Yamaha a reputation for dependability. Please take the time to read this manual thoroughly, so as to enjoy all advantages of your YBR125. 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.
This manual should be considered a permanent part of this motorcycle and should remain with it even if the motorcycle is subsequently sold. 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.
TABLE OF CONTENTS SAFETY INFORMATION ....1-1 PRE-OPERATION CHECKS ..... 4-1 Checking the front brake lever free Pre-operation check list ....4-2 play ........... 6-17 DESCRIPTION ........2-1 Adjusting the brake pedal free Left view ..........2-1 OPERATION AND IMPORTANT play ........... 6-17 Right view ........2-2 RIDING POINTS.........
TABLE OF CONTENTS Replacing the fuse ......6-28 Replacing the headlight bulb ..6-29 Replacing the tail/brake light bulb ...........6-30 Replacing a turn signal light bulb ...........6-31 Replacing the auxiliary light bulb ...........6-31 Front wheel ........6-32 Rear wheel ........6-34 Troubleshooting ......6-36 Troubleshooting chart ....6-37 MOTORCYCLE CARE AND STORAGE ..........7-1 Matte color caution ......7-1...
SAFETY INFORMATION EAU10281 AND/OR WHEN MADE NECES- • Ride where other motorists can SARY BY MECHANICAL CONDI- see you. Avoid riding in another MOTORCYCLES SINGLE TIONS. motorist’s blind spot. TRACK VEHICLES. THEIR SAFE USE Many accidents involve inexperi- AND OPERATION ARE DEPENDENT Safe riding enced operators.
Modifications made to this motorcycle other motorists can see you. the single most critical factor in the pre- not approved by Yamaha, or the re- The posture of the operator and vention or reduction of head injuries. moval of original equipment, may ren- passenger is important for proper Always wear an approved helmet.
Maximum load: been specifically designed for use on create instability due to improper 190 kg (419 lb) this motorcycle. Since Yamaha cannot weight distribution or aerody- test all other accessories that may be namic changes. If accessories When loading within this weight limit,...
SAFETY INFORMATION tor and may limit control ability, Always turn the engine off before or clothing, immediately wash the therefore, such accessories are leaving the motorcycle unattended affected area with soap and water not recommended. and remove the key from the main and change your clothes.
INSTRUMENT AND CONTROL FUNCTIONS EAU10460 EAU10660 To unlock the steering Main switch/steering lock All electrical systems are off. The key can be removed. EAU43140 LOCK The steering is locked, and all electrical systems are off. The key can be re- moved.
This warning light comes on or flashes when an electrical circuit monitoring the engine is defective. When this occurs, have a Yamaha dealer check the self- diagnosis system. (See page 3-3 for an 1. Turn signal indicator light “ ”...
ECA11170 CAUTION: To prevent engine damage, be sure 1. Tachometer 1. Fuel gauge to consult a Yamaha dealer as soon 2. Tachometer red zone 2. Red zone as possible if this occurs. The electric tachometer allows the rider The fuel gauge indicates the amount of to monitor the engine speed and keep it fuel in the fuel tank.
INSTRUMENT AND CONTROL FUNCTIONS EAU12347 EAU12400 EAU41700 Handlebar switches Dimmer switch “ ” The engine trouble warning light will Set this switch to “ ” for the high come on when the key is turned to “ON” Left beam and to “ ”...
INSTRUMENT AND CONTROL FUNCTIONS EAU12820 EAU12870 EAU12890 Clutch lever Shift pedal Brake lever 1. Clutch lever 1. Shift pedal 1. Brake lever The clutch lever is located at the left The shift pedal is located on the left The brake lever is located at the right handlebar grip.
INSTRUMENT AND CONTROL FUNCTIONS EAU12941 EAU13001 Brake pedal Fuel tank cap NOTE: The fuel tank cap cannot be installed unless the key is in the lock. In addition, the key cannot be removed if the cap is not properly installed and locked. EWA11140 WARNING Make sure that the fuel tank cap is...
INSTRUMENT AND CONTROL FUNCTIONS EAU13443 EAU43150 EAU14880 Catalytic converters Kickstarter Adjusting the shock absorber This vehicle is equipped with catalytic assemblies converters in the exhaust system. EWA10860 WARNING The exhaust system is hot after op- eration. Make sure that the exhaust system has cooled down before do- ing any maintenance work.
INSTRUMENT AND CONTROL FUNCTIONS below and have a Yamaha dealer re- EAU43161 Ignition circuit cut-off system pair it if it does not function proper- The ignition circuit cut-off system (com- prising the sidestand switch, clutch switch and neutral switch) has the fol- lowing functions.
4. Push the start switch or 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: 5. Move the sidestand up. 6. Keep the clutch lever pulled.
PRE-OPERATION CHECKS EAU15593 The condition of a vehicle is the owner’s responsibility. Vital components 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 serious consequences.
• Make sure that operation is smooth. • Check cable free play. Throttle grip 6-12, 6-23 • If necessary, have Yamaha dealer adjust cable free play and lubricate cable and grip housing. • Make sure that operation is smooth. Control cables 6-23 •...
