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OWNER’S MANUAL YZF-R125 MOTORCYCLE Read this manual carefully before oper- ating this vehicle. YZF125-A B5G-F8199-E1...
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EAU46094 Read this manual carefully before operating this vehicle. This manual should stay with this vehicle if it is sold.
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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! Yamaha continually seeks advancements in product design and quality. There-...
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Important manual information EAU63350 Particularly important information is distinguished in this manual by the following notations: This is the safety alert symbol. It is used to alert you to potential personal injury haz- ards. Obey all safety messages that follow this symbol to avoid possible injury or death.
Table of contents Safety information ......1-1 Checking the spark plug....6-9 Engine oil and oil filter element ..6-10 Description ........2-1 Why Yamalube......6-12 Left view ..........2-1 Coolant ......... 6-13 Right view........2-2 Replacing the air filter element Controls and instruments....2-3 and cleaning the check hose..
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Table of contents Replacing a turn signal light bulb ........... 6-35 Replacing the license plate light bulb ........... 6-35 Supporting the motorcycle... 6-36 Troubleshooting......6-36 Troubleshooting chart ....6-37 Motorcycle care and storage..7-1 Matte color caution ......7-1 Care ..........7-1 Storage ...........
Safety information an accident or equipment damage. EAU1028C See page 4-1 for a list of pre-operation checks. Be a Responsible Owner This motorcycle is designed to As the vehicle’s owner, you are re- carry the operator and a passen- sponsible for the safe and proper oper- ger.
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Safety information Many accidents involve inexperi- • The passenger should always enced operators. In fact, many op- hold onto the operator, the seat erators who have been involved in strap or grab bar, if equipped, accidents do not even have a cur- with both hands and keep both rent motorcycle license.
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Safety information extra care when riding a motorcycle Avoid Carbon Monoxide Poisoning All engine exhaust contains carbon that has added cargo or accessories. monoxide, a deadly gas. Breathing Here, along with the information about carbon monoxide can cause head- accessories below, are some general aches, dizziness, drowsiness, nausea, guidelines to follow if loading cargo to confusion, and eventually death.
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Genuine before using it to make sure that it Yamaha accessories, which are avail- does not in any way reduce able only from a Yamaha dealer, have ground clearance or cornering been designed, tested, and approved clearance, limit suspension travel, by Yamaha for use on your vehicle.
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Safety information operator and may limit control handlebars or turn signals, or ability, therefore, such accesso- parts that could break). Choose ries are not recommended. the location for the straps carefully Use caution when adding electri- so the straps will not rub against cal accessories.
Instrument and control functions EAU10462 EWA10062 Main switch/steering lock WARNING Never turn the key to “OFF” or “LOCK” while the vehicle is moving. Otherwise the electrical systems will be switched off, which may result in loss of control or an accident. EAU10696 LOCK The steering is locked and all electrical...
Instrument and control functions To unlock the steering EAU4939H Indicator lights and warning lights 1. Push. 2. Turn. ZAUM1566 1. Shift light From the “LOCK” position, push the 2. Turn signal indicator light “ ” key and turn it to “OFF”. 3.
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Do not continue to operate the en- will come on for a few seconds and gine if it is overheating. then go off. If the light does not come on, have a Yamaha dealer check the EAU11487 vehicle. Engine trouble warning light “...
Instrument and control functions For the UK: To switch between ki- EAUM4010 Multi-function meter unit lometers and miles, press and hold the “SELECT” button. Speedometer ZAUM1567 1. “SELECT” button 2. “RESET” button EWA12423 WARNING ZAUM1568 Be sure to stop the vehicle before 1.
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If this occurs, have a within the ideal power range. Yamaha dealer check the vehicle. ECA23050 NOTICE Do not operate the engine in the ta- chometer high-r/min zone. High-r/min zone: 11000 r/min and...
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Instrument and control functions Push the “SELECT” button to switch Transmission gear display the display between the odometer mode “ODO”, tripmeters mode “TRIP 1” and “TRIP 2”, instantaneous fuel consumption mode “km/L” or “L/100 km”, average fuel consumption mode “AVE_ _._ km/L” or “AVE_ _._ L/100 km”...
