression damping force and tion thereby harden the compression damping, turn the Standard: compression damping force adjusting bolt in direc- 2 turn(s) out from the fully turned in posi-...
Page 43: Adjusting The Rear Shock Absorber Assembly (Yfm25Ra/Yfm250Ra)
Do not dispose of a damaged or worn out Minimum (soft): shock absorber assembly yourself. Take the 16 click(s) in direction (b)* shock absorber assembly to a Yamaha deal- Standard: er for any service. 10 click(s) in direction (b)* Maximum (hard):...
Page 44 ECB01090 NOTICE A special wrench can be obtained at a Yamaha Never turn the adjusting mechanism beyond dealer to make this adjustment. the minimum and maximum settings. The spring preload setting is determined by measuring distance A, shown in the illustration.
Page 45: Adjusting The Rear Shock Absorber Assembly (Yfm25Rsea/Yfm250Rsea)
Never turn an adjusting mechanism beyond Do not dispose of a damaged or worn out the minimum and maximum settings. shock absorber assembly yourself. Take the shock absorber assembly to a Yamaha deal- Spring preload er for any service. 1. Loosen the locknut.
Page 46 Distance A = 220.0 mm (8.66 in) 1. Locknut 2. Spring preload adjusting nut A special wrench can be obtained at a Yamaha dealer to make this adjustment. The spring preload setting is determined by measuring distance A, shown in the illustration.
Page 47 3. Tighten the locknut to the specified torque. NOTICE: Always tighten the locknut against the adjusting nut, and then tighten it to the specified torque. [ECB00081] Tightening torque: Locknut: 42 Nm (4.2 m·kgf, 30 ft·lbf) Rebound damping force Turn the rebound damping force adjusting dial in direction (a) to increase the rebound damping 1.
Page 48 Compression damping force Compression damping setting: Turn the compression damping force adjusting Minimum (soft): screw in direction (a) to increase the compression 12 click(s) in direction (b)* damping force and thereby harden the damping, Standard: and in direction (b) to decrease the compression 7 click(s) in direction (b)* damping force and thereby soften the damping.
Page 49 Do not deform or damage the cylinder in any way. Cylinder damage will result in poor damping performance. Do not dispose of a damaged or worn out shock absorber assembly yourself. Take the shock absorber assembly to a Yamaha deal- er for any service. 4-24...
Page 50: Pre-Operation Checks
Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures provided in this manual, have the vehicle inspected by a Yamaha dealer. Before using this vehicle, check the following points:...
Page 51 ITEM ROUTINE PAGE • Check operation. If soft or spongy, have Yamaha dealer bleed hy- draulic system. • Check brake pads for wear, and replace if necessary. Rear brake 5-3, 8-22, 8-23, 8-25 • Check brake fluid level in reservoir, and add recommended brake fluid to specified level if necessary.
Page 52: Fuel
Check that there is no free play in the brake le- do not provide proper braking performance, check ver. If there is free play, have a Yamaha dealer the brake pads for wear. (See page 8-22.) check the brake system.
Page 53: Drive Chain
EBU19770 Recommended tire pressure: Drive chain Front Check the condition of the drive chain and check 27.5 kPa (0.275 kgf/cm², 4.0 psi) the drive chain slack. Lubricate and adjust the Rear drive chain as necessary. (See page 8-29.) 27.5 kPa (0.275 kgf/cm², 4.0 psi) Minimum tire pressure: EBU19794 Tires...
Page 54 EWB02551 WARNING Use of improper tires on this ATV may cause loss of control, increasing your risk of an acci- dent. After extensive tests, only the tires listed below have been approved for this model by Yamaha Motor Co., Ltd.
Page 55: Chassis Fasteners
EBU19850 Front: Instruments, lights and switches Manufacturer/model: Check that all instruments, lights and switches are DUNLOP/KT201 working properly. Correct if necessary. Size: AT20 x 7-10 Type: Tubeless Rear: Manufacturer/model: DUNLOP/KT205A Size: AT19 x 10-9 Type: Tubeless Aftermarket tires and rims The tires and rims that came with your ATV were designed to match the performance capabilities and to provide the best combination of handling,...
