Owner's Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
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7
EAU21271
Carburetors
The carburetors are important parts of
the engine and emission control sys-
tem, which require very sophisticated
adjustment. Therefore, all carburetor
adjustments should be left to a Yamaha
dealer, who has the necessary profes-
sional knowledge and experience.
EAU21311
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.
EAU21382
Checking the throttle cable
free play
The throttle cable free play should mea-
sure 4.0–6.0 mm (0.16–0.24 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
Engine idling speed:
950–1050 r/min
1. Throttle cable free play
U2C912E0.book Page 20 Tuesday, June 12, 2007 9:27 AM