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Instrument and control functions tween the various tripmeter, odometer, Tripmeters mode instantaneous fuel consumption, aver- age fuel consumption, and average speed modes in the following order: TRIP F → km/L or L/100 km → AVE_ _._ km/L or AVE_ _._ L/100 km → AVE_ _._ km/h →...
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Instrument and control functions The instantaneous fuel consumption The average fuel consumption can be can be set to either “km/L”, “L/100 km” set to either “AVE_ _._ km/L”, “AVE_ or “MPG” (for the UK). _._ L/100 km” or “AVE_ _ _._ MPG” (for To switch the instantaneous fuel con- the UK).
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Instrument and control functions Shift timing light activation point: Average speed mode this function allows you to select the engine speed at which the in- dicator light is activated. Shift timing light deactivation point: this function allows you to select the engine speed at which the indicator light is deactivated.
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Instrument and control functions Flash: indicator light To set the shift deactivation point flashes when activated. (This setting is selected when the The shift timing indicator light de- indicator light flashes four activation point can be set be- times per second.) tween 9000 r/min and 13000 ...
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If the display indicates any error codes, note the code number, and then have a Yamaha dealer check the vehicle. ZAUM1581 ECA11591 NOTICE 1. Hyphen 2.
Instrument and control functions EAU1234M EAU12461 Handlebar switches Turn signal switch “ ” To signal a right-hand turn, push this Left switch to “ ”. To signal a left-hand turn, push this switch to “ ”. When released, the switch returns to the cen- ter position.
Instrument and control functions EAU12823 EAU12876 Clutch lever Shift pedal ZAUM1585 ZAUM1586 1. Clutch lever 1. Shift pedal To disengage the drivetrain from the The shift pedal is located on the left engine, such as when shifting gears, side of the motorcycle. To shift the pull the clutch lever toward to the han- transmission to a higher gear, move dlebar.
Instrument and control functions EAU12892 EAU12944 Brake lever Brake pedal ZAUM1587 ZAUM1588 1. Brake lever 1. Brake pedal The brake lever is located on the right The brake pedal is located on the right side of the handlebar. To apply the side of the motorcycle.
Instrument and control functions This ABS has a test mode which EAU63040 allows the owner to experience The Yamaha ABS (Anti-lock Brake the pulsation at the brake lever or System) features a dual electronic con- brake pedal when the ABS is op- trol system, which acts on the front and erating.
Instrument and control functions EAU13077 EAU13213 Fuel tank cap Fuel Make sure there is sufficient gasoline in the tank. EWA10882 WARNING Gasoline and gasoline vapors are extremely flammable. To avoid fires and explosions and to reduce the risk of injury when refueling, follow these instructions.
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Gasohol EAU86072 There are two types of gasohol: gaso- Your Yamaha engine was designed to hol containing ethanol and that con- use unleaded gasoline with a research taining methanol. Gasohol containing octane number of 95 or higher. If en-...
Instrument and control functions EAU58301 EAU13435 Fuel tank overflow hose Catalytic converter The exhaust system contains catalytic converter(s) to reduce harmful exhaust emissions. EWA10863 WARNING The exhaust system is hot after op- eration. To prevent a fire hazard or burns: ...
Instrument and control functions EAUE3431 Seats Passenger seat To remove the passenger seat 1. Remove the plastic cover. ZAUE3365 1. Projection 2. Seat holder 2. Install the passenger seat by in- stalling and tightening the nut to the specified torque. ZAUE3363 Tightening torque: 1.
Instrument and control functions EAU83150 Ignition circuit cut-off system This system prevents in-gear engine starts unless the clutch lever is pulled and the sidestand is up. Also, it will stop the running engine should the sidestand be lowered while the trans- mission is in gear.
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5. Push the start switch. Does the engine start? The neutral switch may not be working. The motorcycle should not be ridden until checked by a Yamaha dealer. With the engine still running: 6. Move the sidestand up. 7. Pull the clutch lever.
Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures provided in this manual, have the vehicle inspected by a Yamaha dealer. Before using this vehicle, check the following points:...
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• Tighten if necessary. Instruments, lights, • Check operation. — signals and switches • Correct if necessary. • Check operation of ignition circuit cut-off system. Sidestand switch • If system is not working correctly, have Yamaha dealer 3-20 check vehicle.
