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OWNER’S MANUAL
YQ50 / YQ50L
5WJ-F8199-E1
INTRODUCTION
EAU10110
Welcome to the Yamaha world of motorcycling!
As the owner of the YQ50/YQ50L, 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 read this manual thoroughly, so as to enjoy all advantages of your YQ50/YQ50L. The owner’s manual does not only instruct you in how to operate, inspect and maintain your scooter, but also in how to safeguard yourself and others from trouble and injury.
In addition, the many tips given in this manual will help keep your scooter in the best possible condition. 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!
IMPORTANT MANUAL INFORMATION
EAU34110
Particularly important information is distinguished in this manual by the following notations:
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The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS |
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INVOLVED! |
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Failure to follow WARNING instructions could result in severe injury or death to the |
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WARNING |
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scooter operator, a bystander, or a person inspecting or repairing the scooter. |
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A CAUTION indicates special precautions that must be taken to avoid damage to |
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CAUTION: |
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the scooter. |
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NOTE: |
A NOTE provides key information to make procedures easier or clearer. |
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NOTE:
●This manual should be considered a permanent part of this scooter and should remain with it even if the scooter 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 scooter and this manual. If you have any questions concerning this manual, please consult your Yamaha dealer.
EWA12410
WARNING
PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS SCOOTER.
IMPORTANT MANUAL INFORMATION
EAUM1010
YQ50/YQ50L
OWNER’S MANUAL ©2004 by MBK INDUSTRIE 1st edition, August 2004 All rights reserved
Any reprinting or unauthorized use without the written permission of MBK INDUSTRIE
is expressly prohibited. Printed in France.
TABLE OF CONTENTS
SAFETY INFORMATION .................. |
1-1 |
Further safe-riding points ................ |
1-4 |
DESCRIPTION .................................. |
2-1 |
Left view .......................................... |
2-1 |
Right view ........................................ |
2-2 |
INSTRUMENT AND CONTROL |
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FUNCTIONS ....................................... |
3-1 |
Main switch/steering lock ................ |
3-1 |
Indicator and warning lights ............ |
3-2 |
Speedometer unit ........................... |
3-3 |
Tachometer (Depends on |
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models) ........................................ |
3-3 |
Fuel gauge ...................................... |
3-4 |
Handlebar switches ........................ |
3-4 |
Front brake lever ............................ |
3-5 |
Rear brake lever ............................. |
3-5 |
Fuel tank cap .................................. |
3-5 |
Fuel ................................................. |
3-6 |
Catalytic converter .......................... |
3-7 |
2-stroke engine oil tank .................. |
3-7 |
2-stroke engine oil .......................... |
3-8 |
Kickstarter ....................................... |
3-8 |
Rider seat ....................................... |
3-8 |
Storage compartment A................... |
3-9 |
Storage compartment B................. |
3-10 |
Adjusting the shock absorber |
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assembly (Depends on |
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models) ...................................... |
3-10 |
PRE-OPERATION CHECKS ............. |
4-1 |
Pre-operation check list .................. |
4-2 |
OPERATION AND IMPORTANT |
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RIDING POINTS................................. |
5-1 |
Starting the engine .......................... |
5-1 |
Starting off ...................................... |
5-2 |
Acceleration and deceleration ........ |
5-2 |
Braking ........................................... |
5-3 |
Tips for reducing fuel |
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consumption ............................... |
5-3 |
Engine break-in .............................. |
5-4 |
Parking ........................................... |
5-4 |
PERIODIC MAINTENANCE AND |
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MINOR REPAIR ................................. |
6-1 |
Periodic maintenance and |