Page 56: Operation
If the indicator Read the Owner’s Manual carefully before riding light does not come on, have a Yamaha deal- the ATV. If there is a control or function you do not er check the electrical circuit.
Page 57: Starting A Warm Engine
Ambient temp./starter (choke) position as possible to preserve battery energy. Do not crank the engine more than 10 seconds on each attempt. 7. If the engine is started with the starter (choke) in position (1), the starter (choke) should be returned to position (2) to warm up the engine.
Page 58: Shifting
EBU20522 EBU20592 To start out and accelerate Shifting 1. Release the throttle lever, apply the front or This ATV has a 5-speed forward transmission. The rear brake, and then release the parking transmission allows you to control the amount of brake.
Page 59: Engine Break-In
7. Open the throttle part way and gradually re- ECB00180 NOTICE lease the clutch lever. 8. Follow the same procedure when shifting to Even with the transmission in the neutral po- the next higher gear. sition, do not coast for long periods of time with the engine off, and do not tow the ATV EBU20650 for long distances.
Page 60: Parking
Since the engine is brand new, do not put an ex- Yamaha dealer check the ATV. cessive load on it for the first 320 km (200 mi) or 20 hours. The various parts in the engine wear and...
Page 61: Parking On A Slope
4. Turn the fuel cock to “OFF”. nection to Yamaha manufacture parts and acces- sories or offer other modifications for Yamaha vehicles. Yamaha is not in a position to test the products that these aftermarket companies pro- duce. Therefore, Yamaha can neither endorse nor...
Page 62 Do not mount an accessory where it could inter- Yamaha or modifications not specifically recom- fere with your ability to control the ATV. Exam- mended by Yamaha, even if sold and installed by ples include (but are not limited to) a heavy or a Yamaha dealer.
Page 63 er, you must use common sense and good practice not to exceed 2nd gear whenever you judgment as the stability and handling of an ATV are carrying heavier loads or when towing a trail- can be changed. When adding accessories, keep the following points in mind: Allow more braking distance.
Page 64: Riding Your Atv
EBU21141 RIDING YOUR ATV...
Page 65: Getting To Know Your Atv
EBU21616 RIDE WITH CARE AND GOOD JUDGMENT Get training if you are inexperienced. GETTING TO KNOW YOUR ATV EWB01381 This ATV is intended for recreational use by expe- WARNING rienced operators only. This section, Riding your Do not operate this ATV or allow anyone else ATV, provides general ATV riding instructions for to operate it without proper instruction.
Page 66 Riding your ATV requires skills acquired through practice over a period of time. Do not attempt to operate at maximum perfor- mance until you are totally familiar with the ATV’s handling and performance characteristics. Take the time to learn the basic techniques well before attempting more difficult maneuvers.
Page 67 proved motorcycle helmet increases your chances of a severe head injury or death in the event of an accident. [EWB01411] Wear eye protection when operating your ATV to reduce the risk of a serious accident or injury. Eye protection, such as a face shield or goggles, may reduce the risk of foreign material getting in your eyes and help prevent loss of vision.
Page 68 1. Protective clothing Pre-operation checks 2. Goggles Always inspect your ATV each time you use it to 3. Gloves make sure the ATV is in safe operating condition. 4. Boots 5. Helmet Perform the pre-operation checks listed on page 5-1. Always follow the inspection and maintenance Do not operate after or while consuming alco- procedures and schedules described in the Own- hol or drugs.
Page 69 opening, even when the throttle lever is pushed to Do not exceed the maximum loading limits the maximum. Turning in the adjusting screw limits for the vehicle (see box in this section or ve- the maximum engine power available and de- hicle labeling).
Page 70 All parts and accessories added to this ATV should be genuine Yamaha or equivalent components de- signed for use on this ATV and should be installed and used according to instructions. If you have...
Page 71 questions, consult an authorized ATV dealer. other hot parts. Check under the vehicle after op- WARNING! Operating this ATV with improper erating in areas where combustible materials may modifications may cause changes in handling have collected. Do not idle or park the vehicle in which in some situations could lead to an acci- long dry grass or other dry ground cover.