If any engine trouble should oc- ver is pulled. cur during the engine break-in period, immediately have a To start the engine Yamaha dealer check the vehi- 1. Turn the main switch on and set cle. the engine stop switch to the run position.
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Operation and important riding points ECA11043 EAU45312 NOTICE For maximum engine life, never ac- celerate hard when the engine is This model is equipped with a lean an- cold! gle sensor to stop the engine in case of a turnover. In this case, turn the main switch off and then on.
Operation and important riding points EAU16674 and drive train, which are not Shifting designed withstand shock of forced shifting. EAU85370 To start out and accelerate 1. Pull the clutch lever to disengage the clutch. 2. Shift the transmission into first gear.
Operation and important riding points The neutral indicator light should EAU16811 Tips for reducing fuel con- come on and then the clutch lever sumption can be released. Fuel consumption depends largely on EWA17380 WARNING your riding style. Consider the follow- ing tips to reduce fuel consumption: ...
Operation and important riding points EAU17214 Parking When parking, stop the engine, and then remove the key from the main switch. EWA10312 WARNING 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 and be burned.
However, a torque wrench and other tools are necessary to perform certain maintenance work correctly. If you do not have the tools or experi- ence required for a particular job, have your 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. EAU71060...
X 1000 mi 10.5 14 • Perform dynamic inspection us- Diagnostic system √ √ √ √ √ √ ing Yamaha diagnostic tool. check • Check the error codes. √ √ 2 * Air filter element • Replace. Air filter case √ √...
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Periodic maintenance and adjustment ODOMETER CHECK OR READING MAINTENANCE JOB ITEM X 1000 km X 1000 mi 10.5 14 • Check chain slack, alignment Every 1000 km (600 mi) and af- and condition. ter washing the motorcycle, rid- Drive chain •...
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Periodic maintenance and adjustment ODOMETER CHECK OR READING MAINTENANCE JOB ITEM X 1000 km X 1000 mi 10.5 14 Engine oil filter el- √ √ √ √ √ • Replace. ement • Check coolant level and vehicle √ √ √ √...
Periodic maintenance and adjustment EAU18782 Removing and installing cowl- The quick fastener is removed by ings pushing the center pin in with a screw- The cowlings shown need to be re- driver, then pulling the fastener out. moved to perform some of the mainte- nance jobs described in this chapter.
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Periodic maintenance and adjustment To install the cowling 1. Place the cowling in the original position, and then install the screws and quick fastener. 2. Install the cowling B. (See page 6-7.) ZAUM1618 1. Screw 2. Quick fastener 3. Cowling B 4.
Do not attempt to diagnose such problems Tightening torque: Spark plug: yourself. Instead, have a Yamaha deal- 12.5 N·m (1.25 kgf·m, 9.22 lb·ft) er check the vehicle. If the spark plug shows signs of elec- trode erosion and excessive carbon or other deposits, it should be replaced.
Periodic maintenance and adjustment EAUM4051 Engine oil and oil filter ele- ment The engine oil level should be checked before each ride. In addition, the oil must be changed and the oil filter ele- ment replaced at the intervals specified in the periodic maintenance and lubri- cation chart.
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Periodic maintenance and adjustment ZAUE0672 1. Engine oil drain bolt 1. Oil filter element 2. O-ring 2. O-ring 3. Compression spring 8. Install the oil filter element cover 4. Strainer by installing the bolts, then tight- 5. Oil pan ening them to the specified 5.
Periodic maintenance and adjustment EAU85450 Recommended engine oil: Why Yamalube See page 8-1. YAMALUBE oil is a Genuine YAMAHA Oil quantity: Part born of the engineers’ passion Oil change: and belief that engine oil is an impor- 0.85 L (0.90 US qt, 0.75 Imp.qt) With oil filter removal: tant liquid engine component.
Periodic maintenance and adjustment EAU20071 Coolant The coolant level should be checked before each ride. In addition, the cool- ant must be changed at the intervals specified in the periodic maintenance and lubrication chart. FULL EAUE3460 To check the coolant level ZAUE3384 1.
Have a Yamaha dealer replace [ECA10473] the air filter element more frequently if Coolant reservoir capacity (up to you are riding in unusually wet or dusty the maximum level mark): areas.
(a). To decrease the throt- tle grip free play, turn the adjusting If the specified idling speed cannot be nut in direction (b). obtained as described above, have a Yamaha dealer make the adjustment. 6-15...
