DT125R

1 PRINTED ON RECYCLED PAPERPRINTED IN JAPAN2000 12 1(E) !OWNER S MANUAL3MB-28199-E7DT125 RYAMAHA MOTOR CO., to the Yamaha world of motorcycling!As the owner of a DT125R , you are benefiting from Yamaha s vast experience in and newest tech-nology for the design and the manufacture of high-quality products, which have earned Yamaha areputation for take the time to read this manual thoroughly, so as to enjoy all your DT125R s 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 addition, the many tips given in this manual will help to keep your motorcycle in the best possiblecondition. If you have any further questions, do not hesitate to contact your Yamaha Yamaha team wishes you many safe and pleasant rides. So, remember to put safety first! 3MB-9-E7 12/27/00 2:52 PM Page 1 IMPORTANT MANUAL INFORMATION123456789 EAU00005 Particularly important information is distinguished in this manual by the following notations:The Safety Alert Symbol means ATTENTION!

2 BECOME ALERT! YOUR SAFETYIS INVOLVED!Failure to follow WARNING instructions could result in severe injury or death to themotorcycle operator, a bystander or a person inspecting or repairing the CAUTION indicates special precautions that must be taken to avoid damage tothe NOTE provides key information to make procedures easier or :NOTE:8 This manual should be considered a permanent part of this motorcycle and should remainwith it even if the motorcycle is subsequently continually seeks advancements in product design and quality. Therefore, while thismanual contains the most current product information available at the time of printing, theremay be minor discrepancies between your motorcycle and this manual. If there is any ques-tion concerning this manual, please consult your Yamaha dealer. 3MB-9-E7 12/27/00 2:52 PM Page 2 IMPORTANT MANUAL INFORMATION12456789EW000002wPLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATINGTHIS MOTORCYCLE.

3 3MB-9-E7 12/27/00 2:52 PM Page 3123456789DT125 ROWNER S MANUAL 2000 by Yamaha Motor Co., Edition, December 2000 All rights reprinting or unauthorized usewithout the written permission ofYamaha Motor Co., expressly in 3MB-9-E7 12/27/00 2:52 PM Page 4 EAU00009 TABLE OF CONTENTS123456789 GIVE SAFETY THE RIGHT OF AND CONTROL level indicator circuit temperature brake brake tank (except for Switzerland and Austria)..3-7 Fuel (for Switzerland and Austria)..3-7 Catalyzer (for Switzerland and Austria)..3-8 Two-stroke engine (choke) 1 ..3-10 Kick shock absorber on handling of the Yamaha EnergyInduction System ( ).. (Yamaha Power Valve System).. switch operation check AND IMPORTANT the a warm shift points(for Switzerland only)..5-4 Tips for reducing fuel 3MB-9-E7 12/27/00 2:52 PM Page 5 PERIODIC MAINTENANCE AND maintenance and lubrication removal and removal and the speed cable free play lever free play brake lever free play brake pedal height light switch the front and rear brake the brake fluid fluid chain slack chain slack chain inspection and cable and grip pump and shift pedal and clutch lever fork bulb signal light bulb light bulb the wheel wheel wheel wheel OF CONTENTS1234567896 3MB-9-E7 12/27/00 2:52 PM Page 6 TABLE OF CONTENTS123456789 MOTORCYCLE CARE AND to use the conversion number identification identification 3MB-9-E7 12/27/00 2:52 PM Page 71-1 Motorcycles are fascinating vehicles, which can give you an unsurpassed feeling of power and free-dom.

4 However, they also impose certain limits, which you must accept; even the best motorcycledoes not ignore the laws of care and maintenance are essential for preserving your motorcycle s value and operatingcondition. Moreover, what is true for the motorcycle is also true for the rider: good performancedepends on being in good shape. Riding under the influence of medication, drugs and alcohol is, ofcourse, out of the question. Motorcycle riders - more than car drivers - must always be at their mentaland physical best. Under the influence of even small amounts of alcohol, there is a tendency to takedangerous clothing is as essential for the motorcycle rider as seat belts are for car drivers and passen-gers. Always wear a complete motorcycle suit (whether made of leather or tear-resistant syntheticmaterials with protectors), sturdy boots, motorcycle gloves and a properly fitting helmet.

5 Optimum pro-tective wear, however, should not encourage carelessness. Though full-coverage helmets and suits,in particular, create an illusion of total safety and protection, motorcyclists will always be who lack critical self-control run the risk of going too fast and are apt to take chances. This iseven more dangerous in wet weather. The good motorcyclist rides safely, predictably and defensively- avoiding all dangers, including those caused by your ride!EAU00021 QQGIVE SAFETY THE RIGHT OF WAY123456789 3MB-9-E7 12/27/00 2:52 PM Page 8 3MB-9-E7 12/27/00 2:52 PM Page 9 EAU00026 DESCRIPTION1234567892-112345678910 Left (page 6-33) cap (page 6-13) cock (page 3-9) filter (page 6-15) reservoir tank (page 6-13) holder (page 3-12) (choke) (page 3-10) pedal (page 3-5, 5-4) (page 3-14) (page 3-15) 3MB-9-E7 12/27/00 2:52 PM Page 10 DESCRIPTION1234567892-21112131415 Right kit (page 6-1) (page 6-33) oil tank (page 3-9) brake pedal (page 3-6, 6-22) shock absorber spring preload adjusting nut (page 3-13) 3MB-9-E7 12/27/00 2:52 PM Page lever (page 3-5, 6-21) handlebar switches (page 3-4) (page 3-3) temperature gauge (page 3-4) (page 3-3) handlebar switches (page 3-5) brake lever (page 3-6, 6-27) grip (page 6-17, 6-27) tank cap (page 3-6) switch (page 3-1)16171819202122232425 Controls/Instruments 3MB-9-E7 12/27/00 2.

