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4-1
4
EAU01114
4-PRE-OPERATION CHECKSOwners are personally responsible for their vehicle’s condition. Your motorcycle’s vital functions can start to deteriorate
quickly and unexpectedly, even if it remains unused (for instance, if it is exposed to the elements). Any damage, fluid leak or
loss of tire pressure could have serious consequences. Therefore, it is very important that, in addition to a thorough visual in-
spection, you check the following points before each ride.
EAU00340
PRE-OPERATION CHECK LIST
ITEM CHECKS PAGE
Front brake• Check operation, fluid level and vehicle for fluid leakage.
• Fill with DOT 4 brake fluid if necessary.
6-17 ~ 6-21
Rear brake• Check operation, fluid level and vehicle for fluid leakage.
• Fill with DOT 4 brake fluid if necessary.
Clutch• Check operation, fluid level and vehicle for fluid leakage.
• Fill with DOT 4 brake fluid if necessary.6-16
Throttle grip and housing• Check for smooth operation.
• Lubricate if necessary.6-12
Engine oil• Check oil level.
• Fill with oil if necessary.6-7 ~ 6-9
Coolant reservoir tank• Check coolant level.
• Fill with coolant if necessary.6-10 ~ 6-11
Final gear oil• Check vehicle for leakage. 6-10
Wheels and tires• Check tire pressure, wear and for damage. 6-13 ~ 6-16
Brake and shift pedal
shafts• Check for smooth operation.
• Lubricate if necessary.6-21
Brake and clutch lever
pivots• Check for smooth operation.
• Lubricate if necessary.6-22
Sidestand pivot• Check for smooth operation.
• Lubricate if necessary.6-22
E_4YP_Preop.fm Page 1 Wednesday, October 6, 1999 10:04 AM
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
EAU01220
Final gear oilCheck for oil leakage. If any leakage is
found, take the motorcycle to a
Yamaha dealer for repairs.
EAU01589
Coolant1. Remove the reservoir tank cover
by removing the screw.
2. Check the coolant level in the res-
ervoir tank when the engine is cold
as the coolant level will vary with
engine temperature. The coolant
level should be between the maxi-
mum and minimum marks.
3. If the level is low, remove the rid-
er’s seat, open the reservoir tank
cap and add coolant or distilled
water to raise it to the specified
level. (See page 3-10 for seat re-
moval procedures.)4. Install the reservoir tank cap and
rider’s seat.
5. Place the reservoir tank cover in
the original position and install the
screw.
EC000080
CAUTION:@ Hard water or salt water is harmful
to the engine. You may use distilled
water if you can’t get soft water. @
1. Final gear oil filler bolt
2. Final gear oil drain bolt
1. Reservoir tank
2. Maximum level mark
3. Minimum level markReservoir tank capacity:
0.84 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
6
NOTE:@ l
If water is added, have a Yamaha
dealer check the antifreeze con-
tent of the coolant as soon as pos-
sible.
l
Have a Yamaha dealer change
the coolant every two years.
l
The radiator fan operation is com-
pletely automatic. It is switched on
or off according to the coolant tem-
perature in the radiator.
@
EAU00630
Carburetor adjustmentThe carburetors are important parts of
the engine and require very sophisti-
cated adjustment. Most adjustments
should be left to a Yamaha dealer who
has the professional knowledge and
experience to do so. However, the idle
speed may be adjusted by the owner
as part of routine maintenance.
EC000095
CAUTION:@ The carburetors were set at the
Yamaha factory after many tests. If
they are changed, poor engine per-
formance and damage may result. @
EAU01168
Idle speed adjustmentNOTE:@ A diagnostic tachometer must be used
for this procedure. @1. Attach the tachometer. Start the
engine and warm it up for a few
minutes at approximately 1,000 to
2,000 r/min. Occasionally rev the
engine to 4,000 to 5,000 r/min.
The engine is warm when it quick-
ly responds to the throttle.
1. Reservoir tank capE_4YP_Periodic.fm Page 11 Wednesday, October 6, 1999 10:05 AM
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
5. Engine overheating
EW000070
WARNING
@ Do 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. Open the radiator cap as follows. Wait until the engine has
cooled. Remove the radiator cap stopper by removing the screw. Place a thick rag like a towel over the radiator cap
and slowly rotate the cap counterclockwise to the detent. This procedure allows any residual pressure to escape.
When the hissing sound has stopped, press down on the cap while turning counterclockwise and remove it. @NOTE:@ If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is changed to the recom-
mended coolant as soon as possible. @
Wait until the
engine has cooled.
Check the coolant level in the
reservoir tank and/or radiator.
Level is OK.Level is low, check the
cooling system for leakage.
No
leakage.Leakage.
Ask a Yamaha dealer to inspect
and repair the cooling system.Add coolant. (See NOTE.)
Restart the engine. If the engine overheats again, ask a
Yamaha dealer to inspect and repair the cooling system.
E_4YP_Periodic.fm Page 30 Wednesday, October 6, 1999 10:05 AM