6-14
PERIODIC MAINTENANCE AND MINOR REPAIR
6
4. Remove the purging bolt.
5. Start the engine and rev it
approximately twenty times while
momentarily creating exhaust
system back pressure using a
shop towel to block the end of
the muffler.
6. Stop the engine and allow the
exhaust pipe to cool.
7. Install the purging bolt and tight-
en it.
1. Purging bolt
EAU00635
Adjusting the throttle cable
free play
The throttle cable free play should
measure 3–5 mm (0.12–0.20 in) at
the throttle grip. Periodically check
the throttle cable free play and, if
necessary, have a Yamaha dealer
adjust it.
a. Throttle cable free play
EAU02911
Adjusting the carburetor
The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most
carburetor adjustments should be left
to a Yamaha dealer, who has the
necessary professional knowledge
and experience. However, the follow-
ing may be serviced by the owner as
part of routine maintenance.
EC000094
cC
The carburetor has been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
5GF-9-14 (USA) 4/23/02 2:10 PM Page 53
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