1. Adjusting nut To prevent this from occurring, have 2. Locknut your Yamaha dealer check and adjust the valve clearance at regular intervals. 4. Tighten the locknut and then slide the rubber cover to its original po- sition.
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 side- wall is cracked, have a Yamaha dealer replace the tire immediately. 6-17...
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EWA10472 their suitability for further use. WARNING EWA16101 Have a Yamaha dealer replace WARNING excessively worn tires. Besides The front and rear tires should being illegal, operating the vehi- be of the same make and de-...
Rear tire: ride. If any damage is found, have Size: 140/70-17M/C 66S a Yamaha dealer replace the Manufacturer/model: wheel. Do not attempt even the MICHELIN PILOT STREET smallest repair to the wheel. A de-...
Periodic maintenance and adjustment EAU33893 Adjusting the clutch lever free play Measure the clutch lever free play as shown. ZAUM1598 1. Clutch lever free play adjusting nut (crank- case) 2. Locknut 3. To increase the clutch lever free play, turn the clutch lever free play ZAUM1597 1.
2.0–5.0 mm (0.08–0.20 in) 3.5–4.5 mm (0.14–0.18 in) Periodically check the brake lever free Periodically check the brake pedal free play and, if necessary, have a Yamaha play and, if necessary, have a Yamaha dealer check the brake system. dealer adjust it.
To check the brake pad wear, check the wear indicator groove. If a brake pad has worn to the point that the wear indicator groove has almost disap- peared, have a Yamaha dealer replace the brake pads as a set. 6-22...
If a brake pad has worn to the point that the wear Rear brake indicator grooves have almost disap- peared, have a Yamaha dealer replace the brake pads as a set. ZAUM1603 1. Minimum level mark...
Clean the filler cap before re- EAU22734 Changing the brake fluid moving. Use only DOT 4 brake Have a Yamaha dealer change the fluid from a sealed container. brake fluid every 2 years. In addition, Use only the specified brake flu- have the seals of the master cylinders id;...
EAU22762 EAU3431B Drive chain slack To adjust the drive chain slack Consult a Yamaha dealer before ad- The drive chain slack should be justing the drive chain slack. checked before each ride and adjusted 1. Loosen the axle nut and the lock- if necessary.
Periodic maintenance and adjustment 4. Make sure that the drive chain EAU23026 Cleaning and lubricating the pullers are in the same position, drive chain the drive chain slack is correct, The drive chain must be cleaned and drive chain moves lubricated at the intervals specified in smoothly.
Periodic maintenance and adjustment EAU44276 EAU23144 Checking and lubricating the Checking and lubricating the brake and shift pedals brake and clutch levers The operation of the brake and shift The operation of the brake and clutch pedals should be checked before each levers should be checked before each ride, and the pedal pivots should be lu- ride, and the lever pivots should be lu-...
EAU23203 EAUM1653 Checking and lubricating the Lubricating the swingarm piv- sidestand The swingarm pivots must be lubricat- ed by a Yamaha dealer at the intervals specified in the periodic maintenance and lubrication chart. Recommended lubricant: Lithium-soap-based grease ZAUM1620 The operation of the sidestand should...
If any free over. play can be felt, have a Yamaha [EWA10752] 2. While applying the front brake, dealer check or repair the steer- push down hard on the handle- ing.
5. Positive battery lead (red) hub or if the wheel does not turn The battery is located under the rider smoothly, have a Yamaha dealer seat. It is a VRLA (valve-regulated lead- check the wheel bearings. acid) battery. There is no need to check the electrolyte or to add distilled water.
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NOTICE Always keep the battery charged. To charge the battery Storing a discharged battery can Have your Yamaha dealer charge the cause permanent battery damage. battery if it seems to have discharged. Keep in mind that the battery tends to...
EAUM2415 Replacing the fuses the electrical circuit in question to check if the device operates. 4. If the fuse immediately blows again, have a Yamaha dealer check the electrical system. ZAUM1611 1. Fuse box 2. Spare fuse 3. ABS control unit fuse 4.
If a light does not come If the tail/brake light does not come on, on, check the fuse and then have a have a Yamaha dealer check it. Yamaha dealer check the vehicle. ZAUM1622 1. Auxiliary light 2.