Page 72: Be Careful Where You Ride
BE CAREFUL WHERE YOU RIDE Watch carefully for other vehicles. Make sure you This ATV is designed for use on unpaved surfaces know your country’s laws and regulations before only. WARNING! Paved surfaces may seriously you ride on unpaved public streets or roads. Do not affect handling and control of the ATV, and ride on any paved public street, road or motorway.
Page 73 have enough time to react to hidden rocks, loose terrain could cause loss of traction or bumps, or holes. Go slowly and be extra care- ATV control, which could result in an accident, ful when operating on unfamiliar terrain. Al- including an overturn.
Page 74 Select a large, flat, unpaved area to become famil- iar with your ATV. Make sure that this area is free of obstacles and other riders. You should practice control of the throttle, brakes, shifting procedures, and turning techniques in this area before trying more difficult terrain.
Page 75: Turning Your Atv
trol. NOTICE: Do not shift gears without To achieve maximum traction on unpaved surfac- [EWB02631] releasing the throttle. Damage to the engine or es, the two rear wheels turn together at the same drive train may occur. speed. Therefore, unless the wheel on the inside [ECB01071] Use this same procedure as you move into the of the turn is allowed to slip or lose some traction,...
Page 76: Climbing Uphill
Improper riding procedures such as abrupt throttle changes, excessive braking, incorrect body move- ments, or too much speed for the sharpness of the turn may cause the ATV to tip. If the ATV begins to tip over to the outside while negotiating a turn, lean more to the inside.
Page 77 Never open the throttle suddenly or make sudden gear changes. The ATV could flip over backwards. Never go over the top of any hill at high speed. An obstacle, a sharp drop, or another vehicle or person could be on the other side of the hill.
Page 78 It is important when climbing a hill to make sure that your weight is transferred forward on the ATV. This can be accomplished by leaning forward and, on steeper inclines, standing on the footrests and leaning forward over the handlebars. Whenever possible, ride straight up hills.
Page 79: Riding Downhill
If you start to roll backwards, DO NOT apply the rear brake, and apply the front brake gradually. The ATV could easily tip over backwards. When fully stopped, apply the rear brake as well, and then lock the parking brake. Dismount the ATV im- mediately on the uphill side or to a side if pointed straight uphill.
Page 80 Never operate the ATV on hills too steep for Whenever possible, ride your ATV straight down- the ATV or for your abilities. The ATV can hill. Avoid sharp angles which could allow the ATV overturn more easily on extremely steep hills to tip or roll over.
Page 81: Crossing A Slope
CROSSING A SLOPE As you travel across a slope, lean your body in the uphill direction. It may be necessary to correct the EWB01632 WARNING steering when riding on loose surfaces by pointing the front wheels slightly uphill. When riding on Improperly crossing hills or turning on hills could cause loss of control or cause the ATV to slopes, be sure not to make sharp turns either up...
Page 82: Crossing Through Shallow Water
CROSSING THROUGH SHALLOW WATER EWB01641 WARNING Operating this vehicle through deep or fast- flowing water can lead to loss of control or an overturn. To reduce your risk of drowning or other injuries, use care when crossing through water. Never operate this ATV water deeper than the depth specified in your Owner’s Man- ual, as tires may float, increasing the risk of an overturn.
Page 83: Riding Over Rough Terrain
1. Air filter case check hose RIDING OVER ROUGH TERRAIN EWB01651 WARNING After riding your ATV in water, be sure to drain the Riding improperly over obstacles could cause trapped water by removing the check hose at the loss of control or a collision. Before operating bottom of the air filter case.
Page 84: Sliding And Skidding
cident. Be sure to keep your feet firmly mounted on the footrests at all times. Avoid jumping the ATV as loss of control and damage to the ATV may result. SLIDING AND SKIDDING EWB01662 WARNING Skidding or sliding improperly may cause you to lose control of this ATV.
Page 85: What To Do If
WHAT TO DO... If your ATV doesn’t turn when you want it to: Bring the ATV to a stop and practice the turning maneuvers again. Be sure you are putting your weight on the footrest to the outside of the turn. Position your weight over the front wheels for better control.
Page 86 If your ATV is traversing a sloping surface: Be sure to ride with your weight positioned to- wards the uphill side of the ATV to maintain proper balance. If the ATV starts to tip, steer down the hill (if there are no obstacles in your way) to regain balance.
