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OWNER'S MANUAL
DT125R
3MB-28199-E8

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Table of Contents

   Also See for YAMAHA DT125R

   Summary of Contents for YAMAHA DT125R

  • Page 1 OWNER’S MANUAL DT125R 3MB-28199-E8...
  • Page 2 Yamaha a rep- utation for dependability. Please take the time to read this manual thoroughly, so as to enjoy all advantages of your DT125R. The owner’s manual does not only instruct you in how to operate, inspect and maintain your motorcy- cle, but also in how to safeguard yourself and others from trouble and injury.
  • Page 3: Important Manual Information

    8 This manual should be considered a permanent part of this motorcycle and should remain with it even if the motorcycle is subsequently sold. 8 Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the most current product information available at the time of printing, there may be minor discrepancies between your motorcycle and this manual.
  • Page 4 IMPORTANT MANUAL INFORMATION EW000002 PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS MOTORCYCLE.
  • Page 5 EAU03337 DT125R OWNER’S MANUAL © 2001 by Yamaha Motor Co., Ltd. 1st Edition, May 2001 All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Co., Ltd. is expressly prohibited. Printed in Japan.
  • Page 6: Table Of Contents

    EAU00009 TABLE OF CONTENTS GIVE SAFETY THE RIGHT OF WAY ....1-1 Kickstarter ............ 3-10 Steering lock ..........3-10 DESCRIPTION ..........2-1 Seat .............. 3-11 Left view ............2-1 Helmet holder ..........3-12 Right view ............2-2 Adjusting the shock absorber assembly ..3-12 Controls and instruments .......
  • Page 7 TABLE OF CONTENTS PERIODIC MAINTENANCE AND Checking and lubricating the MINOR REPAIR ..........6-1 throttle grip and cable ........ 6-29 Owner’s tool kit ..........6-1 Adjusting the Autolube pump ....... 6-30 Periodic maintenance and lubrication chart ... 6-2 Checking and lubricating the brake and Removing and installing cowlings ....
  • Page 8 TABLE OF CONTENTS SPECIFICATIONS ..........8-1 Conversion table ..........8-5 CONSUMER INFORMATION ......9-1 Identification numbers ........9-1 Key identification number ....... 9-1 Vehicle identification number ......9-1 Model label ............. 9-2...
  • Page 9: Give Safety The Right Of Way

    EAU00021 Q GIVE SAFETY THE RIGHT OF WAY Motorcycles are fascinating vehicles, which can give you an unsurpassed feeling of power and free- dom. However, they also impose certain limits, which you must accept; even the best motorcycle does not ignore the laws of physics. Regular care and maintenance are essential for preserving value and operating condition of your motorcycle.
  • Page 11: Description

    EAU00026 DESCRIPTION Left view 1. Headlight (page 6-36) 6. Helmet holder (page 3-12) 2. Radiator cap (page 6-14) 7. Starter (choke) lever (page 3-10) 3. Fuel cock (page 3-9) 8. Shift pedal (page 3-4, 5-2) 4. Air filter element (page 6-16) 9.
  • Page 12: Right View

    DESCRIPTION Right view 11. Owner’s tool kit (page 6-1) 16. Shock absorber spring 12. Fuse (page 6-35) preload adjusting nut (page 3-12) 13. Battery (page 6-33) 14. 2-stroke engine oil tank (page 3-8) 15. Brake pedal (page 3-5, 6-23)
  • Page 13: Controls And Instruments

    DESCRIPTION Controls and instruments 1. Clutch lever (page 3-4, 6-22) 6. Right handlebar switch (page 3-4) 2. Left handlebar switches (page 3-3) 7. Brake lever (page 3-5, 6-23) 3. Speedometer unit (page 3-2) 8. Throttle grip (page 6-18, 6-29) 4. Coolant temperature gauge (page 3-3) 9.
  • Page 14: Instrument And Control Functions

    3. If the warning light does not This indicator light flashes when the All electrical systems are supplied come on, have a Yamaha dealer turn signal switch is pushed to the left with power, and the engine can be check the electrical circuit.
  • Page 15: Speedometer Unit

