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INTRODUCTION EAU10070 Congratulations on your purchase of the Yamaha YJ50R. This model is the result of Yamaha’s vast experience in the pro- duction of fine sporting, touring, and pacesetting racing machines. It represents the high degree of craftsmanship and reli- ability that have made Yamaha a leader in these fields.
This manual should be considered a permanent part of this scooter and should remain with it even if the scooter is sub- sequently 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 scooter and this manual.
Front brake lever ......3-4 Checking the spark plug ....6-5 Scooter noise regulation ....9-4 Rear brake lever ......3-5 Final transmission oil ....... 6-7 YAMAHA MOTOR CORPORATION, Fuel tank cap ........3-5 Cleaning the air filter sponge U.S.A. RIVA LIMITED Fuel ..........3-6 material ........
SAFETY INFORMATION SARY BY MECHANICAL CONDI- see you. Avoid riding in another EAU10240 SCOOTERS ARE SINGLE TRACK TIONS. motorist’s blind spot. VEHICLES. THEIR SAFE USE AND Safe riding Many accidents involve inexperi- OPERATION DEPENDENT Always make pre-operation enced operators. In fact, many op- UPON PROPER checks.
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Cargo accessory weight accidents are the result of head inju- approved by Yamaha, or the removal of should be kept as low and close to ries. The use of a safety helmet is the original equipment, may render the the scooter as possible. Make sure...
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Since Yamaha cannot test front fork area, they must be as could cause a dangerous loss of all other accessories that may be avail- lightweight as possible and lights or engine power.
SAFETY INFORMATION Never start the engine or let it run If you should swallow any gaso- EAU10350 Further safe-riding points for any length of time in a closed line, inhale a lot of gasoline vapor, Make sure to signal clearly when area.
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SAFETY INFORMATION Slow down as you approach a cor- A loose load will affect the stability ner or turn. Once you have com- of the scooter and could divert pleted a turn, accelerate slowly. your attention from the road. (See Be careful when passing parked page 1-1.) cars.
SAFETY INFORMATION EAU10381 Location of important labels Please read the following important labels carefully before operating this vehicle.
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SAFETY INFORMATION WARNING BEFORE YOU OPERATE THIS VEHICLE, READ Cold tire normal pressure should be set as THE OWNER’S MANUAL AND ALL LABELS. follows. NEVER CARRY A PASSENGER. you increase your FRONT : 150 kPa,{1.50 kgf/cm }, 22 psi risk of losing control if you carry a passenger. REAR 175 kPa,{1.75 kgf/cm }, 25 psi...
DESCRIPTION EAU10410 Left view 1. Front wheel 2. Front turn signal light 3. Rear turn signal light 4. Rear wheel 5. Kickstarter (page 3-8) 6. Air filter sponge material (page 6-8) 7. Battery (page 6-14)
INSTRUMENT AND CONTROL FUNCTIONS sition, and then turn it to “LOCK” EAU10460 EAU10660 Main switch/steering lock while still pushing it. All electrical systems are off. The key 2. Remove the key. can be removed. To unlock the steering EAU10670 The 2-stroke engine oil level warning LOCK light should come on.
Turn signal indicator light “ ” after the 2-stroke engine oil tank has This indicator light flashes when the been refilled, have a Yamaha dealer turn signal switch is pushed to the left or check the electrical circuit. right. ECA12720...
INSTRUMENT AND CONTROL FUNCTIONS Right EAU12500 EAU12900 Horn switch “ ” Front brake lever Press this switch to sound the horn. EAU12660 Engine stop switch “ ” Set this switch to “ ” before starting the engine. Set this switch to “ ”...
INSTRUMENT AND CONTROL FUNCTIONS To install the fuel tank cap EAU12950 EAU32482 Rear brake lever Fuel tank cap 1. Match marks 1. Rear brake lever 1. Fuel tank cap lock cover 1. Insert the fuel tank cap into the 2. Unlock. The rear brake lever is located on the tank opening with the key inserted To remove the fuel tank cap...
Recommended fuel: UNLEADED GASOLINE ONLY Fuel tank capacity: 6.0 L (1.59 US gal) (1.32 Imp.gal) Your Yamaha engine has been de- signed to use regular unleaded gaso- line with a pump octane number 1. Fuel tank filler tube [(R+M)/2] of 86 or higher, or a research 2.
INSTRUMENT AND CONTROL FUNCTIONS cause damage to the fuel system or ve- EAU13540 2-stroke engine oil Recommended oil: hicle performance problems. See page 8-1. Make sure that there is sufficient oil in Oil quantity: the 2-stroke engine oil tank. If neces- 1.4 L (1.48 US qt) (1.23 Imp.qt) sary, add the recommended 2-stroke 3.
