7 - 1 2
PERIODIC MAINTENANCE AND ADJUSTMENT
7
EAU39930
Adjusting the carburetor
The carburetor is an important part of
the engine and requires very
sophisticated adjustment. Therefore,
most carburetor adjustments should be
left to a Yamaha dealer, who has the
necessary professional knowledge and
experience. The adjustment described
in the following section, however, may
be serviced by the owner as part of
routine maintenance.
ECA10550
NOTICE
The carburetor has been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical
knowledge may result in poor
performance of or damage to the
engine.
EAU21362
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
TIP
A diagnostic tachometer is needed to
make this adjustment.
1. Attach the tachometer to the spark
plug lead.
2. Start the engine and warm it up for
several minutes at 1000-2000 r/min
while occasionally revving it to
4000-5000 r/min.
TIP
The engine is warm when it quickly re-
sponds to the throttle.
1. Adjusting bolt
3. Check the engine idling speed
and, if necessary, adjust it to
specification by turning the
throttle stop screw. To increase
the engine idling speed, turn the
screw in direction (a). To decrease
the engine idling speed, turn the
screw in direction (b).
Engine idling speed:
1.400-1.600 r/min
Cap_7-15.pmd
3/2/2009, 09:27
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Summary of Contents for TT-R230Y
Page 9: ...LOCATION OF IMPORTANT LABELS 1 1 2 Cap_1 15 pmd 29 1 2009 10 21 2 ...
Page 27: ...FORYOUR SAFETY PRE OPERATION CHECKS 5 5 2 Cap_5 15 pmd 2008 06 04 07 59 2 ...
Page 34: ...7 4 PERIODIC MAINTENANCE AND ADJUSTMENT 7 Cap_7 15 pmd 3 2 2009 09 27 4 ...
Page 69: ...CONSUMER INFORMATION 10 10 5 Cap_10 15 pmd 29 1 2009 12 18 5 ...