    INSTRUMENT AND CONTROL FUNCTIONS NOTE: Only for the German model equipped with a speed limiter: The speed limiter prevents the motor- cycle from exceeding a riding speed of 80 km/h. 1. Speedometer unit 1. Tachometer 2. Odometer 2. Red zone 3.
  • Page 16: Coolant Temperature Gauge

    INSTRUMENT AND CONTROL FUNCTIONS EAU03889 Turn signal switch “4/6” To signal a right-hand turn, push this switch to “6”. To signal a left-hand turn, push this switch to “4”. When released, the switch returns to the center position. To cancel the turn signal lights, push the switch in after it has returned to the center position.
  • Page 17: Clutch Lever

    INSTRUMENT AND CONTROL FUNCTIONS 1. Engine stop switch “#/$” 1. Clutch lever 1. Shift pedal EAU03890 EAU00155 EAU00157 Clutch lever Shift pedal Engine stop switch “#/$” Set this switch to “#” before starting The clutch lever is located at the left The shift pedal is located on the left the engine.
  • Page 18: Brake Lever

    INSTRUMENT AND CONTROL FUNCTIONS 1. Brake lever 1. Brake pedal 1. Fuel tank cap 2. Unlock. EAU00158 EAU00162 3. Open. Brake lever Brake pedal EAU00177 The brake lever is located at the right The brake pedal is on the right side Fuel tank cap handlebar grip.
  • Page 19: Fuel (except For Switzerland And Austria)

    INSTRUMENT AND CONTROL FUNCTIONS To install the fuel tank cap 1. Insert the fuel tank cap into the tank opening with the key insert- ed in the lock, and then turn the cap 1/3 turn clockwise. 2. Turn the key 1/4 turn clockwise, and then remove it.
  • Page 20: Catalytic Converter (for Switzerland And Austria)

    The exhaust system is hot after EAU00185 operation. Make sure that the exhaust system has cooled down Your Yamaha engine has been Immediately wipe off spilled fuel before doing any maintenance designed to use regular unleaded with a clean, dry, soft cloth, since work.
  • Page 21: 2-stroke Engine Oil

    INSTRUMENT AND CONTROL FUNCTIONS EC000114 Recommended oil: Yamalube 2 or equivalent The following precautions must be 2-stroke engine oil (JASO observed to prevent a fire hazard grade “FC”, or ISO grades or other damages. or “EG-D”) 8 Use only unleaded gasoline. Oil quantity: The use of leaded gasoline will 1.2 L...
  • Page 22: Fuel Cock

    INSTRUMENT AND CONTROL FUNCTIONS OFF: closed position ON: normal position RES: reserve position FUEL FUEL FUEL 1. Arrow mark positioned over “OFF” 1. Arrow mark positioned over “ON” 1. Arrow mark positioned over “RES” EAU03050 Fuel cock With the lever in this position, fuel This indicates reserve.
  • Page 23: Starter (choke) Lever

    INSTRUMENT AND CONTROL FUNCTIONS 1. Starter (choke) lever “1” 1. Kickstarter 1. Steering lock cover 2. Steering lock EAU03839 EAU00212 EAU02934 Starter (choke) lever “1” Kickstarter Steering lock Starting a cold engine requires a rich- To start the engine, fold out the kick- To lock the steering er air-fuel mixture, which is supplied starter lever, move it down lightly with...
  • Page 24: Seat

    INSTRUMENT AND CONTROL FUNCTIONS To unlock the steering 1. Open the steering lock cover, and then insert the key. 2. Push the key in, turn it 1/8 turn counterclockwise that moves out, and then release it. 3. Remove the key, and then close the lock cover.
  • Page 25: Helmet Holder

    INSTRUMENT AND CONTROL FUNCTIONS EAU03591 Adjusting the shock absorber assembly This shock absorber assembly is equipped with spring preload adjusting nut. EC000015 Never attempt to turn an adjusting mechanism beyond the maximum 1. Open. 1. Locknut 2. Adjusting nut or minimum settings. EAU00261 Adjust the spring preload as follows.
  • Page 26 Minimum (soft): this will result in poor damp- Distance A = 235 mm ing performance. Standard: 8 Always have a Yamaha dealer Distance A = 230 mm service the shock absorber. Maximum (hard): Distance A = 220 mm 3-13...
  • Page 27: Carrier

