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- DT125R
- Owner's Manual
Yamaha DT125R Owner's Manual
Summary of DT125R
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1d0-f8199-e2 dt125r dt125x owner’s manual 1d0-f8199-e2.Qxd 20/9/04 11:32 página 1.
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1d0-f8199-e2.Qxd 20/9/04 11:32 página 2.
Page 3: Introduction
Eau10100 welcome to the yamaha world of motorcycling! As the owner of the dt125r/x, 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 r...
Page 4: Important Manual Information
Eau10150 particularly important information is distinguished in this manual by the following notations: important manual information caution a caution indicates special precautions that must be taken to avoid damage to the motorcycle. Note: a note provides key information to make procedures easier o...
Page 5: Important Manual Information
Eaus1171 important manual information dt125r/x owner’s manual ©2004 by yamaha motor spain s.A. 1st edition, july 2004 all rights reserved any reprinting or unauthorized use without the written permission of yamaha motor spain s.A. Is expressly prohibited. Printed in spain. 1d0-f8199-e2.Qxd 20/9/04 1...
Page 6: Table of Contents
Safety information .....................1-1 description.....................................2-1 left view ...........................................2-1 right view .........................................2-2 controls and instruments .................2-3 instruments and control functions ..............
Page 7: Table of Contents
Front wheel .....................................6-26 rear wheel ......................................6-28 troubleshooting ..............................6-29 motorcycle care and storage ........................................7-1 care ..................................................7-1 storage .....
Page 8: Safety Information
Eau10310 motorcycles are single track vehicles. Their safe use and operation are dependent upon the use of proper riding techniques as well as the expertise of the operator. Every operator should know the following requirements before riding this motorcy- cle. He or she should: ● obtain thorough ins...
Page 9: Safety Information
• always obey the speed limit and never travel faster than warranted by road and traffic conditions. • always signal before turning or changing lanes. Make sure that other motorists can see you. ● the posture of the operator and passenger is important for proper control. • the operator should keep b...
Page 10: Safety Information
Loading and accessories adding accessories or cargo to your motorcycle can adversely affect sta- bility and handling if the weight distri- bution of the motorcycle is changed. To avoid the possibility of an acci- dent, use extreme caution when adding cargo or accessories to your motorcycle. Use extr...
Page 11: Safety Information
• bulky or large accessories may seriously affect the stability of the motorcycle due to aerody- namic effects. Wind may attempt to lift the motorcycle, or the motorcycle may become unstable in cross winds. These accessories may also cause instability when passing or being passed by large vehicles. ...
Page 12: Description
Eau10410 left view description 2-1 2 1 7 2 8 5 6 3 4 9 1. Headlight (page 6-24) 2. Radiator cover (page 6-5) 3. Fuel cock (page 3-7) 4. Air filter (page 6-10) 5. Choke lever (page 3-8) 6. Shift pedal (page 3-4) 7. Y.E.I.S (page 3-9) 8. Y.P.V.S. (page 3-9) 9. Oil tank (page 3-7) 1d0-f8199-e2.Qxd 20/9...
Page 13: Description
Eau10420 right view description 2-2 2 13 11 12 14 11. Tool kit (page 6-1) 12. Fuse (page 6-24) 13. Coolant tank (page 6-8) 14. Rear brake pedal (page 3-5) 1d0-f8199-e2.Qxd 20/9/04 11:32 página 13.
Page 14: Descripcion
Eau10430 controls and instruments descripcion 2-3 2 0 km/h 4 0 6 0 8 0 1 0 0 1 2 0 1 3 0 2 0 y 0 0 0 0 1 5 0 0 0 8 16 17 18 19 20 22 23 21 16. Clutch lever (page 3-4) 17. Left handlevar swicht (page 3-3) 18. Speedometer (page 3-3) 19. Coolant temperature warning lamp (page 3-3) 20. Indicators (page ...
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Eau10460 main switch/steering lock the main switch/steering lock con- trols the ignition and lighting systems, and is used to lock the steering. The various positions are described below. Eau10550 on all electrical circuits are supplied with power, the meter lighting, taillight, license plate light ...
