8-26
8
EBU24000
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 lubrica-
tion chart.
A diagnostic tachometer is needed to make this
adjustment.
1. Start the engine and warm it up.
The engine is warm when it quickly responds to the
throttle.
2. Attach the tachometer to the spark plug lead.
3. Check the engine idling speed and, if neces-
sary, adjust it to specification by turning the
throttle stop screw at the carburetor. To in-
crease the engine idling speed, turn the throt-
tle stop screw in direction (a), and to decrease
it, turn the screw in direction (b).
If the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.
EBU24047
Adjusting the throttle lever free play
The throttle lever free play should be checked and,
if necessary, adjusted at the intervals specified in
the periodic maintenance and lubrication chart.
1. Throttle stop screw
Engine idling speed:
1650–1750 r/min
U1PY61E0.book Page 26 Wednesday, March 14, 2012 5:22 PM
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