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lubrication chart .......................... |
6-2 |
Removing and installing the |
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cowling and panel ....................... |
6-5 |
Checking the spark plug ................. |
6-6 |
Final transmission oil ...................... |
6-7 |
Coolant ........................................... |
6-8 |
Cleaning the air filter element ........ |
6-9 |
Adjusting the carburetor ............... |
6-10 |
Checking the throttle cable free |
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play ........................................... |
6-11 |
Tires ............................................. |
6-11 |
Cast wheels .................................. |
6-13 |
Checking the front and rear brake |
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lever free play ........................... |
6-13 |
Checking the front and rear brake |
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pads .......................................... |
6-14 |
Checking the brake fluid level ...... |
6-15 |
Changing the brake fluid .............. |
6-15 |
Checking and lubricating the |
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throttle grip and cable ............... |
6-16 |
Lubricating the front and rear brake |
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levers ........................................ |
6-16 |
Checking and lubricating the |
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centerstand............................... |
6-16 |
Checking the front fork ................. |
6-17 |
Checking the steering .................. |
6-17 |
Checking the wheel bearings ....... |
6-18 |
Battery ......................................... |
6-18 |
Replacing the fuse ....................... |
6-20 |
Replacing the headlight bulb ....... |
6-21 |
Replacing the tail/brake light |
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bulb ........................................... |
6-21 |
Replacing a turn signal light |
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bulb ........................................... |
6-22 |
Troubleshooting ........................... |
6-22 |
Troubleshooting charts ................ |
6-23 |
SCOOTER CARE AND STORAGE... |
7-1 |
Care ............................................... |
7-1 |
Storage .......................................... |
7-3 |
SPECIFICATIONS ............................ |
8-1 |
CONSUMER INFORMATION............ |
9-1 |
Identification numbers .................... |
9-1 |
SAFETY INFORMATION
EAUT1010
SCOOTERS 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 SCOOTER.
HE OR SHE SHOULD:
●OBTAIN THOROUGH INSTRUCTIONS FROM A COMPETENT SOURCE ON ALL ASPECTS OF SCOOTER OPERATION.
●OBSERVE THE WARNINGS AND MAINTENANCE REQUIREMENTS IN THE OWNER’S MANUAL.
●OBTAIN QUALIFIED TRAINING IN SAFE AND PROPER RIDING TECHNIQUES.
●OBTAIN PROFESSIONAL TECHNICAL SERVICE AS INDICATED BY THE OWNER’S MANUAL
AND/OR WHEN MADE NECESSARY BY MECHANICAL CONDITIONS.
Safe riding
●Always make pre-operation checks. Careful checks may help prevent an accident.
●This scooter is designed to carry the operator and passenger.
NOTE:
Although this scooter is designed to carry a passenger, always comply with the local regulations.
●The failure of motorists to detect and recognize scooters in traffic is the predominating cause of automobile/scooter accidents. Many accidents have been caused by an automobile driver who did not see the scooter. Making yourself conspicuous appears to be very effective in reducing the chance of this type of accident.
Therefore:
•Wear a brightly colored jacket.
1-1
• Use extra caution when approaching and passing through intersections, since intersections are the most likely places 1 for scooter accidents to occur.
•Ride where other motorists can see you. Avoid riding in another motorist’s blind spot.
●Many accidents involve inexperienced operators. In fact, many operators who have been involved in accidents do not even have a current driver’s license.
•Make sure that you are qualified and that you only lend your scooter to other qualified operators.
•Know your skills and limits. Staying within your limits may help you to avoid an accident.
•We recommend that you practice riding your scooter where there is no traffic until you have become thoroughly familiar with the scooter and all of its controls.
●Many accidents have been caused by error of the scooter operator. A typical error made by the
SAFETY INFORMATION
operator is veering wide on a turn due to EXCESSIVE SPEED or under cornering (insufficient lean an-
1gle for the speed).
•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 both hands on the handlebar and both feet on the footboard during operation to maintain control of the scooter.
•The passenger should always hold onto the operator, the seat strap or grab bar, if equipped, with both hands and keep both feet on the passenger footrests.