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Eau11002 indicator and warning lights 1. Turn signal indicator light “ b ” 2. Dimmer indicator light “ j ” 3. Neutral indicator light “ n ” 4. Oil level warning light “ z ” eau11030 turn signal indicator lights “c” and “d” the corresponding indicator light flas- hes when the turn signal switch is pu...
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Eau11640 speedometer unit 1. Odometer 2. Tripmeter 3. Reset button 4. Coolant temperature warning lamp the speedometer unit is equipped with a speedometer, an odometer and a tripmeter. The speedometer shows riding speed. The odometer shows the total distance traveled. The trip- meter shows the dista...
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Stop the engine in case of an emer- gency, such as when the motorcycle overturns or when the throttle cable is stuck. Eau12710 start switch “g” push this switch to crank the engine with the starter. Eca10050 caution see page 5-1 for starting instruc- tions prior to starting the engine. Eau12763 haza...
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Eau12890 brake lever 1. Brake lever the brake lever is located at the right handlebar grip. To apply the front bra- ke, pull the lever toward the handle- bar grip. Eau12941 brake pedal 1. Brake pedal the brake pedal is on the right side of the motorcycle. To apply the rear bra- ke, press down on the...
Page 20
Note: the fuel tank cap cannot be installed unless the key is in the lock. In addi- tion, the key cannot be removed if the cap is not properly installed and loc- ked. Ewa10120 s s warning make sure that the fuel tank cap is properly closed and locked before riding. Eau13220 fuel make sure that there...
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Eca10700 caution the following precautions must be observed to prevent a fire hazard or other damages. ● use only unleaded gasoline. The use of leaded gasoline will cause unrepairable damage to the catalytic converter. ● never park the vehicle near possible fire hazards such as grass or other materi...
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Res this indicates reserve. If you run out of fuel while riding, move the lever to this position. Fill the tank at the first opportunity. Be sure to set the lever back to “on” after refueling! Eau13590 starter (choke) lever “q” 1. Choke lever starting a cold engine requires a richer air-fuel mixture...
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Eau15090 shock absorber ewa10220 s s warning this shock absorber contains highly pressurized nitrogen gas. For proper handling, read and understand the following informa- tion before handling the shock absorber. The manufacturer cannot be held responsible for property damage or personal injury that ...
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Eca10150 caution the ypvs has been set and exten- sively tested at the yamaha factory. Changing these settings without sufficient technical knowledge may result in poor performance of or damage to the engine. Ypvs operation noises can be heard in the following instances: ● when the key is turned to ...
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Note: this check is most reliable if performed with a warmed-up engine. Instrument and control functions 3-11 3 with the engine turned off: 1. Move the sidestand down. 2. Make sure that the engine stop switch is turned on. 3. Turn the key on. 4. Shift the transmission into the neutral position. 5. P...
Page 26: Pre-Operation Checks
Eau15591 the condition of a vehicle is the owner’s responsibility. Vital compo- nents can start to deteriorate quickly and unexpectedly, even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leakage or loss of tire air pressure could have seriou...
Page 27: Pre-Operation Checks
Pre-operation checks 4-2 4 eau15603 pre-operation check list item checks page • check fuel level in fuel tank. Fuel • refuel if necessary. 3-6 • check fuel line for leakage. • check oil level in oil tank. 2-stroke engine oil • if necessary, add recommended oil to specified level. 3-7 • check vehicle...
Page 28: Pre-Operation Checks
Control cables • make sure that operation is smooth. 6-21 • lubricate if necessary. • check chain slack. Drive chain • adjust if necessary. 6-19/6-20 • check chain condition. • lubricate if necessary. • check for damage. Wheels and tires • check tire condition and tread depth. 6-13 • check air press...
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Eau15950 ewa10270 s s warning ● become thoroughly familiar with all operating controls and their functions before riding. Consult a yamaha dealer regarding any control or func- tion that you do not thoroughly understand. ● never start the engine or ope- rate it in a closed area for any length of tim...
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7. When the engine is warm, turn the starter (choke) off. Note: the engine is warm when it responds normally to the throttle with the starter (choke) turned off. Eau16640 starting a warm engine follow the same procedure as for starting a cold engine with the excep- tion that the starter (choke) is n...