INSTRUMENT AND CONTROL FUNCTIONS EAU13680 EAU13890 EAU14300 Kickstarter Seat Helmet holder To open the seat 1. Insert the key in the lock, and then turn it as shown. 1. Kickstarter 1. Helmet holder To start the engine, fold out the kick- The helmet holder is located under the starter lever, move it down lightly with seat.
INSTRUMENT AND CONTROL FUNCTIONS To release the helmet from the hel- ment. EAU14510 Storage compartment met holder Since the storage compartment Open the seat, remove the helmet from accumulates heat when ex- the helmet holder, and then close the posed to the sun, do not store seat.
INSTRUMENT AND CONTROL FUNCTIONS of their size or shape. EAU15110 Carrier Do not leave your scooter unat- tended with the seat open. 1. Carrier EWA10170 WARNING Do not exceed the load limit of 3 kg (7 lb) for the carrier. Do not exceed the maximum load of 75 kg (165 lb) for the ve- hicle.
PRE-OPERATION CHECKS EAU15591 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 6-10, 6-13 If necessary, have Yamaha dealer adjust cable free play and lubricate cable and grip housing. Check for damage. Check tire condition and tread depth. Wheels and tires 6-10 Check air pressure.
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PRE-OPERATION CHECKS ITEM CHECKS PAGE Instruments, lights, signals Check operation. — and switches Correct if necessary.
CAUTION: their functions before riding. See page 5-4 for engine break-in in- Consult a Yamaha dealer re- structions prior to operating the ve- garding any control or function hicle for the first time. that you do not thoroughly un- derstand.
OPERATION AND IMPORTANT RIDING POINTS not start with the starter motor, try using EAU16770 EAU16780 Starting off Acceleration and deceleration the kickstarter. NOTE: ECA11130 Before starting off, allow the engine to CAUTION: warm up. For maximum engine life, always warm the engine up before starting 1.
OPERATION AND IMPORTANT RIDING POINTS Rear ing downhill can be very diffi- EAU16791 Braking cult. 1. Close the throttle completely. 2. Apply both front and rear brakes simultaneously while gradually in- creasing the pressure. Front EWA10300 WARNING Avoid braking hard or suddenly (especially when leaning over to one side), otherwise the scooter may skid or overturn.
CAUTION: If any engine trouble should occur EAU17160 during the engine break-in period, 0–150 km (0–90 mi) immediately have a Yamaha dealer Avoid prolonged operation above check the vehicle. 1/3 throttle. After every hour of operation, stop the engine, and then let it cool for five to ten minutes.
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OPERATION AND IMPORTANT RIDING POINTS park in a place where pedestri- ans or children are not likely to touch them. Do not park on a slope or on soft ground, otherwise the vehicle may overturn. ECA10380 CAUTION: Never park in an area where there are fire hazards such as grass or other flammable materials.
The most important points of ve- hicle inspection, adjustment, lubrication are explained on the follow- ing pages. EWA10320 WARNING If you are not familiar with mainte- nance work, have a Yamaha dealer do it for you.
From 6000 mi (9000 km) or 18 months, repeat the maintenance intervals starting from 2000 mi (3000 km) or 6 months. Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills.
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Make sure that all nuts, bolts and screws are properly tight- √ √ √ 15 * Chassis fasteners ened. Apply Yamaha chain and cable lube or engine oil 10W-30 thor- √ √ √ 16 * Control and meter cables oughly.
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PERIODIC MAINTENANCE AND MINOR REPAIR EAU18690 NOTE: The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
2. Remove the screws, and then pull Place the panel in the original position, 2. Remove the spark plug as shown, the panel off as shown. and then install the screws. with a spark plug wrench available at a Yamaha dealer.
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Do not attempt to diagnose such Spark plug gap: problems yourself. Instead, have a 0.6–0.7 mm (0.024–0.028 in) Yamaha dealer check the vehicle. 2. Clean the surface of the spark plug gasket and its mating surface, and 2. Check the spark plug for electrode...
0.10 L (0.11 US qt) (0.09 Imp.qt) ride. If any leakage is found, have a EWA11310 Yamaha dealer check and repair the WARNING scooter. In addition, the final transmis- Make sure that no foreign mate-...
PERIODIC MAINTENANCE AND MINOR REPAIR EAU21102 Cleaning the air filter sponge material The air filter sponge material should be cleaned at the intervals specified in the periodic maintenance and lubrication chart. Clean the air filter sponge mate- rial more frequently if you are riding in unusually wet or dusty areas.
7. Install the panel. sponge material, then squeeze the excess oil out. NOTE: The air filter sponge material should be wet but not dripping. Recommended oil: Yamaha foam air filter oil or other quality air filter oil...