    Improper installation of or damage to YPVS (Yamaha Power Valve any part of the YEIS (Yamaha 8 Do not exceed the load limit of System). This system boosts engine Energy Induction System) will result 2 kg for the carrier. performance and efficiency by means in poor performance.
  • Page 28: Sidestand

    Therefore, check this system key in the “ON” position. regularly as described below and EC000024 have a Yamaha dealer repair it if it does not function properly. If the YPVS does not operate, have a Yamaha dealer check it.
  • Page 29: Ignition Circuit Cut-off System

    Periodically check the operation of the ignition circuit cut-off system according to the following procedure. EW000045 If a malfunction is noted, have a Yamaha dealer check the system before riding. 3-16...
  • Page 30 5. Push the kickstarter lever down. Does the engine start? The neutral switch may be defective. The motorcycle should not be ridden until checked by a Yamaha dealer. With the engine still running: 6. Move the sidestand up. 7. Keep the clutch lever pulled.
  • Page 31: Pre-operation Checks

    • If necessary, add recommended coolant to specified level. 6-12–6-15 • Check cooling system for leakage. • Check operation. • If soft or spongy, have Yamaha dealer bleed hydraulic system. • Check lever free play. Front brake • Adjust if necessary.
  • Page 32 • Adjust if necessary. • Make sure that operation is smooth. Throttle grip • Check free play. 6-18, 6-29 • If necessary, have Yamaha dealer make adjustment or lubricate. • Make sure that operation is smooth. Control cables 6-29 • Lubricate if necessary.
  • Page 33 • Correct if necessary. • Check operation of ignition circuit cut-off system. Sidestand switch 3-15–3-17 • If system is defective, have Yamaha dealer check vehicle. • Check fluid level. Battery 6-33–6-35 • Fill with distilled water if necessary.
  • Page 34: Operation And Important Riding Points

    Yamaha dealer check the electrical ground and distract the opera- circuit. tor, resulting in a possible loss of control.
  • Page 35: Starting A Warm Engine

    OPERATION AND IMPORTANT RIDING POINTS EAU01258 4. Turn the starter (choke) on and Starting a warm engine completely close the throttle. Follow the same procedure as for (See page 3-10 starter starting a cold engine with the excep- (choke) operation.) tion that the starter (choke) is not 5.
  • Page 36: Recommended Shift Points (for Switzerland Only)

    OPERATION AND IMPORTANT RIDING POINTS EC000048 EAU02937 EAU00424 Recommended shift points Tips for reducing fuel (for Switzerland only) consumption 8 Even with the transmission in The recommended shift points during Fuel consumption depends largely on the neutral position, do not acceleration are shown in the table your riding style.
  • Page 37: Engine Break-in

    1,000 km. The various parts in engine at one set throttle posi- in period, immediately have a the engine wear and polish them- tion. Yamaha dealer check the vehi- selves to the correct operating clear- cle. ances. During this period, prolonged 500–1,000 km...
  • Page 38: Parking

    OPERATION AND IMPORTANT RIDING POINTS EAU00458 Parking When parking, stop the engine, remove the key from the main switch, and then turn the fuel cock lever to “OFF”. EW000058 8 Since the engine and exhaust system can become very hot, park in a place where pedestri- ans or children are not likely to touch them.
  • Page 39: Periodic Maintenance And Minor Repair

    If you do not have the tools or experi- Periodic inspection, adjustment and ence required for a particular job, lubrication will keep your vehicle in have a Yamaha dealer perform it for the safest and most efficient condi- you. tion possible. The most important...
  • Page 40: Periodic Maintenance And Lubrication Chart

    8 The annual checks must be performed every year, except if a kilometer-based maintenance is performed instead. 8 From 30,000 km, repeat the maintenance intervals starting from 6,000 km. 8 Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills.
  • Page 41 PERIODIC MAINTENANCE AND MINOR REPAIR ODOMETER READING (× 1,000 km) ANNUAL ITEM CHECK OR MAINTENANCE JOB CHECK • Check runout, spoke tightness and for damage. √ √ √ √ Wheels • Tighten spokes if necessary. • Check tread depth and for damage. •...
  • Page 42 PERIODIC MAINTENANCE AND MINOR REPAIR ODOMETER READING (× 1,000 km) ANNUAL ITEM CHECK OR MAINTENANCE JOB CHECK • Check starter (choke) operation. √ √ √ √ √ √ Carburetor • Adjust engine idling speed. • Check operation. √ √ √ √...
  • Page 43: Removing And Installing Cowlings