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After every hour of operation, stop the engine, and then let it cool for five to ten minutes. Vary the engine speed from time to time. Do not operate the engine at one set throttle position. 150–500 km (90–300 mi) avoid prolonged operation above 1/2 throttle. Rev the engine freely through the gears,...
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Eau17240 safety is an obligation of the owner. Periodic inspection, adjustment and lubrication will keep your vehicle in the safest and most efficient condi- tion possible. The most important points of inspection, adjustment, and lubrication are explained on the follo- wing pages. The intervals give...
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Eau17710 periodic maintenance and lubrication chart note: ● the annual checks must be performed every year, except if a kilometer-based maintenance is performed instead. ● from 30000 km, repeat the maintenance intervals starting from 6000 km. ● items marked with an asterisk should be performed by a ...
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Odometer reading (x 1000 km) annual check no item check or maintenance job 1 6 12 18 24 9 * tires • check tread depth and for damage. • replace if necessary. • check air pressure. √ √ √ √ √ • correct if necessary. 10 * wheel bearings • check bearing for looseness or damage. √ √ √ √ 11 * swingarm • c...
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Odometer reading (x 1000 km) annual check no item check or maintenance job 1 6 12 18 24 22 transmission oil • check oil level. √ √ √ √ √ √ • change. √ √ 23 * cooling system • check coolant level and vehicle for coolant leakage. √ √ √ √ √ • change. Every 3 years 24 * front and rear • check operation....
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Eau18711 removing and installing cowlings and panels 1. Cowling a 2. Cowling b 3. Panel d 1. Cowling c 2. Panel e the cowlings and panels shown need to be removed to perform some of the maintenance jobs described in this chapter. Refer to this section each time a cowling or panel needs to be removed...
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Eau19292 panels d and e 1. Screw to remove one of the panels remove the screw, and then pull the panel off as shown. To install the panel place the panel in the original posi- tion, and then install the screw. Eau19620 checking the spark plug 1. Spark plug inspection the spark plug is an important e...
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Tightening torque: spark plug: 20 nm (2 m•kgf) note: if a torque wrench is not available when installing a spark plug, a good estimate of the correct torque is 1/4–1/2 turn past finger tight. Howe- ver, the spark plug should be tighte- ned to the specified torque as soon as possible. Eau19950 transm...
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1. Start the engine, warm it up for several minutes, and then turn it off. 2. Place an oil pan under the trans- mission to collect the used oil. 3. Remove the oil filler cap and drain bolt to drain the oil from the transmission. 4. Install the transmission oil drain bolt, and then tighten it to the ...
Page 40
Note: the coolant should be between the minimum and maximum level marks. 4. If the coolant is at or below the minimum level mark, open the reservoir cap, add coolant to the maximum level mark, and then close the reservoir cap. Coolant reservoir capacity: 0,3 l (0,32 us qt) eca10470 caution ● if cool...
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Tightening torque: coolant drain bolt: 10 nm (1,0 m•kgf) 8. Connect the coolant reservoir hose. 9. Pour the recommended coolant into the radiator until it is full. Recommended antifreeze: high quality ethylene glycol antifree- ze containing corrosion inhibitors for aluminum engines antifreeze/water ...
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To clean the air filter element 1. Remove panel e. (see page 6-6.) 2. Remove the air filter case cover by removing the screws. 3. Pull the air filter element out. 1. Guide 2. Filter 4. Remove the sponge material from the air filter element frame, clean it with solvent, and then squeeze the remaining...
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Eau21340 adjusting the engine idling speed 1. Idle adjusting bolt the engine idling speed must be checked and, if necessary, adjusted as follows at the intervals specified in the periodic maintenance and lubrica- tion chart. The engine should be warm before making this adjustment. Note: ● the engine...
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Eau21590 tires to maximize the performance, durabi- lity, and safe operation of your motorcycle, note the following points regarding the specified tires. Tire air pressure the tire air pressure should be chec- ked and, if necessary, adjusted befo- re each ride. Ewa10500 s s warning ● the tire air pr...
