OWNER'S MANUAL DT125R 3MB-28199-E8 EAU03338 INTRODUCTION Welcome to the Yamaha world of motorcycling! As the owner of a DT125R, you are benefiting from Yamaha's vast experience and newest technology regarding the design and manufacture of high-quality products, which have earned Yamaha a reputation 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 motorcycle, but also in how to safeguard yourself and others from trouble and injury. In addition, the many tips given in this manual will help keep your motorcycle in the best possible condition. If you have any further questions, do not hesitate to contact your Yamaha dealer. The Yamaha team wishes you many safe and pleasant rides. So, remember to put safety first! EAU00005 IMPORTANT MANUAL INFORMATION Particularly important information is distinguished in this manual by the following notations: Q w cC NOTE: The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Failure to follow WARNING instructions could result in severe injury or death to the motorcycle operator, a bystander, or a person inspecting or repairing the motorcycle. A CAUTION indicates special precautions that must be taken to avoid damage to the motorcycle. A NOTE provides key information to make procedures easier or clearer. NOTE: 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. If you have any questions concerning this manual, please consult your Yamaha dealer. IMPORTANT MANUAL INFORMATION w EW000002 PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS MOTORCYCLE. 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. EAU00009 TABLE OF CONTENTS 1 2 GIVE SAFETY THE RIGHT OF WAY ............... 1-1 DESCRIPTION .................................................. 2-1 Left view ......................................................... 2-1 Right view ....................................................... 2-2 Controls and instruments ............................... 2-3 INSTRUMENT AND CONTROL FUNCTIONS .. 3-1 Main switch ..................................................... 3-1 Indicator and warning lights ............................ 3-1 Speedometer unit .......................................... 3-2 Tachometer .................................................... 3-2 Coolant temperature gauge ............................ 3-3 Handlebar switches ........................................ 3-3 Clutch lever .................................................... 3-4 Shift pedal ...................................................... 3-4 Brake lever ..................................................... 3-5 Brake pedal .................................................... 3-5 Fuel tank cap .................................................. 3-5 Fuel (except for Switzerland and Austria) ...... 3-6 Fuel (for Switzerland and Austria) ................. 3-6 Catalytic converter (for Switzerland and Austria) ....................... 3-7 2-stroke engine oil .......................................... 3-8 Fuel cock ........................................................ 3-9 Starter (choke) lever ..................................... 3-10 Kickstarter .................................................... 3-10 Steering lock ................................................. 3-10 Seat .............................................................. 3-11 Helmet holder ............................................... 3-12 Adjusting the shock absorber assembly ....... 3-12 Carrier .......................................................... 3-14 YEIS handling precautions .......................... 3-14 YPVS ............................................................ 3-14 Sidestand ..................................................... 3-15 Ignition circuit cut-off system ........................ 3-16 3 4 PRE-OPERATION CHECKS ............................. 4-1 Pre-operation check list .................................. 4-1 OPERATION AND IMPORTANT RIDING POINTS ............................................... 5-1 Starting a cold engine .................................... 5-1 Starting a warm engine .................................. 5-2 Shifting ........................................................... 5-2 Recommended shift points (for Switzerland only) .................................. 5-3 Tips for reducing fuel consumption ................ 5-3 Engine break-in .............................................. 5-4 Parking ........................................................... 5-5 5 TABLE OF CONTENTS 6 PERIODIC MAINTENANCE AND MINOR REPAIR ................................................ 6-1 Owner's tool kit ............................................... 6-1 Periodic maintenance and lubrication chart ... 6-2 Removing and installing cowlings .................. 6-5 Removing and installing panels ...................... 6-7 Checking the spark plug ................................. 6-9 Transmission oil ........................................... 6-10 Coolant ......................................................... 6-12 Changing the coolant ................................... 6-14 Cleaning the air filter element........................ 6-16 Adjusting the carburetor ............................... 6-17 Adjusting the engine idling speed ................ 6-17 Adjusting the throttle cable free play ............ 6-18 Tires ............................................................. 6-19 Spoke wheels ............................................... 6-21 Adjusting the clutch lever free play ............... 6-22 Adjusting the brake lever free play ............... 6-23 Adjusting the brake pedal position ............... 6-23 Adjusting the rear brake light switch ............. 6-24 Checking the front and rear brake pads ....... 6-24 Checking the brake fluid level ...................... 6-25 Changing the brake fluid .............................. 