    PERIODIC MAINTENANCE AND MINOR REPAIR 1. Cowling A 1. Cowling C 1. Screw (×2) 2. Cowling B EAU01534 Refer to this section each time a EAU01065 Cowling A Removing and installing cowling needs to be removed and To remove the cowling cowlings installed.
  • Page 44 PERIODIC MAINTENANCE AND MINOR REPAIR 1. Screw (×3) EAU01534 To install the cowling To install the cowling Cowling B Place the cowling in the original posi- Place the cowling in the original posi- To remove the cowling tion, and then install the screws. tion, and then install the screws.
  • Page 45: Removing And Installing Panels

    PERIODIC MAINTENANCE AND MINOR REPAIR 1. Screw (×3) 1. Panel A EAU01534 EAU01122 To install the cowling Removing and installing Cowling C Place the cowling in the original posi- panels To remove the cowling tion, and then install the screws. Remove the cowling screws, and The panels shown above need to be then pull the cowling off as shown.
  • Page 46 PERIODIC MAINTENANCE AND MINOR REPAIR 1. Panel B 1. Screw 1. Screw 2. Panel A 2. Panel B Refer to this section each time a EAU04003 To install the panel panel needs to be removed and Panels A and B Place the panel in the original posi- installed.
  • Page 47: Checking The Spark Plug

    Instead, shown, with the spark plug The spark plug is an important have a Yamaha dealer check the wrench included in the owner’s engine component, which is easy to motorcycle. tool kit. check. Since heat and deposits will cause any spark plug to slowly erode, 2.
  • Page 48: Transmission Oil

    PERIODIC MAINTENANCE AND MINOR REPAIR EAU04272 Tightening torque: Transmission oil Spark plug: The transmission oil level should be 20 Nm (2.0 m0kgf) checked before each ride. In addition, the transmission oil must be changed NOTE: at the intervals specified in the peri- If a torque wrench is not available odic maintenance and lubrication when installing a spark plug, a good...
  • Page 49 PERIODIC MAINTENANCE AND MINOR REPAIR 1. Transmission oil level check window 1. Oil filler cap 1. Transmission oil drain bolt 2. Minimum level mark To change the transmission oil 4. Install the transmission oil drain 3. Wait a few minutes until the oil 1.
  • Page 50: Coolant

    PERIODIC MAINTENANCE AND MINOR REPAIR EAU01808 Recommended transmission oil: Coolant See page 8-1. Oil quantity: To check the coolant level Periodic oil change: 1. Place the motorcycle on a level 0.75 L surface and hold it in an upright Total amount (dry transmission): position.
  • Page 51 8 If water has been added to the coolant, have a Yamaha dealer check the antifreeze content of the coolant as soon as possi- ble, otherwise the effective- ness of the coolant will be reduced.
  • Page 52: Changing The Coolant

    PERIODIC MAINTENANCE AND MINOR REPAIR 1. Radiator stopper bolt 1. Coolant drain bolt 1. Reservoir tank hose 2. Radiator cap 4. Place a container under the 5. Disconnect the reservoir tank EAU03101 Changing the coolant engine and remove the coolant hose on the reservoir tank side drain bolt.
  • Page 53 NOTE: sion. If any leakage is found, ask a 8 If water has been added to the Yamaha dealer to inspect the cooling coolant, have a Yamaha dealer system. check the antifreeze content of the coolant as soon as possi- 15.
  • Page 54: Cleaning The Air Filter Element

    PERIODIC MAINTENANCE AND MINOR REPAIR 1. Screw (×3) 1. Air filter element guide 2. Air filter case cover 2. Air filter element frame 3. Remove the air filter element 3. Sponge material EAU04233 4. Wing nut from the case. Cleaning the air filter 4.
  • Page 55: Adjusting The Carburetor

    8. Install the air filter element onto to a Yamaha dealer, who has the the periodic maintenance and lubrica- the guide, and then tighten the necessary professional knowledge tion chart.
  • Page 56: Adjusting The Throttle Cable Free Play