6 52 PM Page 123-1 ONOFFEAU00028 Main switchThe main switch controls the ignitionand lighting systems. Its operation isdescribed circuits are switched engine can be started. The keycannot be removed in this electrical circuits are switched key can be removed in this AND CONTROL FUNCTIONS123456789 EAU00063 High beam indicator light & This indicator comes on when theheadlight high beam is level indicator light 7 This indicator comes on when the oillevel is low. This light circuit can bechecked by the procedure on page not run the motorcycle untilyou know it has sufficient if the oil is filled to the specifiedlevel, the indicator light may flickerwhen riding on a slope or during sud-den acceleration or deceleration, butthis is lightsEAU00057 Turn indicator light 5 This indicator flashes when the turnswitch is moved to the left or indicator light N This indicator comes on when thetransmission is in indicator light 5 beam indicator light & indicator light N level indicator light 7 3MB-9-E7 12/27/00 2:52 PM Page 13 EAU00075 Oil level indicator circuit check3-2 INSTRUMENT AND CONTROL FUNCTIONS123456789 Turn the main switch to ON.

7 Put the transmission in level indicator lightdoes not come a Yamaha dealer toinspect electrical level indicator lightcomes level indicator lightdoes not come engine into oil level and electrical circuit are ahead with level indicator lightcomes on. 3MB-9-E7 12/27/00 2:52 PM Page 143-3 INSTRUMENT AND CONTROL zoneEAU00102 TachometerThis model is equipped with atachometer so the rider can monitorthe engine speed and keep it withinthe ideal power not operate in the red zone: 10,500 r/min and above4231 EAU01087 SpeedometerThe speedometer shows ridingspeed. This speedometer is equippedwith an odometer and trip trip odometer can be reset to 0 with the reset knob. Use the tripodometer to estimate how far youcan ride on a tank of fuel. This infor-mation will enable you to plan fuelstops in the knobNOTE:(for German model equipped withspeed limiter only)This motorcycle is equipped with aspeed limiter which prevents it fromexceeding a top speed of 80 km/h.

8 3MB-9-E7 12/27/00 2:52 PM Page 153-4 INSTRUMENT AND CONTROL FUNCTIONS123456789 EAU00127 Turn signal switchTo signal a right-hand turn, push theswitch to 6 . To signal a left-handturn, push the switch to 4 . Oncethe switch is released it will return tothe center position. To cancel the sig-nal, push the switch in after it hasreturned to the center switch * Press the switch to sound the temperature zoneEAU01652 Coolant temperature gaugeThis gauge indicates the coolant tem-perature when the main switch is engine operating temperaturewill vary with changes in weather andengine load. If the needle points tothe red zone or higher, stop yourmotorcycle and let the engine cool.(See page 6-13 for details.)EC000002cCWhen the engine is overheated, donot continue signal switch * EAU00118 Handlebar switchesEAU00134 Lights switchTurning the light switch to ' ,turns on the auxiliary light, meterlights and taillight.

9 Turning the lightswitch to : , turns the headlight switchTurn the switch to & for the highbeam and to % for the low beam. 3MB-9-E7 12/27/00 2:52 PM Page 163-5 INSTRUMENT AND CONTROL stop switchEAU00138 Engine stop switchThe engine stop switch is a safetydevice for use in an emergency suchas when the motorcycle overturns orif trouble occurs in the throttle sys-tem. Turn the switch to # to startthe engine. In case of emergency,turn the switch to $ to stop leverThe clutch lever is located on the lefthandlebar. Pull the clutch lever to thehandlebar to disengage the clutch,and release the lever to engage theclutch. The lever should be pulledrapidly and released slowly forsmooth clutch pedalThis motorcycle is equipped with aconstant-mesh 6-speed shift pedal is located on the leftside of the engine and is used incombination with the clutch lever 3MB-9-E7 12/27/00 2:52 PM Page 173-6 INSTRUMENT AND CONTROL brake leverEAU00158 Front brake leverThe front brake lever is located onthe right handlebar.

10 Pull it toward thehandlebar to apply the front brake pedalEAU00162 Rear brake pedalThe rear brake pedal is on the rightside of the motorcycle. Press downon the brake pedal to apply the tank capTo openInsert the key and turn it 1/4 turncounterclockwise. Turn the cap 1/3turn counterclockwise and remove itfrom the closePut the cap in the filler neck and turnit 1/3 turn clockwise. Lock the cap byturning the key 1/4 turn clockwise,and remove the tank 3MB-9-E7 12/27/00 2:52 PM Page 183-7 INSTRUMENT AND CONTROL FUNCTIONS123456789 NOTE:The tank cap cannot be reinstalledunless it is unlocked. The key mustremain in the cap until the cap isproperly installed and locked onto thefuel sure the cap is properlyinstalled and locked in placebefore riding the levelEAU01183 Fuel(except for Switzerland andAustria)Make sure there is sufficient fuel inthe tank.