•Never carry a passenger unless he or she can firmly place both feet on the passenger footrests.
●Never ride under the influence of alcohol or other drugs.
●This scooter is designed for onroad use only. It is not suitable for off-road use.
Protective apparel
The majority of fatalities from scooter accidents are the result of head injuries. The use of a safety helmet is the single most critical factor in the prevention or reduction of head injuries.
●Always wear an approved helmet.
●Wear a face shield or goggles. Wind in your unprotected eyes could contribute to an impairment of vision which could delay seeing a hazard.
●The use of a jacket, substantial shoes, trousers, gloves, etc., is effective in preventing or reducing abrasions or lacerations.
●Never wear loose-fitting clothes, otherwise they could catch on the control levers or wheels and cause injury or an accident.
●Never touch the engine or exhaust system during or after operation. They become very hot and can
cause burns. Always wear protective clothing that covers your legs, ankles, and feet.
●Passengers should also observe the above precautions.
Modifications
Modifications made to this scooter not approved by Yamaha, or the removal of original equipment, may render the scooter unsafe for use and may cause severe personal injury. Modifications may also make your scooter illegal to use.
Loading and accessories
Adding accessories or cargo to your scooter can adversely affect stability and handling if the weight distribution of the scooter is changed. To avoid the possibility of an accident, use extreme caution when adding cargo or accessories to your scooter. Use extra care when riding a scooter that has added cargo or accessories. Here are some general guidelines to follow if loading cargo or adding accessories to your scooter:
1-2
SAFETY INFORMATION
Loading
The total weight of the operator, passenger, accessories and cargo must not exceed the maximum load limit of 180 kg (397 lb). When loading within this weight limit, keep the following in mind:
●Cargo and accessory weight should be kept as low and close to the scooter as possible. Make sure to distribute the weight as evenly as possible on both sides of the scooter to minimize imbalance or instability.
●Shifting weights can create a sudden imbalance. Make sure that accessories and cargo are securely attached to the scooter before riding. Check accessory mounts and cargo restraints frequently.
●Never attach any large or heavy items to the handlebar, front fork, or front fender. Such items can create unstable handling or a slow
steering response. Accessories
Genuine Yamaha accessories have been specifically designed for use on this scooter. Since Yamaha cannot test
all other accessories that may be available, you must personally be responsible for the proper selection, installation and use of non-Yamaha accessories. Use extreme caution when selecting and installing any accessories.
Keep the following guidelines in mind, as well as those provided under “Loading” when mounting accessories.
●Never install accessories or carry cargo that would impair the performance of your scooter. Carefully inspect the accessory before using it to make sure that it does not in any way reduce ground clearance or cornering clearance, limit suspension travel, steering travel or control operation, or obscure lights or reflectors.
•Accessories fitted to the handlebar or the front fork area can create instability due to improper weight distribution or aerodynamic changes. If accessories are added to the handlebar or front fork area, they must be as lightweight as possible and should be kept to a minimum.
1-3
•Bulky or large accessories may seriously affect the stability of the scooter due to aerodynamic
effects. Wind may attempt to lift |
1 |
the scooter, or the scooter may |
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become unstable in cross winds. These accessories may also cause instability when passing or being passed by large vehicles.
•Certain accessories can displace the operator from his or her normal riding position. This improper position limits the freedom of movement of the operator and may limit control ability, therefore, such accessories are not recommended.
●Use caution when adding electrical accessories. If electrical accessories exceed the capacity of the scooter’s electrical system an electric failure could result, which could cause a dangerous loss of lights or engine power.
SAFETY INFORMATION
Gasoline and exhaust gas
●GASOLINE IS HIGHLY FLAMMABLE:
1• Always turn the engine off when refueling.
•Take care not to spill any gasoline on the engine or exhaust system when refueling.
•Never refuel while smoking or in the vicinity of an open flame.