    NOTE: NOTE: If the specified idling speed cannot The engine idling speed must be cor- be obtained as described above, rectly adjusted before checking and have a Yamaha dealer make the adjusting the throttle cable free play. adjustment. 6-18...
  • Page 57: Tires

    PERIODIC MAINTENANCE AND MINOR REPAIR EAU04259 8 NEVER OVERLOAD Tire air pressure Tires (measured on cold tires) MOTORCYCLE! Operation of To maximize the performance, dura- Load* Front Rear an overloaded motorcycle may bility, and safe operation of your 125 kPa 150 kPa result in tire damage, loss of Up to 90 kg...
  • Page 58 PERIODIC MAINTENANCE AND MINOR REPAIR EAU00681 Tire information This motorcycle is equipped with tube 8 Have a Yamaha dealer replace tires. excessively worn tires. EW000078 Besides being illegal, operat- ing the motorcycle with exces- 8 The front and rear tires should...
  • Page 59: Spoke Wheels

    If any damage is found, have a Yamaha dealer replace wheel. attempt even the smallest repair to the wheel. A deformed or cracked wheel must be replaced.
  • Page 60: Adjusting The Clutch Lever Free Play

    PERIODIC MAINTENANCE AND MINOR REPAIR 3. If the specified clutch lever free play could obtained described above, tighten the locknut and skip the rest of the procedure, otherwise proceed as follows. 4. Fully turn the adjusting bolt at the clutch lever in direction a to loosen the clutch cable.
  • Page 61: Adjusting The Brake Lever Free Play

    Yamaha dealer adjust it. 1. Loosen the locknut at the brake lever. 2. To increase the brake lever free play, turn the adjusting bolt in direction a.
  • Page 62: Adjusting The Rear Brake Light Switch

    If there is air in the hydraulic sys- and lubrication chart. tem, have a Yamaha dealer bleed the system before operating the motorcycle. Air in the hydraulic 1. Brake light switch system will diminish the braking 2.
  • Page 63: Checking The Brake Fluid Level

    Yamaha dealer replace disc, have a Yamaha dealer replace leakage. If the brake level is low, be the brake pads as a set.
  • Page 64: Changing The Brake Fluid

    EAU03976 REAR Changing the brake fluid fluid. Mixing fluids may result in a Have a Yamaha dealer change the harmful chemical reaction and brake fluid at the intervals specified in lead to poor braking perfor- the NOTE after the periodic mainte- mance.
  • Page 65: Drive Chain Slack

    PERIODIC MAINTENANCE AND MINOR REPAIR EAU00744 Drive chain slack The drive chain slack should be checked before each ride and adjust- ed if necessary. To check the drive chain slack 1. Place the motorcycle on a level surface and hold it in an upright position.
  • Page 66: Lubricating The Drive Chain

    PERIODIC MAINTENANCE AND MINOR REPAIR EAU03006 2. Wipe the drive chain dry. NOTE: Lubricating the drive chain 3. Thoroughly lubricate the drive Make sure that both adjusting plates The drive chain must be cleaned and chain with a special O-ring chain are in the same position for proper lubricated at the intervals specified in lubricant.
  • Page 67: Checking And Lubricating The Cables

    If a specified in the periodic maintenance cable is damaged or does not move chart. smoothly, have a Yamaha dealer check or replace it. Recommended lubricant: Engine oil EW000112...
  • Page 68: Adjusting The Autolube Pump

    Yamaha dealer at the intervals speci- should be lubricated if necessary. be lubricated if necessary. fied in the periodic maintenance and...
  • Page 69: Checking And Lubricating The Sidestand

    Securely support the motorcycle 1. Place the motorcycle on a level Yamaha dealer check or repair it. so that there is no danger of it surface and hold it in an upright falling over. position. 2. While applying the front brake,...
  • Page 70: Checking The Steering

    Yamaha 1. Place a stand under the engine dealer check the wheel bearings. to raise the front wheel off the ground.
  • Page 71: Battery

