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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
6-22
Tail/brake light bulb, replacing
Turn signal light bulb, replacing
EAU24204
Replacing a turn signal light
bulb1. Remove the turn signal light lens
by removing the screw.
FrontZAUM00**
2
1
1. Turn signal light lens
2. Bulb
EAU24133
Replacing the tail/brake light
bulb1. Remove the tail/brake light lens by
removing the screws.ZAUM00**
1
2
1. Tail/brake light lens
2. Bulb2. Remove the burnt-out bulb by push-
ing it in and turning it counterclock-
wise.
3. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.4. Install the lens by installing the
screws. 
NOTICE:
 Do not over-
tighten the screws, otherwise the
lens may break.[ECA10681] 
         
        
        
     
        
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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
6-23
EWA15141
WARNING
When checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the area,
including pilot lights from water heat-
ers or furnaces. Gasoline or gasoline
vapors can ignite or explode, caus-
ing severe injury or property damage.
EAU25881
TroubleshootingAlthough Yamaha  scooters  receive  a
thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting charts rep-
resent quick and easy procedures for
checking these vital systems yourself.
However, should your scooter require any
repair, take it to a Yamaha dealer, whose
skilled technicians have the necessary
tools, experience, and know-how to ser-
vice the scooter properly.
Use only genuine Yamaha replacement
parts. Imitation par ts may look like
Yamaha parts, but they are often infe-
rior, have a shorter service life and can
lead to expensive repair bills. Troubleshooting
Rear
ZAUM00**
1
2
1. Turn signal light lens
2. Bulb2. Remove the burnt-out bulb by push-
ing it in and turning it counterclock-
wise.
3. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
4. Install the lens by installing the
screw. 
NOTICE:
 Do not over-
tighten the screw, otherwise the
lens may break.[ECA11191] 
         
        
        
     
        
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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
Troubleshooting char ts
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start. 
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over 
quickly.
The engine turns over 
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Operate the electric starter.
6-24
EAU42701
Troubleshooting chartsStarting problems or poor engine performance 
         
        
        
     
        
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-25
Wait until the 
engine has cooled.
Check the coolant level in the 
reservoir and radiator.
The coolant level 
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again, 
have a 
Yamaha dealer check 
and repair the cooling system.
There is
leakage.
There is 
no leakage.
Engine overheating
EWAT1040
WARNING
8 88 8
8Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
8 88 8
8Place a thick rag, like a towel, over the radiator cap, and then slowly rotate the cap counterclockwise to the
detent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the cap
while turning it counterclockwise, and then remove the cap.TIP
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. 
         
        
        
     
        
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INDEXAAcceleration and deceleration.................. 5-2
Air filter element, replacing .....................6-11BBattery.....................................................6-19
Brake lever, front ...................................... 3-6
Brake lever, rear....................................... 3-7
Brake levers, lubricating.........................6-16
Brake shoes, checking ..........................6-15
Braking...................................................... 5-2CCare.......................................................... 7-1
Catalytic converters................................. 3-9
Centerstand, checking and lubricating ..6-17
Coolant....................................................6-10
Coolant temperature warning light ........... 3-3DDimmer switch.......................................... 3-6EEngine break-in ......................................... 5-3
Engine oil ................................................... 6-7
Engine trouble warning light ..................... 3-4FFinal transmission oil................................ 6-9
Front and rear brake lever free play,
adjusting...............................................6-14
Front fork, checking...............................6-17
Fuel........................................................... 3-8
Fuel consumption, tips for reducing ........ 5-3
Fuel gauge ................................................ 3-5
Fuel tank cap ............................................ 3-7
Fuse, replacing.......................................6-20
HHandlebar switches.................................. 3-5
Headlight bulb, replacing........................6-21
Helmet holder..........................................3-10
High beam indicator light .......................... 3-3
Horn switch............................................... 3-6IIdentification numbers.............................. 9-1
Indicator and warning lights ..................... 3-3KKey identification number......................... 9-1
Keyhole cover........................................... 3-2
Kickstarter..............................................3-10LLuggage hook .........................................3-12MMain switch/steering lock......................... 3-1
Matte color, caution .................................. 7-1
Model label................................................ 9-2PPanels, removing and installing................ 6-5
Parking...................................................... 5-4
Part locations............................................ 2-1
Periodic maintenance and lubrication
chart ....................................................... 6-2
Pre-operation check list........................... 4-2SSafe-riding points...................................... 1-5
Safety information..................................... 1-1
Seat .........................................................3-10
Spark plug, checking................................ 6-6
Specifications............................................ 8-1Speedometer unit..................................... 3-4
Start switch............................................... 3-6
Starting off ................................................. 5-2
Starting the engine.................................... 5-1
Steering, checking..................................6-18
Storage..................................................... 7-4
Storage compartment.............................3-11
TTail/brake light bulb, replacing ................6-22
Throttle cable free play, checking ..........6-12
Throttle grip and cable, checking and
lubricating.............................................6-16
Tires........................................................6-12
Troubleshooting......................................6-23
Troubleshooting charts...........................6-24
Turn signal indicator light.......................... 3-3
Turn signal light bulb, replacing ..............6-22
Turn signal switch ..................................... 3-6VValve clearance......................................6-12
Vehicle identification number .................... 9-1WWheel bearings, checking ......................6-18
Wheels....................................................6-14