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Tire inspection 1.Wear limit 2. Side wall the tires must be checked before each ride. If the center tread depth reaches the specified limit, if the tire has a nail or glass fragments in it, or if the sidewall is cracked, have a yama- ha dealer replace the tire immediately. Minimum tire tread depth (...
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Ewa10570 s s warning ● have a yamaha dealer replace excessively worn tires. Besides being illegal, operating the motorcycle with excessively worn tires decreases riding stability and can lead to loss of control. ● the replacement of all wheel- and brake-related parts, inclu- ding the tires, should b...
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Note: if the specified clutch lever free play could be obtained as described abo- ve, tighten the locknut and skip the rest of the procedure, otherwise pro- ceed as follows. 3. Fully turn the adjusting bolt at the clutch lever in direction (a) to loo- sen the clutch cable. 1. Lock nut 2. Adjusting n...
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Eau22192 adjusting the brake pedal position and free play 1. Footrest (a) brake pedal position ewa10670 s s warning it is advisable to have a yamaha dealer make these adjustments. Brake pedal position the top of the brake pedal should be positioned approximately 12-15 mm (0,47-0,49 in) below the top...
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Turn the adjusting nut while holding the rear brake light switch in place. To make the brake light come on earlier, turn the adjusting nut in direction (a). To make the brake light come on later, turn the adjusting nut in direction (b). Eau22340 checking the front and rear brake pads 1. Wear limit i...
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Recommended brake fluid: dot 4 ● refill with the same type of brake fluid. Mixing fluids may result in a harmful chemical reaction and lead to poor braking performan- ce. ● be careful that water does not enter the brake fluid reservoir when refilling. Water will signifi- cantly lower the boiling poi...
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Eau22960 to adjust the drive chain slack 1. Axle nut 2. Chain tensioner 1. Loosen the axle nut. 2. To tighten the drive chain, turn the adjusting plate on each side of the swingarm in direction (a). To loosen the drive chain, turn the adjusting plate on each side of the swingarm in direction (b), an...
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Eau23100 checking and lubricating the cables the operation of all control cables and the condition of the cables should be checked before each ride, and the cables and cable ends should be lubricated if necessary. If a cable is damaged or does not move smoothly, have a yamaha dealer check or repla- ...
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Recommended lubricant: lithium-soap-based grease (all-pur- pose grease) eau23271 checking the front fork the condition and operation of the front fork must be checked as follows at the intervals specified in the perio- dic maintenance and lubrication chart. To check the condition ewa10750 s s warnin...
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2. Hold the lower ends of the front fork legs and try to move them forward and backward. If any free play can be felt, have a yamaha dealer check or repair the stee- ring. Eau23290 checking the wheel bearings the front and rear wheel bearings must be checked at the intervals spe- cified in the perio...
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2. If the battery will be stored for more than two months, check it at least once a month and fully charge it if necessary. 3. Fully charge the battery before installation. 4. After installation, make sure that the battery leads are properly connected to the battery termi- nals. Eca10630 caution ● a...
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This model is equipped with quartz bulb headlights. If a headlight bulb burns out, replace it as follows. 1. Remove cowling a. (see page 6-5.) 2. Disconnect the headlight coupler, and then remove the headlight bulb cover. 3. Remove the headlight bulb hol- der according to the following illustration,...
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Eca10680 caution do not overtighten the screws, otherwise the lens may break. Eau24201 replacing a turn signal light bulb 1. Screw 2. Lens 3. Bulb 1. Remove the turn signal light lens by removing the screw. 2. Remove the defective bulb by pushing it in and turning it coun- terclockwise. 3. Insert a ...
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Ewa10820 s s warning ● it is advisable to have a yama- ha dealer service the wheel. ● securely support the motorcy- cle so that there is no danger of it falling over. 1. Disconnect the speedometer cable from the front wheel. 2. Loosen the wheel axle holder nuts, then the wheel axle. 3. Lift the fron...
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1. Gap 7. After tightening the axle holder nuts, push down hard on the handlebars several times while applying the front brake to check if the front fork compresses and rebounds smoothly. 8. Connect the speedometer cable. Eau25080 rear wheel eau25230 to remove the rear wheel 1. Axle retainer bolt ew...
