2004 YAMAHA WHY 50 brake

GIVE SAFETY THE RIGHT OF WAY
1
1-2
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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 lining could get wet when you wash the scooter. After washing the scooter, check the brakes
before riding.
•Always wear a helmet, gloves, trousers (tapered around the cuff and ankle so they do not flap), and a
bright colored jacket.
•Do not carry too much luggage on the scooter. An overloaded scooter is unstable. Use a strong cord to
secure any luggage to the carrier. A loose load will affect the stability of the scooter and could divert
your attention from the road.

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DESCRIPTION
Left view
6
5 7
1234
1. Rear brake lever (page 3-5, 6-12, 6-15)
2. Fuel gauge (page 3-3)
3. Speedometer (page 3-3)
4. Main switch (page 3-1, 3-8)5. Final transmission oil filler cap (page 6-6)
6. Kick starter (page 3-7)
7. Air filter (page 6-7)
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2
DESCRIPTION
Right view
8910
11
12
13
14
8. Rear carrier (page 3-9)
9. Passenger seat —
10. Throttle grip (page 6-9, 6-15)
11. Front brake lever (page 3-5, 6-12, 6-15)12. Luggage hook (page 3-9)
13. Battery / fuse (page 6-18 — 6-19)
14. Fuel and oil tank cap (page 3-5)
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INSTRUMENT AND CONTROL FUNCTIONS
Main switch / steering lock .................................................................. 3-1
Indicator and warning lights ................................................................ 3-2
Speedometer unit ................................................................................ 3-3
Fuel gauge .......................................................................................... 3-3
Handlebar switches ............................................................................. 3-4
Front brake lever ................................................................................. 3-5
Rear brake lever .................................................................................. 3-5
Fuel and 2-stroke engine oil tank caps ............................................... 3-5
Fuel ..................................................................................................... 3-6
Catalytic converter .............................................................................. 3-7
2-stroke engine oil ............................................................................... 3-7
Kickstarter ........................................................................................... 3-7
Rider seat ............................................................................................ 3-8
Storage compartment ......................................................................... 3-8
Carrier ................................................................................................. 3-9
Luggage hook ..................................................................................... 3-9
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INSTRUMENT AND CONTROL FUNCTIONS
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1
2
3
4
ZAUM0359
1
ZAUM0360
1. Dimmer switch " / "
2. Cancel button
3. Turn signal switch "
/ "
4. Horn switch "
"
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Handlebar switchesEAU03888
Dimmer switch " / "
Set this switch to "
" for the high beam
and to "
" for the low beam.
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Horn switch ""
Press this switch to sound the horn.
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Start switch ""
Push this switch while applying the front
or rear brake to crank the engine with
the starter.
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See page 5-1 for starting instruc-
tions prior to starting the engine.
1. Start switch ""
3-4
EAUM0097
Turn signal switch " / ""
To signal a right-hand turn, push this
switch to "
". To signal a left-hand
turn, push this switch to "
". When
released, the switch returns to the
center position. To turn off the turn si-
gnal lights, push the cancel button, and
then release it.

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INSTRUMENT AND CONTROL FUNCTIONS
1
ZAUM0084
1
ZAUM0085
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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.
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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.
1. Front brake lever
1. Rear brake lever
12
ZAUM0361
1. Oil tank cap
2. Fuel tank cap
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Fuel and 2-stroke engine oil
tank caps
The fuel tank cap and the 2-stroke
engine oil tank cap are located under
the seat. (See page 3-8 for seat opening
and closing procedures.)
Fuel tank cap
To remove the fuel tank cap, turn it
counterclockwise, and then pull it off.
To install the fuel tank cap, turn it
clockwise.
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PRE-OPERATION CHECKS
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•Check fuel level in fuel tank.
Fuel•Refuel if necessary. 3-5 — 3-6
•Check fuel line for leakage.
•Check oil level in oil tank.
2-stroke engine oil•If necessary, add recommended oil to specified level. 3-5 — 3-7
•Check vehicle for oil leakage.
Final transmission oil•Check vehicle for oil leakage. 6-6
•Check operation.
•If soft or spongy, have Yamaha dealer bleed hydraulic system.
Front brake•Check fluid level in reservoir. 3-5, 6-13 — 6-15
•If necessary, add recommended brake fluid to specified level.
•Check hydraulic system for leakage.
•Check operation.
Rear brake•Check pedal free play. 3-5, 6-13 — 6-15
•Adjust if necessary.
•Make sure that operation is smooth.
Throttle grip•Check cable free play.
6-9, 6-15
•If necessary, have Yamaha dealer adjust cable free play
and lubricate cable and grip housing.
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. Therefore, it is very important, in addition to a thorough visual
inspection, to check the following points before each ride.
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Pre-operation check list
ITEM CHECKS PAGE
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PRE-OPERATION CHECKS
NOTE :
Pre-operation checks should be made each time the scooter is used. Such an inspection can be accomplished in a very
short time; and the added safety it assures is more than worth the time involved.
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If any item in the Pre-operation check list is not working properly, have it inspected and repaired before operating
the scooter.
ITEM CHECKS PAGE
•Check for damage.
Wheels and tires•Check tire condition and tread depth.
6-10 — 6-11
•Check air pressure.
•Correct if necessary.
Brake levers•Make sure that operation is smooth.
6-12, 6-15
•Lubricate lever pivoting points if necessary.
Centerstand•Make sure that operation is smooth.
6-16
•Lubricate pivot if necessary.
Chassis fasteners•Make sure that all nuts, bolts and screws are properly tightened.
—
•Tighten if necessary.
Instruments, lights, signals•Check operation.
3-2 — 3-4
and switch•Correct if necessary.
Battery•Check fluid level.
6-18
•Fill with distilled water if necessary.
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