    PERIODIC MAINTENANCE AND MINOR REPAIR 3. If the electrolyte is at or below the minimum level mark, add dis- tilled water to raise it to the maxi- mum level mark. 1. Battery 1. Maximum level mark 2. Battery breather hose 2.
  • Page 72 PERIODIC MAINTENANCE AND MINOR REPAIR EW000117 8 Take care not to spill elec- To store the battery trolyte on the drive chain, as 1. If the motorcycle will not be used 8 Electrolyte is poisonous and this may weaken it, shorten more than month,...
  • Page 73: Replacing The Fuse

    Replacing the fuse 4. If the fuse immediately blows The fuse holder is located behind again, have a Yamaha dealer panel B. (See page 6-8 for panel check the electrical system. removal and installation procedures.) If the fuse is blown, replace it as fol- lows.
  • Page 74: Replacing The Headlight Bulb

    PERIODIC MAINTENANCE AND MINOR REPAIR 1. Bolt (×2) 1. Headlight coupler 1. Headlight bulb holder 2. Headlight bulb cover EAU01158 4. Remove the headlight bulb hold- 3. Disconnect the headlight cou- Replacing the headlight bulb er by turning it counterclockwise, pler, and then remove the head- If the headlight bulb burns out, and then remove the defective...
  • Page 75: Replacing A Turn Signal Light Bulb

    PERIODIC MAINTENANCE AND MINOR REPAIR 7. Install the headlight unit by installing the bolts. 8. Install the cowling. 9. Have a Yamaha dealer adjust the headlight beam if necessary. a. Do not touch this area. 1. Screw 2. Lens EW000119 3.
  • Page 76: Replacing The Tail/brake Light Bulb

    PERIODIC MAINTENANCE AND MINOR REPAIR ECA00065 EC000108 Do not overtighten the screw, oth- Do not overtighten the screws, erwise the lens may break. otherwise the lens may break. 1. Screw (×2) 2. Lens 3. Bulb EAU01623 Replacing the tail/brake light bulb 1.
  • Page 77: Supporting The Motorcycle

    8 It is advisable to have a stand is not available, by placing Yamaha dealer service the a jack under the frame in front of wheel. the rear wheel.
  • Page 78 PERIODIC MAINTENANCE AND MINOR REPAIR ECA00048 Do not apply the brake after the wheel has been removed together with the brake disc, otherwise the brake pads will be forced shut. 1. Speedometer cable 1. Speedometer gear unit 2. Axle holder nut (×4) EAU03555 3.
  • Page 79 PERIODIC MAINTENANCE AND MINOR REPAIR 7. After tightening the holder nuts, while applying the front brake, push down on the handlebars several times to check if the front fork compress and rebounds smoothly. 8. Connect the speedometer cable. 1. Retainer a.
  • Page 80: Rear Wheel

    5. Push the wheel forward, and then remove the drive chain from 8 It is advisable to have a the rear sprocket. Yamaha dealer service the wheel. NOTE: 8 Securely support the motorcy- The drive chain does not need to be...
  • Page 81: Troubleshooting

    Use only genuine Yamaha replace- fied torques. ment parts. Imitation parts may look like Yamaha parts, but they are often Tightening torques: inferior, have a shorter service life Axle nut: and can lead to expensive repair 90 Nm (9.0 m0kgf)
  • Page 82: Troubleshooting Charts

    Open throttle half-way and start Wipe clean with dry cloth and correct Wet. spark gap or replace spark plug. the engine. Remove spark plug and check electrodes. Engine doesn’t start, ask a Yamaha Dry. Ask a Yamaha dealer to inspect. dealer to inspect. 6-44...
  • Page 83: Engine Overheating

    Restart the engine. If the engine overheats again, ask a Level is OK. Yamaha dealer to inspect and 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 rec- ommended coolant as soon as possible.
  • Page 84: Motorcycle Care And Storage

    EAU03521 MOTORCYCLE CARE AND STORAGE Before cleaning Cleaning Care 1. Cover the muffler outlet with a ECA00010 While the open design of a motorcy- plastic bag after the engine has cle reveals the attractiveness of the 8 Avoid using strong acidic cooled down.
  • Page 85 MOTORCYCLE CARE AND STORAGE 8 Do not use any harsh chemical 8 For motorcycles equipped After riding in the rain, near the sea products on plastic parts. Be with a windshield: Do not use or on salt-sprayed roads sure to avoid using cloths or strong cleaners hard...
  • Page 86 8 Before operating the motorcy- removed through polishing.) NOTE: cle test its braking perfor- 4. To prevent corrosion, it is recom- Consult a Yamaha dealer for advice mance and cornering behav- mended to apply a corrosion pro- on what products to use. ior.
  • Page 87: Storage