●Never start the engine or let it run for any length of time in a closed area. The exhaust fumes are poisonous and may cause loss of consciousness and death within a short time. Always operate your scooter in an area that has adequate ventilation.
●Always turn the engine off before leaving the scooter unattended and remove the key from the main switch. When parking the scooter, note the following:
•The engine and exhaust system may be hot, therefore, park the scooter in a place where pedestrians or children are not likely to touch these hot areas.
•Do not park the scooter on a slope or soft ground, otherwise it may fall over.
•Do not park the scooter near a flammable source (e.g., a kerosene heater, or near an open flame), otherwise it could catch fire.
●If you should swallow any gasoline, inhale a lot of gasoline vapor, or allow gasoline to get into your eyes, see your doctor immediately. If any gasoline spills on your skin or clothing, immediately wash the affected area with soap and water and change your clothes.
EAU10371
Further safe-riding points
●Be sure to signal clearly when making turns.
●Braking can be extremely difficult on a wet road. Avoid hard braking, because the scooter could slide. Apply the brakes slowly when stopping on a wet surface.
●Slow down as you approach a corner or turn. Once you have completed a turn, accelerate slowly.
●Be careful when passing parked cars. A driver might not see you and open a door in your path.
●Railroad crossings, streetcar rails, iron plates on road construction sites, and manhole covers become extremely slippery when wet. Slow down and cross them with caution. Keep the scooter upright, otherwise it could slide out from under you.
●The brake pads could get wet when you wash the scooter. After washing the scooter, check the brakes before riding.
1-4
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SAFETY INFORMATION |
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● Always wear a helmet, gloves, |
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trousers (tapered around the cuff |
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and ankle so they do not flap), and |
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a bright colored jacket. |
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1 |
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●Do not carry too much luggage on the scooter. An overloaded scooter is unstable.
1-5
DESCRIPTION
EAU10410
Left view
1 |
2 |
3 |
4 |
2
9
8
7
6
1.Rear brake lever (page 3-5)
2.Left handlebar switches (page 3-4)
3.Speedometer unit (page 3-3)
4.Main switch/steering lock (page 3-1)
5.Final transmission oil filler cap (page 6-7)
6.Centerstand (page 6-16)
7.Kickstarter (page 3-8)
8.Air filter element (page 6-9)
5
9. Coolant level check window (page 6-8)
2-1
DESCRIPTION
EAU10420
Right view
1 |
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3 |
4 |
2
6
5
1.Fuel tank cap (page 3-5)
2.Throttle grip (page 6-11)
3.Front brake lever (page 3-5)
4.Coolant reservoir cap (page 6-8)
5.Battery/fuse (page 6-18/6-20)
6.Oil tank cap (page 3-7)
2-2
INSTRUMENT AND CONTROL FUNCTIONS
EAU10460
Main switch/steering lock
OPEN
PUSH
3
ZAUM0253
The main switch/steering lock controls the ignition and lighting systems, and is used to lock the steering. The various positions are described below.
EAU10640
ON “
”
All electrical circuits are supplied with power, and the engine can be started. The key cannot be removed.
NOTE:
The headlight, meter lighting and taillight come on automatically when the engine is started.
EAU10660
OFF “
”
All electrical systems are off. The key can be removed.
EAU10670
CHECK “
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The 2-stroke engine oil level warning light should come on. (See page 3-2.)
EAU10680
LOCK “ 
”
The steering is locked, and all electrical systems are off. The key can be removed.
To lock the steering
1.Turn the handlebars all the way to the left.
2.Push the key in from the “
” position, and then turn it to “
” while still pushing it.
3.Remove the key.
To unlock the steering
Push the key in, and then turn it to “
” while still pushing it.
EWA10060
WARNING
Never turn the key to “
” or “
” while the vehicle is moving, otherwise the electrical systems will be switched off, which may result in loss of control or an accident. Make sure that the vehicle is stopped before turning the key to “
” or “
”.