Chassis fasteners — • Tighten if necessary. Instruments, lights, signals • Check operation. — and switches • Correct if necessary. • Check operation of ignition circuit cut-off system. Sidestand switch • If system is defective, have Yamaha dealer check vehicle.
When the transmission is in the neutral ground and distract the opera- position, the neutral indicator light tor, resulting in a possible loss should be on, otherwise have a of control. Yamaha dealer check the electrical cir- cuit.
To shift the transmission into the neu- after starting, immediately stop the tral position, press the shift pedal down engine, and have a Yamaha dealer repeatedly until it reaches the end of its check the self-diagnosis system. travel, and then slightly raise it.
OPERATION AND IMPORTANT RIDING POINTS ECA10260 EAU16810 EAU16830 Tips for reducing fuel con- Engine break-in CAUTION: sumption There is never a more important period Even with the transmission in in the life of your engine than the period Fuel consumption depends largely on the neutral position, do not between 0 and 1000 km (600 mi).
Never park in an area where there If any engine trouble should oc- are fire hazards such as grass or cur during the engine break-in other flammable materials. period, immediately have a Yamaha dealer check the vehi- cle.
If you are not familiar with mainte- certain maintenance work correctly. nance work, have a Yamaha dealer do it for you. NOTE: If you do not have the tools or experi- ence required for a particular job, have a Yamaha dealer perform it for you.
From 30000 km (17500 mi), repeat the maintenance intervals starting from 6000 km (3500 mi). Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills.
PERIODIC MAINTENANCE AND MINOR REPAIR ODOMETER READING ANNUAL ITEM CHECK OR MAINTENANCE JOB 1000 km 6000 km 12000 km 18000 km 24000 km CHECK (600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi) • Check operation and adjust brake √...
PERIODIC MAINTENANCE AND MINOR REPAIR ODOMETER READING ANNUAL ITEM CHECK OR MAINTENANCE JOB 1000 km 6000 km 12000 km 18000 km 24000 km CHECK (600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi) • Make sure that all nuts, bolts and √...
PERIODIC MAINTENANCE AND MINOR REPAIR ODOMETER READING ANNUAL ITEM CHECK OR MAINTENANCE JOB 1000 km 6000 km 12000 km 18000 km 24000 km CHECK (600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi) • Check operation and free play. •...
PERIODIC MAINTENANCE AND MINOR REPAIR EAU18771 2. Pull the front of the panel out with Removing and installing pan- the key inserted in the lock, and then slide the panel forward to re- The panels shown need to be removed lease it in the rear.
PERIODIC MAINTENANCE AND MINOR REPAIR 2. While pushing the panel inward, EAU19603 Checking the spark plug turn the key counterclockwise to The spark plug is an important engine the original position, remove it, and component, which is easy to check. then close the panel lock cover.
4. Install the spark plug cap. ferent color, the engine could be oper- ating improperly. Do not attempt to diagnose such problems yourself. In- 1. Spark plug gap stead, have a Yamaha dealer check the vehicle. Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)
PERIODIC MAINTENANCE AND MINOR REPAIR EAU37171 4. If the engine oil is at or below the Engine oil minimum level mark, add sufficient The engine oil level should be checked oil of the recommended type to before each ride. In addition, the oil raise it to the correct level.
PERIODIC MAINTENANCE AND MINOR REPAIR 4. Install the engine oil drain bolt, and Make sure that no foreign mate- EAU37121 Cleaning the air filter element then tighten it to the specified rial enters the crankcase. The air filter element should be cleaned torque.
PERIODIC MAINTENANCE AND MINOR REPAIR EWA10430 WARNING Use only a dedicated parts cleaning solvent. To avoid the risk of fire or explosion, do not use gasoline or solvents with a low flash point. ECA15100 CAUTION: To avoid damaging the sponge ma- 1.
(b). from occurring, the valve clearance regarding the specified tires. 3. Tighten the locknut. must be adjusted by a Yamaha dealer at the intervals specified in the periodic Tire air pressure maintenance and lubrication chart. The tire air pressure should be checked and, if necessary, adjusted before each ride.
WARNING glass fragments in it, or if the sidewall is Because loading has an enormous cracked, have a Yamaha dealer re- impact on the handling, braking, place the tire immediately. performance and safety characteris- tics of your motorcycle, you should...
PERIODIC MAINTENANCE AND MINOR REPAIR EAU22032 3. If the specified clutch lever free 7. Tighten both locknuts. Adjusting the clutch lever free play could be obtained as de- play scribed above, tighten the locknut and skip the rest of the procedure, otherwise, proceed as follows.
Adjusting the rear brake light The operation of the shift pedal should switch be checked before each ride. If opera- tion is not smooth, have a Yamaha dealer check the vehicle. 1. Rear brake light switch 2. Rear brake light switch adjusting nut...
Brake fluid may deteriorate paint- EAU22720 Changing the brake fluid make sure that the top of the mas- ed surfaces or plastic parts. Al- Have a Yamaha dealer change the ter cylinder is level by turning the ways clean spilled...