Page 87: Periodic Maintenance And Adjustment
The intervals given in the periodic maintenance vice or while using the vehicle. If you are not fa- and lubrication chart should be considered as a miliar with vehicle service, have a Yamaha general guide under normal riding conditions. dealer perform the service.
Page 88: Owner's Manual And Tool Kit
If you do not have the tools or experience required Be sure to put this owner’s manual in the cover and for a particular job, have a Yamaha dealer perform always carry it along with the low-pressure tire it for you.
Page 89: Periodic Maintenance Chart For The Emission Control System
However, keep in mind that if the ATV isn’t used for a long period of time, the month maintenance intervals should be followed. Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills.
Page 90 INITIAL EVERY month Whichev- CHECK OR MAINTENANCE ITEM er comes 1300 2500 2500 5000 first (mi) (200) (800) (1600) (1600) (3200) hours • Check for leakage and replace gasket(s) if neces- sary. √ √ √ Exhaust system • Check for looseness and tighten all screw clamps and joints if necessary.
Page 91: General Maintenance And Lubrication Chart
However, keep in mind that if the ATV isn’t used for a long period of time, the month maintenance intervals should be followed. Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills.
Page 92 INITIAL EVERY month Whichev- CHECK OR MAINTENANCE ITEM er comes 1300 2500 2500 5000 first (mi) (200) (800) (1600) (1600) (3200) hours • Check for cracks or other damage, and replace if √ √ √ √ necessary. Brake hoses • Replace. Every 4 years √...
Page 93 INITIAL EVERY month Whichev- CHECK OR MAINTENANCE ITEM er comes 1300 2500 2500 5000 first (mi) (200) (800) (1600) (1600) (3200) hours • Make sure that all nuts, bolts, and screws are √ √ √ √ √ 14 * Chassis fasteners properly tightened.
Page 94 EBU23071 Some maintenance items need more frequent service if you are riding in unusually wet, dusty, sandy or muddy areas, or at full-throttle. Hydraulic brake service • Regularly check and, if necessary, correct the brake fluid level. • Every two years replace the internal components of the brake master cylinders and calipers, and change the brake fluid.
Page 95: Checking The Spark Plug
(the ideal color when the ATV is ridden normally). If the spark plug shows a distinctly different color, 1. Spark plug cap the engine could be operating improperly. Do not attempt to diagnose such problems yourself. In- stead, have a Yamaha dealer check the ATV.
Page 96: To Install The Spark Plug
2. Check the spark plug for electrode erosion To install the spark plug and excessive carbon or other deposits, and 1. Clean the surface of the spark plug gasket replace it if necessary. and its mating surface, and then wipe off any grime from the spark plug threads.
Page 97: Engine Oil And Oil Filter Element
EBU28957 Engine oil and oil filter element The engine oil should be between the minimum The engine oil level should be checked before and maximum level marks. each ride. In addition, the oil must be changed and the oil filter element must be replaced at the inter- vals specified in the periodic maintenance and lu- brication chart.
Page 98 6. Insert the dipstick into the oil filler hole, and then tighten the engine oil filler cap. Skip steps 5–7 if the oil filter element is not being replaced. To change the engine oil (with or without oil fil- ter element replacement) 5.
Page 99 8. Install the engine oil drain bolt and its new gasket, and then tighten the bolt to the speci- fied torque. Tightening torque: Engine oil drain bolt: 20 Nm (2.0 m·kgf, 14 ft·lbf) 9. Refill with the specified amount of the recom- mended engine oil, and then install and tight- en the engine oil filler cap.
Page 100: Cleaning The Air Filter Element
ECB00300 NOTICE There is a check hose at the bottom of the air filter In order to prevent clutch slippage (since the case. If dust or water collects in this hose, empty engine oil also lubricates the clutch), do not the hose and clean the air filter element and air fil- mix any chemical additives.
Page 101 1. Air filter case cover 1. Air filter element 2. Air filter case cover holder 2. Washer 3. Wing bolt 4. Loosen the wing bolt. 5. Remove the air filter element together with the 6. Remove the wing bolt and washer from the air wing bolt and washer.
