Operation Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
6-15
6
EAU21310
Checking the engine idling
speed
The engine idling speed must be
checked as follows and, if necessary,
adjusted by a Yamaha dealer at the in-
tervals specified in the periodic mainte-
nance and lubrication chart.
Start the engine and warm it up for sev-
eral minutes at 1000–2000 r/min while
occasionally revving it to 4000–5000
r/min.
N
O
TE:
The engine is warm when it quickly re-
sponds to the throttle.
EAU21381
Checking the throttle cable
free play
The throttle cable free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
EAU21401
Valve clearance
The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
Engine idling speed:
1000–1100 r/min
1. Throttle cable free play
U5JWE4E0.book Page 15 Friday, July 30, 2004 6:07 PM