PERIODIC MAINTENANCE AND MINOR REPAIR EAU22760 3. To tighten the drive chain, turn the Drive chain slack: Drive chain slack adjusting bolt at each end of the 20.0–30.0 mm (0.79–1.18 in) The drive chain slack should be swingarm in direction (a). To loos- checked before each ride and adjusted 5.
PERIODIC MAINTENANCE AND MINOR REPAIR ECA10570 EAU23022 ECA11110 Cleaning and lubricating the CAUTION: CAUTION: drive chain Improper drive chain slack will over- Do not use engine oil or any other lu- The drive chain must be cleaned and load the engine as well as other vital bricants for the drive chain, as they lubricated at the intervals specified in parts of the motorcycle and can lead...
Recommended lubricant: EWA10740 Lithium-soap-based grease WARNING If the centerstand or sidestand does not move up and down smoothly, have a Yamaha dealer check or re- pair it. Recommended lubricant: Lithium-soap-based grease 6-24...
If any damage is found or the front Check the inner tubes for scratches, fork does not operate smoothly, damage and excessive oil leakage. have a Yamaha dealer check or re- pair it. To check the operation 1. Place the vehicle on a level sur- face and hold it in an upright posi- tion.
To charge the battery burns. Avoid any contact with Have a Yamaha dealer charge the bat- skin, eyes or clothing and al- tery as soon as possible if it seems to ways shield your eyes when have discharged.
Using a conventional battery charger will damage the battery. If you do not have access to a sealed-type (MF) battery charg- er, have a Yamaha dealer charge your battery. 1. Starter relay coupler 1. Starter relay 2. Starter relay holder 3.
1. Headlight bulb socket cover 4. If the fuse immediately blows 3. Remove the headlight bulb socket again, have a Yamaha dealer (together with the bulb) by turning check the electrical system. it counterclockwise. 1. Screw 2.
PERIODIC MAINTENANCE AND MINOR REPAIR EAU24202 EAU37270 Replacing a turn signal light Replacing the auxiliary light bulb bulb 1. Remove the turn signal light lens If the auxiliary light bulb burns out, re- by removing the screw. place it as follows. 1.
EAU37041 To remove the front wheel EWA10820 WARNING It is advisable to have a Yamaha dealer service the wheel. Securely support the motor- cycle so that there is no danger 1. Auxiliary light bulb socket of it falling over.
PERIODIC MAINTENANCE AND MINOR REPAIR 1. Rubber cap 1. Speedometer gear unit 1. Speedometer gear unit retainer 2. Wheel axle 2. Lift the wheel up between the fork 3. Insert the wheel axle, making sure 3. Washer legs. the washer on the left side is in- 5.
To remove the rear wheel smoothly. EWA10820 WARNING 7. Connect the speedometer cable. It is advisable to have a Yamaha dealer service the wheel. Securely support the motor- cycle so that there is no danger 1. Axle nut of it falling over.
PERIODIC MAINTENANCE AND MINOR REPAIR 6. Remove the axle nut, and then pull 7. Take the motorcycle off the center- the wheel axle out. stand so that the rear wheel is on 7. Push the wheel forward, and then the ground. remove the drive chain from the 8.
Rust and corrosion can develop matte colored finished parts. Be Cleaning even if high-quality components are sure to consult a Yamaha dealer for ECA10771 advice on what products to use be- used. A rusty exhaust pipe may go un- CAUTION: fore cleaning the vehicle.
MOTORCYCLE CARE AND STORAGE contact with strong or abrasive scratched, use a quality plastic 1. Clean the motorcycle with cold wa- cleaning products, solvent or polishing compound after ter and a mild detergent, after the thinner, fuel (gasoline), rust re- washing.
WARNING NOTE: To prevent corrosion, avoid Make sure that there is no oil or Consult a Yamaha dealer for advice on damp cellars, stables (because what products to use. wax on the brakes or tires. of the presence of ammonia)
MOTORCYCLE CARE AND STORAGE 3. Perform the following steps to pro- 4. Lubricate all control cables and the tect the cylinder, piston rings, etc. pivoting points of all levers and from corrosion. pedals as well as of the side- a. Remove the spark plug cap stand/centerstand.
Record the key identification number, vehicle identification number and mod- el label information in the spaces pro- vided below for assistance when ordering spare parts from a Yamaha dealer or for reference in case the vehi- cle is stolen. KEY IDENTIFICATION NUMBER: 1.
1. Model label The model label is affixed to the frame behind panel A. (See page 6-6.) Record the information on this label in the space provided. This information will be needed when ordering spare parts from a Yamaha dealer.
INDEX Air filter element, cleaning ....6-10 Front brake lever free play, checking ..6-17 Rear brake light switch, adjusting ..6-18 Auxiliary light bulb, replacing ....6-31 Front fork, checking.......6-25 Fuel ............3-7 Safety information........1-1 Fuel consumption, tips for reducing ..5-3 Battery ..........