Page 102 2. Air filter element frame damaged. 8. Wash the sponge material gently but thor- 11. Apply Yamaha foam air filter oil or other qual- oughly in solvent. WARNING! Always use ity foam air filter oil to the sponge material. parts cleaning solvent to clean the sponge material.
Page 103 1. Air filter element seat 1. Washer 14. Install the washer onto the air filter element 15. Insert the air filter element into the air filter frame, and then insert the wing bolt into the case, and then tighten the wing bolt. NOTICE: hole in the air filter element frame.
Page 104: Cleaning The Spark Arrester
17. Install the seat. The air filter element should be cleaned every 20– 40 hours. It should be cleaned and lubricated more often if the ATV is operated in extremely dusty ar- eas. Each time the air filter element maintenance is performed, check the air inlet of the air filter case for obstructions.
Page 105 1. Tailpipe 1. Gasket 2. Spark arrester 2. Tailpipe 3. Bolt 4. Check the gasket for damage, and replace it if 6. Install the bolts and tighten them to the speci- necessary. fied torque. 5. Make sure the gasket is properly positioned, then insert the tailpipe into the muffler and Tightening torque: align the bolt holes.
Page 106: Adjusting The Carburetor
Therefore, 1. Start the engine and warm it up. most carburetor adjustments should be left to a Yamaha dealer, who has the necessary profes- The engine is warm when it quickly responds to the sional knowledge and experience. The adjustment throttle.
Page 107: Adjusting The Throttle Cable Free Play
2. Loosen the locknut. If the specified idling speed cannot be obtained as 3. To increase the throttle cable free play, turn described above, have a Yamaha dealer make the the throttle cable free play adjusting bolt in di- adjustment.
Page 108: Valve Clearance
If a brake pad has worn to the point that must be adjusted by a Yamaha dealer at the inter- the wear indicator groove has almost disappeared, vals specified in the periodic maintenance and lu- have a Yamaha dealer replace the brake pads as brication chart.
Page 109: Checking The Brake Fluid Level
If a brake pad has worn to the point that a wear indicator groove almost appears, have a Yamaha dealer replace the brake pads as a set. 8-23...
Page 110 Always clean up spilled fluid imme- diately. As the brake pads wear, it is normal for the brake fluid level to gradually go down. However, if the brake fluid level goes down suddenly, have a Yamaha dealer check the cause. 1. Minimum level mark 8-24...
Page 111: Changing The Brake Fluid
EBU24291 Changing the brake fluid Have a Yamaha dealer change the brake fluid at the intervals specified in the TIP after the periodic maintenance and lubrication chart. In addition, have the oil seals of the master cylinders and cali- pers as well as the brake hoses replaced at the in- tervals listed below or whenever they are damaged or leaking.
Page 112: Adjusting The Parking Brake Free Play
1. Brake pedal position 1. Cable length “A” 2. Locknut EBU24712 3. Adjusting bolt Adjusting the parking brake free play 1. Release the parking brake by moving the The parking brake free play must be checked and, parking brake lever to the right. if necessary, adjusted at the intervals specified in 2.
Page 113: Brake Light Switches
ATV off the ground and spin the rear wheels. If the cable length cannot be adjusted to specifica- Check to make sure there is no brake drag. If tion, consult a Yamaha dealer. brake drag is noticed, perform the adjustment 6. Tighten the locknut on the brake cable.
Page 114: Adjusting The Clutch Lever Free Play
10.0 mm (0.20–0.39 in) as shown. If the free play should be adjusted by a Yamaha dealer. is incorrect, adjust it as follows. Turn the adjusting nut while holding the brake light switch in place.
Page 115: Drive Chain Slack
If the specified free play cannot be obtained as de- scribed above or if the clutch does not operate cor- rectly, have a Yamaha dealer check the internal clutch mechanism. EBU26864 Drive chain slack The drive chain slack should be checked before each ride and adjusted if necessary.
Page 116 1. Rear wheel axle pinch bolt 2. Rod 3. Drive chain tensioner 4. Hole A rod can be obtained at a Yamaha dealer to make this adjustment. Tightening torque: Rear axle pinch bolt: 4. Shift the transmission into neutral.