3-1
INSTRUMENT AND CONTROL FUNCTIONS
EAU11002
Indicator and warning lights
TEMP
1 2 3
ZAUM0254
1.Turn signal indicator light “
”
2.High beam indicator light “ 
”
3.Oil level warning light “ 
”
EAU11020
Turn signal indicator light “
”
This indicator light flashes when the turn signal switch is pushed to the left or right.
EAU11080
High beam indicator light “
”
This indicator light comes on when the high beam of the headlight is switched on.
EAU11180
Oil level warning light “
”
This warning light comes on when the key is in the “
” position or when the oil level in the 2-stroke engine oil tank is low during operation. If the warning
light comes on during operation, stop immediately and fill the oil tank with Yamalube 2 or equivalent 2-stroke engine oil of either JASO grade “FC” or ISO grades “EG-C” or “EG-D”. The warning light should go off after the 2-stroke engine oil tank has been refilled.
NOTE:
If the warning light does not come on when the key is in the “
” position or does not go off after the 2-stroke engine oil tank has been refilled, have a Yamaha dealer check the electrical circuit.
ECA10010
CAUTION:
Do not operate the vehicle until you know that the engine oil level is sufficient.
EAU11430
Coolant temperature warning light
“ 
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Km / h
TEMP |
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1
ZAUM0255
1. Coolant temperature warning light “ 
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This warning light comes on when the engine overheats. When this occurs, stop the engine immediately and allow the engine to cool.
ECA10020
CAUTION:
Do not operate the engine if it is overheated.
3-2
INSTRUMENT AND CONTROL FUNCTIONS
Speedometer unit
1
3
2
ZAUM0291
1.Speedometer
2.Odometer
UK ONLY
1
2
EAU11620 |
The speedometer unit is equipped with |
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a speedometer and an odometer. The |
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speedometer shows riding speed. The |
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odometer shows the total distance trav- |
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eled. |
EAU11851
Tachometer (Depends on models)
1 |
2 |
ZAUM0292
1.Tachometer
2.Tachometer red zone
The electric tachometer allows the rider to monitor the engine speed and keep it within the ideal power range.
ECA10031
CAUTION:
Do not operate the engine in the tachometer red zone.
Red zone: 10000 r/min and above
ZAUM0594
1.Speedometer
2.Odometer
3-3
INSTRUMENT AND CONTROL FUNCTIONS
EAU12140
Fuel gauge
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1 |
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E |
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F |
ZAUM0257
1. Fuel gauge
The fuel gauge indicates the amount of fuel in the fuel tank. The needle moves towards “E” (Empty) as the fuel level decreases. When the needle reaches “E”, refuel as soon as possible.
NOTE:
Do not allow the fuel tank to empty itself completely.
EAU12343
Handlebar switches
Left
3
1
2
ZAUM0259
1.Horn switch “ 
”
2.Turn signal switch “
/ 
”
3.Dimmer switch “ 
/
”
Right
1
Turn signal switch “ / |
EAU12460 |
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” |
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To signal a right-hand turn, push this |
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switch to “ ”. To signal a left-hand |
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turn, push this switch to “ |
”. When re- |
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leased, the switch returns to the center |
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position. To cancel the turn signal |
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lights, push the switch in after it has re- |
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turned to the center position. |
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Horn switch “ |
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EAU12500 |
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Press this switch to sound the horn.
EAUM1131
Start switch “
”
Push this switch while applying the front or rear brake to crank the engine with the starter.
ECA10050
CAUTION:
See page 5-1 for starting instructions prior to starting the engine.
ZAUM0261
1. Start switch “
”
EAU12400
Dimmer switch “
/
”
Set this switch to “
” for the high beam and to “
” for the low beam.
3-4
INSTRUMENT AND CONTROL FUNCTIONS
EAU12900
Front brake lever
1
3
ZAUM0084
1. Front brake lever
The front brake lever is located on the right handlebar grip. To apply the front brake, pull this lever toward the handlebar grip.