Periodically check the The tire air pressure should be checked throttle cable free play and, if neces- and, if necessary, adjusted before each sary, have a Yamaha dealer adjust it. ride. EWA10540 WARNING Because loading has an enormous...
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(minimum tread depth), if the which could result in tube dam- have a Yamaha dealer replace tire has a nail or glass fragments in it, or age. The scooter could also eas- the tire immediately.
The front and rear brake lever free play should be measured at the positions as If proper adjustment cannot be ob- shown. tained as described, have a Yamaha dealer make this adjustment. Front brake lever free play: 10.0–20.0 mm (0.39–0.79 in) Rear brake lever free play: 10.0–20.0 mm (0.39–0.79 in)
PERIODIC MAINTENANCE AND MINOR REPAIR Yamaha dealer replace the brake EAU22361 EAU23110 Checking the front and rear Checking and lubricating the shoes as a set. brake shoes throttle grip and cable The operation of the throttle grip should be checked before each ride. In addi-...
This model is equipped with a phisticated component of the engine, sealed-type (MF) battery, which does which must be adjusted by a Yamaha not require any maintenance. There is dealer at the intervals specified in the no need to check the electrolyte or to periodic maintenance and lubrication add distilled water.
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To charge the battery 1. Battery box cover Using a conventional battery Have a Yamaha dealer charge the bat- 2. Screw charger will damage the battery. tery as soon as possible if it seems to 1.
1. Fuse self. However, should your scooter re- The fuse is located inside the battery quire any repair, take it to a Yamaha lead coupler. dealer, whose skilled technicians have If the fuse is blown, replace it as fol- the necessary tools, experience, and lows.
Remove the spark plug and check the electrodes. The engine does not start. Have a Yamaha dealer check the vehicle. Check the battery. 4. Battery The engine turns over The battery is good.
SCOOTER CARE AND STORAGE brush, but never apply such prod- contact with strong or abrasive EAU26090 Care ucts onto seals, gaskets and wheel cleaning products, solvent or While the open design of a scooter re- axles. Always rinse the dirt and de- thinner, fuel (gasoline), rust re- veals the attractiveness of the technol- greaser off with water.
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SCOOTER CARE AND STORAGE scratched, use a quality plastic gine has cooled down. er to remove any remaining dirt. polishing compound after 5. Touch up minor paint damage ECA10790 CAUTION: washing. caused by stones, etc. Do not use warm water since it in- 6.
4. Perform the following steps to pro- ECA10820 NOTE: tect the cylinder, piston rings, etc. CAUTION: Consult a Yamaha dealer for advice on from corrosion. Storing the scooter in a poorly what products to use. a. Remove the spark plug cap ventilated room or covering it and spark plug.
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SCOOTER CARE AND STORAGE [less than 0 °C (30 °F) or more EWA10950 WARNING than 30 °C (90 °F)]. For more in- To prevent damage or injury from formation on storing the battery, sparking, make sure to ground the see page 6-14. spark plug electrodes while turning NOTE: the engine over.
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.
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1. Model label The model label is affixed to the inside of the storage compartment. (See page 3-9.) Record the information on this label in the space provided. This in- formation will be needed when ordering spare parts from a Yamaha dealer.
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addition to notifying Yamaha Motor Corporation, U.S.A. If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety defect exists in a group of vehicles, it may order a recall and remedy campaign.
CONSUMER INFORMATION EAU26580 Scooter noise regulation TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED: Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering inoperative by any person other than for purposes of maintenance, repair, or replacement of any device or element of design incorporated into any new ve- hicle for the purpose of noise control prior to its sale or delivery to the ultimate purchaser or while it is in use or (2) the use of the vehicle after such device or element of design has been removed or rendered inoperative by any person.
This excellent Y.E.S. plan coverage is only available to dealer to see how comforting uninterrupted factory- Yamaha owners like you, and only while your Yamaha is still backed protection can be. within the Yamaha Limited Warranty period. So visit your authorized Yamaha dealer to get all the facts.
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Yamaha Limited Warranty expires. A special note: If visiting your dealer isn’t convenient, contact Yamaha with your Primary ID number (your frame number). We’ll be happy to help you get the Y.E.S. coverage you need.
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INDEX High beam indicator light ......3-2 Horn switch ..........3-4 2-stroke engine oil........3-7 Throttle cable free play, adjusting ... 6-10 Throttle grip and cable, checking and Identification numbers........9-1 lubricating..........6-13 Acceleration and deceleration....5-2 Indicator and warning lights .......3-2 Tires ............6-10 Air filter sponge material, cleaning....
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YAMAHA MOTOR CO., LTD. PRINTED IN JAPAN PRINTED ON RECYCLED PAPER PRINTED IN JAPAN 2004.5–0.7×1 ! 2002·5–0.6×1(E)