Page 117: Lubricating The Drive Chain
EBU24882 Lubricating the drive chain The drive chain must be cleaned and lubricated at the intervals specified in the periodic maintenance and lubrication chart, otherwise it will quickly wear out, especially when riding in dusty or wet areas. Service the drive chain as follows. ECB00561 NOTICE The drive chain must be lubricated after wash-...
Page 118: Checking And Lubricating The Brake And Clutch Levers
If a cable is damaged or does not move EBU24922 Checking and lubricating the brake and smoothly, have a Yamaha dealer check or replace clutch levers The operation of the brake and clutch levers Recommended lubricant: should be checked before each ride, and the lever Engine oil pivots should be lubricated if necessary.
Page 119: Checking The Shift Pedal
If there is play in a wheel hub or if a wheel does not turn smoothly, have a Yamaha dealer check the wheel hub bear- ings. EBUM0170 Checking the shift pedal The operation of the shift pedal should be checked before each ride.
Page 120: Lubricating The Swingarm Pivots
Lubricating the swingarm pivots For parts equipped with a grease nipple, use a The swingarm pivots must be lubricated by a grease gun. Yamaha dealer at the intervals specified in the pe- riodic maintenance and lubrication chart. Recommended lubricant: Recommended lubricant:...
Page 121: Lubricating The Steering Shaft
Lubricating the steering shaft cause severe burns. Avoid contact with skin, The steering shaft must be lubricated by a Yamaha eyes or clothing. Always shield your eyes dealer at the intervals specified in the periodic when working near batteries.
Page 122 Batteries produce explosive gases. Keep 3. Disconnect the negative battery lead first, sparks, flame, cigarettes or other sources of ig- then the positive battery lead by removing nition away. Ventilate when charging or using their bolt. NOTICE: When removing the bat- in an enclosed space.
Page 123 To charge the battery To install the battery Have a Yamaha dealer charge the battery as soon as possible if it seems to have discharged. Keep in Be sure the battery is fully charged. mind that the battery tends to discharge more quickly if the ATV is equipped with optional electri- 1.
Page 124: Replacing The Fuse
3. Install the battery holding plate by installing the bolts, and then hook the band to secure the owner’s tool kit. 4. Install the seat. (See page 4-12.) EBUM0182 Replacing the fuse The fuse holder is located beside the battery and can be accessed as follows: 1.
Page 125: Replacing A Headlight Bulb
4. If the fuse immediately blows again, have a 1. Headlight unit Yamaha dealer check the electrical system. 2. Bolt 5. Install the battery holding plate by installing 2. Disconnect the headlight coupler.
Page 126 1. Headlight bulb holder cover 1. Headlight bulb holder 2. Headlight coupler 5. Place a new headlight bulb into position. 4. Remove the headlight bulb holder by pushing NOTICE: Do not touch the glass part of the it in and turning it counterclockwise, and then headlight bulb to keep it free from oil, oth- remove the burnt-out bulb.
Page 127: Adjusting A Headlight Beam
10. Adjust the headlight beam if necessary. (YFM25RA/YFM250RA) EBU25561 If the tail/brake light bulb burns out, have a Adjusting a headlight beam Yamaha dealer replace it. ECB00690 NOTICE It is advisable to have a Yamaha dealer make this adjustment. 8-41...
Page 128: Tail/Brake Light (Yfm25Rsea/Yfm250Rsea)
(YFM25RSEA/YFM250RSEA) This model is equipped with an LED type of tail/brake light. If the tail/brake light does not come on, have a Yamaha dealer check it. EBU25651 Removing a wheel 1. Place the ATV on a level surface. 2. Loosen the wheel nuts.
Page 129: Troubleshooting
The following troubleshooting chart represents a quick and easy procedure for checking these vital systems yourself. However, should your ATV re- quire any repair, take it to a Yamaha dealer, whose skilled technicians have the necessary tools, expe- 1. Arrow mark rience, and know-how to service the ATV properly.
Page 130: Troubleshooting Chart
Remove the spark plug and check the electrodes. The engine does not start. Have a Yamaha dealer check the ATV. Check the battery. 4. Battery The engine turns over The battery is good.
