PERIODIC MAINTENANCE AND ADJUSTMENT
7-18
7
EAUU0321
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.
The engine should be warm before
making this adjustment.
TIP
●
The engine is warm when it quick-
ly responds to the throttle.
●
A diagnostic tachometer is need-
ed to make this adjustment.
1. Open the seat. (See page 4-8 for
seat opening and closing proce-
dures.)
2. Remove panel B. (See page 7-7
for panel removal and installation
procedures.)
3. Attach the tachometer to the
spark plug lead.
4. Check the engine idling speed
and, if necessary, adjust it to
specification as follows.
5. Remove the rubber cap and in-
sert a Phillips screwdriver into the
throttle stop screw hole.
6. To increase the engine idling
speed, turn the screw in direction
(a). To decrease the engine idling
speed, turn the screw in direction
(b).
TIP
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
ECAU0040
NOTICE
The engine idling speed should be
adjusted to specification. If the idle
speed is too low, the engine may be
hard to start. If the idle speed is too
high, fuel consumption will in-
crease. Always adjust the engine
idling speed when the engine is
warm.
7. Install the panel and close the
seat.
1. Throttle stop screw
Engine idling speed:
1400-1600 r/min
ZAUU0635
1
1
(b)
(b)
(b)
(a)
(a)
(a)
33SF8199E0.book Page 18 Friday, December 11, 2009 1:56 PM