EAU12950
Rear brake lever
1
ZAUM0085
1. Rear brake lever
The rear brake lever is located on the left handlebar grip. To apply the rear brake, pull this lever toward the handlebar grip.
EAUM2080
Fuel tank cap
1
ZAUM0262
1. Fuel tank cap
To remove the fuel tank cap
1.Open the fuel tank cap lock cover.
2.Insert the key into the lock and turn it 1/4 turn counterclockwise. The lock will be released and the fuel tank cap can be removed.
To install the fuel tank cap
1.Push the fuel tank cap into position with the key inserted in the lock.
2.Turn the key clockwise to the original position, and then remove it.
3.Close the lock cover.
3-5
INSTRUMENT AND CONTROL FUNCTIONS
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 properly installed before riding.
EAU13210
Fuel
1
2
ZAUM0020
1.Fuel tank filler tube
2.Fuel level
Make sure that there is sufficient fuel in the tank. Fill the fuel tank to the bottom of the filler tube as shown.
EWA10880
WARNING
●Do not overfill the fuel tank, otherwise it may overflow when the fuel warms up and expands.
●Avoid spilling fuel on the hot engine.
ECA10070
CAUTION:
Immediately wipe off spilled fuel with a clean, dry, soft cloth, since fuel may deteriorate painted surfaces or plastic parts.
EAU13270
3
Recommended fuel:
REGULAR UNLEADED GASOLINE ONLY
Fuel tank capacity:
7.0 L (1.85 US gal) (1.54 Imp.gal)
Your Yamaha engine has been designed to use regular unleaded gasoline with a research octane number of 91 or higher. If knocking (or pinging) occurs, use a gasoline of a different brand or premium unleaded fuel. Use of unleaded fuel will extend spark plug life and reduce maintenance costs.
3-6
INSTRUMENT AND CONTROL FUNCTIONS
EAU13440
Catalytic converter
This vehicle is equipped with a catalytic converter in the muffler.
EWA10860
WARNING
The exhaust system is hot after operation. Make sure that the exhaust
3system has cooled down before doing any maintenance work.
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 materials that easily burn.
●Do not allow the engine to idle too long.
EAUM1140
2-stroke engine oil tank
1
2
ZAUM0263
1.Storage compartment B
2.Oil tank cap
To access the 2-stroke engine oil tank, open the storage compartment. (See page 3-10.)
1.Remove the 2-stroke engine oil tank cap by pulling it off.
2.Install the 2-stroke engine oil tank cap by pushing it into the oil tank opening.
ZAUM0204
NOTE:
Make sure that the 2-stroke engine oil tank cap is properly installed before riding the vehicle.
3-7
INSTRUMENT AND CONTROL FUNCTIONS
EAU13460
2-stroke engine oil
Make sure that there is sufficient oil in the 2-stroke engine oil tank. Add the recommended 2-stroke engine oil if necessary.
NOTE:
Make sure that the 2-stroke engine oil tank cap is properly installed.
Recommended oil:
Yamalube 2 or equivalent 2-stroke engine oil (JASO grade “FC”, or ISO grades ”EG-C” or “EG-D”)
Oil quantity:
1.4 L (1.48 US qt) (1.23 Imp.qt)
EAUS1050
Kickstarter
ZAUM0289
1. Kickstarter
To start the engine, push the kickstarter down lightly with your foot until the gears engage, and then push it down smoothly but forcefully.
EAU14160
Rider seat
To open the rider seat
1.Place the scooter on the centerstand.
2.Insert the key into the main switch, and then turn it counterclockwise.
3
NOTE:
Do not push inward when turning the key.
3. Fold the rider seat up.
1
ZAUM0264
1. Seat
To close the rider seat
1.Fold the rider seat down, and then push it down to lock it in place.
3-8
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