Page 131: Cleaning And Storage
EBU25860 CLEANING AND STORAGE EBU25902 may cause water seepage and deteriora- Cleaning tion of wheel bearings, brakes, transmis- Frequent, thorough cleaning of your ATV will not sion seals and electrical devices. Many only enhance its appearance but will improve its expensive repair bills have resulted from general performance and extend the useful life of improper high-pressure detergent applica-...
Page 132: Storage
EBU25933 Specified amount: Storage 7.5 ml of stabilizer to each liter of fuel (or 1 oz of stabilizer to each gallon of fuel) Short-term Always store your ATV in a cool, dry place and, if 5. Perform the following steps to protect the cyl- necessary, protect it against dust with a porous inder, piston rings, etc.
Page 133 ly, turn the wheels a little every month in order to prevent the tires from becoming degraded in one spot. 8. Cover the muffler outlet with a plastic bag to prevent moisture from entering it. 9. Remove the battery and fully charge it. Store it in a cool, dry place and charge it once a month.
Page 134: Specifications
EBU25960 SPECIFICATIONS Dimensions: Vibration on handlebar (EN1032, ISO5008): YFM25RA Will not exceed 2.5 m/s² Overall length: YFM25RSEA Will not exceed 2.5 m/s² 1625 mm (64.0 in) Engine: Overall width: 1072 mm (42.2 in) Engine type: Overall height: Air cooled 4-stroke, SOHC 1040 mm (40.9 in)
Page 135 Fuel: SAE 5W-30, 10W-30, 10W-40, 15W-40, 20W-40 or 20W- Recommended fuel: YFM250RA Unleaded gasoline only YFM250RSEA Unleaded gasoline only YFM25RA Regular unleaded gasoline only 130 ˚F YFM25RSEA Regular unleaded gasoline only Fuel tank capacity: SAE 5W-30 9.0 L (2.38 US gal, 1.98 Imp.gal)
Page 136 Secondary reduction ratio: Rear tire: 38/14 (2.714) Type: Transmission type: Tubeless Constant mesh 5-speed Size: Operation: AT19 x 10-9 Left foot operation Manufacturer/model: Gear ratio: DUNLOP/KT205A 1st: Loading: 37/13 (2.846) Maximum loading limit: 2nd: 100.0 kg (220 lb) 33/18 (1.833) (Total weight of rider, cargo, accessories, and tongue) 3rd: Tire air pressure (measured on cold tires):...
Page 137 12 V, 30/30 W × 2 Type: Double wishbone Tail/brake light: YFM250RA 12 V, 5.0/21.0 W × 1 Spring/shock absorber type: YFM25RA 12 V, 5.0/21.0 W × 1 YFM250RA Coil spring/oil damper YFM250RSEA Coil spring/gas-oil damper Tail/brake light: YFM25RA Coil spring/oil damper YFM250RSEA LED...
Page 138: Consumer Information
Record the vehicle identification number and mod- el label information in the spaces provided below for assistance when ordering spare parts from a Yamaha dealer or for reference in case the ATV is stolen. VEHICLE IDENTIFICATION NUMBER: 1. Vehicle identification number...
Page 139 EBU26050 Model label The model label is affixed at the location in the il- lustration. Record the information on this label in the space provided. This information will be need- ed when ordering spare parts from a Yamaha deal- 11-2...
Page 140 Engine, starting a warm ..........6-2 Brake fluid level, checking ..........8-23 Engine stop switch ............4-2 Brake lever free play, checking the front ...... 8-25 Brake lever (YFM25RA/YFM250RA) ......4-5 Brake lever (YFM25RSEA/YFM250RSEA) ....4-5 Fuel ................. 4-8, 5-3 Brake light switches ............. 8-27 Fuel cock ..............
Page 141 Swingarm pivots, lubricating ........8-34 Parking ................6-5 Tail/brake light bulb, replacing Parking brake free play, adjusting ........ 8-26 (YFM25RA/YFM250RA) ..........8-41 Parking brake lever ............4-6 Tail/brake light (YFM25RSEA/YFM250RSEA) .... 8-42 Parking on a slope ............6-6 Throttle cable free play, adjusting ........ 8-21 Part locations ..............
Page 142 YAMAHA MOTOR CO., LTD. PRINTED ON RECYCLED PAPER PRINTED IN JAPAN 2010.04-0.8×1 CR...

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