6-26 Drive chain slack .......................................... 6-27 Lubricating the drive chain ........................... 6-28 Checking and lubricating the cables ............. 6-29 Checking and lubricating the throttle grip and cable ................................ 6-29 Adjusting the Autolube pump ....................... 6-30 Checking and lubricating the brake and shift pedals ................................................ 6-30 Checking and lubricating the brake and clutch levers .............................................. 6-30 Checking and lubricating the sidestand ....... 6-31 Checking the front fork ................................. 6-31 Checking the steering ................................... 6-32 Checking the wheel bearings ....................... 6-32 Battery .......................................................... 6-33 Replacing the fuse ....................................... 6-35 Replacing the headlight bulb ........................ 6-36 Replacing a turn signal light bulb ................. 6-37 Replacing the tail/brake light bulb ................ 6-38 Supporting the motorcycle ............................ 6-39 Front wheel ................................................... 6-39 Rear wheel ................................................... 6-42 Troubleshooting ............................................ 6-43 Troubleshooting charts ................................. 6-44 7 MOTORCYCLE CARE AND STORAGE ........... 7-1 Care ................................................................ 7-1 Storage ........................................................... 7-4 TABLE OF CONTENTS 8 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 9 Q GIVE SAFETY THE RIGHT OF WAY EAU00021 1 Motorcycles are fascinating vehicles, which can give you an unsurpassed feeling of power and freedom. 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. Moreover, what is true for the motorcycle is also true for the rider: good performance depends on being in good shape. Riding under the influence of medication, drugs and alcohol is, of course, out of the question. Motorcycle riders--more than car drivers--must always be at their mental and physical best. Under the influence of even small amounts of alcohol, there is a tendency to take dangerous risks. Protective clothing is as essential for the motorcycle rider as seat belts are for car drivers and passengers. Always wear a complete motorcycle suit (whether made of leather or tear-resistant synthetic materials with protectors), sturdy boots, motorcycle gloves and a properly fitting helmet. Optimum protective wear, however, should not encourage carelessness. Although full-coverage helmets and suits, in particular, create an illusion of total safety and protection, motorcyclists will always be vulnerable. Riders who lack critical self-control run the risk of going too fast and are apt to take chances. This is even more dangerous in wet weather. The good motorcyclist rides safely, predictably and defensively--avoiding all dangers, including those caused by others. Enjoy your ride! 1-1 EAU00026 DESCRIPTION Left view 1 2 23 4 5 6 10 98 7 1. 2. 3. 4. 5. Headlight Radiator cap Fuel cock Air filter element Coolant reservoir tank (page 6-36) (page 6-14) (page 3-9) (page 6-16) (page 6-12) 6. 7. 8. 9. 10. 2-1 Helmet holder Starter (choke) lever Shift pedal YEIS YPVS (page 3-12) (page 3-10) (page 3-4, 5-2) (page 3-14) (page 3-14) DESCRIPTION Right view 11 12 13 14 2 16 15 11. 12. 13. 14. 15. Owner's tool kit Fuse Battery 2-stroke engine oil tank Brake pedal (page 6-1) (page 6-35) (page 6-33) (page 3-8) (page 3-5, 6-23) 16. Shock absorber spring preload adjusting nut (page 3-12) 2-2 DESCRIPTION Controls and instruments 1 2 3 4 5 6 7 2 10 1. 2. 3. 4. 5. Clutch lever Left handlebar switches Speedometer unit Coolant temperature gauge Tachometer (page 3-4, 6-22) (page 3-3) (page 3-2) (page 3-3) (page 3-2) 9 6. 7. 8. 9. 10. 2-3 8 Right handlebar switch Brake lever Throttle grip Fuel tank cap Main switch (page 3-4) (page 3-5, 6-23) (page 6-18, 6-29) (page 3-5) (page 3-1) EAU00027 INSTRUMENT AND CONTROL FUNCTIONS EAU00061 ON OFF 4 123 Neutral indicator light "N" This indicator light comes on when the transmission is in the neutral position. EAU04258 EAU00028 Main switch The main switch controls the ignition and lighting systems. The various main switch positions are described below. EAU00036 1. 2. 3. 4. Turn signal indicator light "5" High beam indicator light "&" Neutral indicator light "N" 2-stroke engine oil level warning light "7" EAU03034 Indicator and warning lights EAU00057 ON All electrical systems are supplied with power, and the engine can be started. The key cannot be removed. EAU00038 Turn signal indicator light "5" This indicator light flashes when the turn signal switch is pushed to the left or right. EAU00063 2-stroke engine oil level warning light "7" This warning light comes on when the 2-stroke engine oil level is low. The electrical circuit of the warning light can be checked according to the following procedure. 1. Turn the key to "ON". 2. Shift the transmission into the neutral position. 3. If the warning light does not come on, have a Yamaha dealer check the electrical circuit. NOTE: Even if the 2-stroke engine oil level is sufficient, the warning light may flicker when riding on a slope or during sudden acceleration or deceleration, but this is not a malfunction. 3 OFF All electrical systems are off. The key can be removed. High beam indicator light "&" This indicator light comes on when the high beam of the headlight is switched on. 3-1 INSTRUMENT AND CONTROL FUNCTIONS 2 1 NOTE: Only for the German model equipped with a speed limiter: The speed limiter prevents the motorcycle from exceeding a riding speed of 80 km/h. 1 2 3 1. 2. 3. 4. 4 3 1. Tachom ...