Adjusting The Carburetor; Adjusting The Throttle Cable Free Play; Adjusting The Valve Clearance - Yamaha TT-R Owner's Manual

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.
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.
PERIODIC MAINTENANCE AND MINOR REPAIR
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a. Throttle cable free play
Adjusting the throttle cable
EC000094
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.
Adjusting the valve
clearance
The valve clearance changes with
use, resulting in improper air-fuel mix-
ture and/or engine noise. To prevent
this from occurring, the valve clear-
ance must be adjusted by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
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6-14
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