    MOTORCYCLE CARE AND STORAGE Long-term a. Remove the spark plug cap Storage Before storing your motorcycle for and spark plug. Short-term several months: b. Pour a teaspoonful of engine Always store your motorcycle in a 1. Follow all the instructions in the oil into the spark plug bore.
  • Page 88 MOTORCYCLE CARE AND STORAGE 6. Lubricate all control cables and NOTE: the pivoting points of all levers Make any necessary repairs before and pedals as well as of the storing the motorcycle. sidestand/centerstand. 7. Check and, if necessary, correct the tire air pressure, and then lift the motorcycle so that both of its wheels ground.
  • Page 89: Specifications

    EAU01038 SPECIFICATIONS Specifications Compression ratio 6.7:1 Model DT125R Starting system Kickstarter Dimensions Lubrication system Separate lubrication Overall length 2,170 mm (Yamaha Autolube) 2,235 mm (N, S, SF, CH, A only) Engine oil (2-cycle) Overall width 830 mm Type 2-stroke engine oil...
  • Page 90 SPECIFICATIONS Carburetor Chassis Manufacturer MIKUNI Frame type Semi double cradle Model × quantity TM28SS × 1 Caster angle 27°30’ Spark plug Trail 113 mm Manufacturer/model NGK / BR9ES Tire NGK / BR8ES (CH, A only) Front Spark plug gap 0.7–0.8 mm Type With tube Clutch type...
  • Page 91 SPECIFICATIONS 90 kg load–maximum Rear load* Type Single disc brake Front 150 kPa (1.50 kgf/cm , 1.50 bar) Operation Right foot operation Rear 175 kPa (1.75 kgf/cm , 1.75 bar) Fluid DOT 4 Off-road riding Suspension Front 125 kPa (1.25 kgf/cm , 1.25 bar) Front Telescopic fork...
  • Page 92 SPECIFICATIONS Battery Type GM3-3B Voltage, capacity 12 V, 3 AH Headlight type Conventional incandescent bulb Bulb voltage, wattage × quantity 12 V, 45/40 W × 1 Headlight 12 V, 5/21 W × 1 Tail/brake light 12 V, 21 W × 2 Front turn signal light 12 V, 21 W ×...
  • Page 93: Conversion Table

    SPECIFICATIONS EAU03941 Conversion table CONVERSION TABLE Conver s i o n t a bl e All specification data in this manual are listed in SI and METRIC TO IMPERIAL METRIC UNITS. Metric unit Multiplier Imperial unit m • kgf 7.233 ft •...
  • Page 94: Consumer Information

    Record the key identification number, vehicle identification number and model label information in the spaces provided below for assistance when ordering spare parts from a Yamaha dealer or for reference in case the vehicle is stolen. 1. Key identification number 1.
  • Page 95: Model Label

    CONSUMER INFORMATION 1. Model label EAU03757 Model label The model label is affixed to the loca- tion shown. Record the information on this label in the space provided. This information will be needed when ordering spare parts from a Yamaha dealer.
  • Page 96 YAMAHA MOTOR CO., LTD. PRINTED ON RECYCLED PAPER PRINTED IN JAPAN 2001·6–0.3×1(E)

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  • #unknown Aug 28, 2015 03:26:
    3FW-054513​
    What model
    Yama​ha dt125r
    Yes​/No?
  • DAVID ROWAN Jun 14, 2015 01:48:
    MY BIKE WONT START SO GONNA SWAP IT FOR A Q8AD SOMEONE THAT KNOWS SOMETHING ABOUT TEM IT JUST ABOUT STARTED THE OTHER NIGHT
  • DAVID Jun 14, 2015 01:53:
    thankyou for lettig me download the manual
  • ian Bradley Mar 24, 2015 09:47:
    Where do the tubes go on the carburetto​r
    The I think the last two days to get carburetto​r