Periodic maintenance and adjustment EAU62590 EAUM3510 Replacing a turn signal light Replacing the license plate bulb light bulb 1. Remove the turn signal light lens 1. Remove the license plate light unit by removing the screw. by removing the screw. ZAUM1621 1.
1. Maintenance stand (example) self. However, should your motorcycle Since this model is not equipped with a require any repair, take it to a Yamaha centerstand, use maintenance stands dealer, whose skilled technicians have when removing the front or rear wheel...
Check the vehicle. compression. 4. Compression The engine does not start. There is compression. Have a Yamaha dealer check the vehicle. Try starting the engine. There is no Have a Yamaha dealer check the vehicle. compression. 6-37...
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Start the engine. If the engine overheats again, The coolant level is have a Yamaha dealer check and repair the cooling system. 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.
Be of many components. Washing, clean- sure to consult a Yamaha dealer for ing, and polishing will also give you a advice on what products to use be- chance to inspect the condition of the fore cleaning the vehicle.
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Motorcycle care and storage harsh chemicals, including Washing strong acidic wheel cleaners, 1. Rinse off any degreaser and spray especially on spoke or magne- down the vehicle with a garden sium wheels. hose. Use only enough pressure harsh chemicals, abrasive to do the job.
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Motorcycle care and storage 2. For drive chain-equipped models: ECA26320 NOTICE Dry and then lubricate the drive Do not apply wax to rubber or chain to prevent rust. 3. Use a chrome polish to shine unpainted plastic parts. Do not use abrasive polishing chrome, aluminum, and stainless steel parts.
Motorcycle care and storage 5. For vehicles with a carburetor: To EAU83472 Storage prevent fuel deposits from build- Always store the vehicle in a cool, dry ing up, drain the fuel in the carbu- place. If necessary, protect it against retor float chamber into a clean dust with a porous cover.
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Motorcycle care and storage 8. Check and correct the tire air pressure, and then lift the vehicle so that all wheels are off the ground. Otherwise, turn wheels a little once a month in or- der to prevent the tires from be- coming degraded in one spot.
Specifications Dimensions: Coolant quantity: Overall length: Coolant reservoir (up to the maximum level 1990 mm (78.3 in) mark): Overall width: 0.15 L (0.16 US qt, 0.13 Imp.qt) 755 mm (29.7 in) Radiator (including all routes): Overall height: 0.49 L (0.52 US qt, 0.43 Imp.qt) 1140 mm (44.9 in) Fuel: Seat height:...
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Specifications (Total weight of rider, passenger, cargo and accessories) Front brake: Type: Hydraulic single disc brake Rear brake: Type: Hydraulic single disc brake Front suspension: Type: Telescopic fork Rear suspension: Type: Swingarm (link suspension) Electrical system: System voltage: 12 V Battery: Model: GTZ4V...
Consumer information the space provided. This information EAUM3881 Diagnostic connectors will be needed when ordering spare parts from a Yamaha dealer. ZAUM1614 1. FI diagnostic connector 2. ABS diagnostic connector The ABS and Fuel Injection diagnostic connectors are located as shown.
Privacy Policy. Privacy Policy https://www.yamaha-motor.eu/eu/ privacy/privacy-policy.aspx Yamaha will not disclose this data to a third party except in the following cas- es. In addition, Yamaha may provide vehicle data to a contractor in order to outsource services related to the han- dling of vehicle data.
Index ABS ............3-15 Handlebar switches ......3-12 ABS warning light........3-3 High beam indicator light......3-2 Air filter element and check hose, Horn switch........... 3-12 replacing and cleaning....... 6-14 Identification numbers ......9-1 Battery..........6-31 Ignition circuit cut-off system ....3-21 Brake and clutch levers, checking and Indicator lights and warning lights ..3-2 lubricating ..........
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Index Turn signal switch .........3-12 Valve clearance........6-16 Vehicle identification number ....9-1 Vehicle lights.........6-34 Wheel bearings, checking.....6-31 Wheels ..........6-19 Yamalube..........6-12 10-2...
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Original instructions MBK Industrie Z.I. de Rouvroy 02100 Saint Quentin SAS au capital de 14 000 000 € PRINTED IN FRANCE 2019.09 (E)