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Eca11070 caution do not apply the brake after the wheel has been removed together with the brake disc, otherwise the brake pads will be forced shut. Eau25530 to install the rear wheel 1. Install the drive chain onto the rear sprocket, and then insert the wheel axle from the left-hand side. Note: mak...
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Eau25921 troubleshooting charts starting problems or poor engine performance ewa10840 s s warning keep away open flames and do not smoke while checking or working on the fuel system. Periodic maintenance and minor repair 6-30 6 check the fuel level in the fuel tank. 1. Fuel there is enough fuel. The...
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Note: if coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolant as soon as possible. Periodic maintenance and minor repair 6-31 6 wait until the engine has cooled. Check the coolant level in the reservoir and radiator. The coolant ...
Page 63: Motorcycle Care and Storage
Eau26000 care while the open design of a motorcy- cle reveals the attractiveness of the technology, it also makes it more vul- nerable. Rust and corrosion can develop even if high-quality compo- nents are used. A rusty exhaust pipe may go unnoticed on a car, however, it detracts from the overall app...
Page 64: Motorcycle Care and Storage
Ve any marks. If the windshield is scratched, use a quality plastic polishing compound after washing. After normal use remove dirt with warm water, a mild detergent, and a soft, clean sponge, and then rinse thoroughly with clean water. Use a toothbrush or bottle- brush for hard-to-reach areas. Stub-...
Page 65: Motorcycle Care and Storage
Eca10800 caution ● apply spray oil and wax spa- ringly and make sure to wipe off any excess. ● never apply oil or wax to any rubber and plastic parts, but treat them with a suitable care product. ● avoid using abrasive polishing compounds as they will wear away the paint. Note: consult a yamaha deal...
Page 66: Motorcycle Care and Storage
Ewa10950 s s warning to prevent damage or injury from sparking, make sure to ground the spark plug electrodes while turning the engine over. 6. Lubricate all control cables and the pivoting points of all levers and pedals as well as of the sidestand/centerstand. 7. Check and, if necessary, correct t...
Page 67: Specifications
Dimensions overall length dt125re 2210 mm dt125x 2139 mm overall width 795 mm overall height dt125re 1200 mm dt125x 1121 mm seat height dt125re 900 mm dt125x 886 mm wheelbase dt125re 1415 mm dt125x 1396 mm ground clearance dt125re 300 mm dt125x 271 mm minimum turning radius dt125re 2100 mm dt125x 20...
Page 68: Specifications
5th 22/23 (0.957) 6th 18/22 (0.818) chassis frame type semi double cradle caster angle dt125re 27.00 degree dt125x 24.50 degree trail dt125re 107.0 mm dt125x 73.1 mm front tire type with tube size dt125re 80/90-21 48p dt125x 120/70-17 58h manufacturer/model dt125re michelin/t63 dt125x pirelli/sport ...
Page 69: Specifications
Charging system ac magneto battery model gt6b-3 voltage, capacity 12 v, 6.0 ah headlight bulb type halogen bulb bulb voltage, wattage x quantity headlight 12 v, 600 w/55.0 w x 1 tail/brake light 12 v, 21.0 w/5.0 w x 1 front turn signal light 12 v, 10.0 w x 2 rear turn signal light 12 v, 10.0 w x 2 a...
Page 70: Consumer Information
Eau26351 identification numbers 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. Key identification number: vehicl...
Page 71: Consumer Information
Eau26440 engine serial number 1. Engine serial number the engine serial number is stamped into the crankcase. Eau26480 model label 1. Model label the model label is affixed to the frame under the seat. (see page 3-8.) record the information on this label in the space provided. This information will ...
Page 72: Index
A adjusting the autolube pump ..................6-21 adjusting the brake lever free play ..........6-16 adjusting the brake pedal position and free play .................................................6-17 adjusting the clutch lever free play .........6-15 adjusting the drive chain slack .............
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Yamaha motor espaÑa, s.A. Printed in spain 2004-07-bengar gràfiques, s.L. (e) 1d0-f8199-e2.Qxd 20/9/04 11:32 página 74.