PERIODIC MAINTENANCE AND MINOR REPAIR
6-18
6
EAU21210
Air intake duct
Check that the screen of the intake duct
is not blocked. Clean the screen if nec-
essary.
EAU21320
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.
The engine should be warm before
making this adjustment.
NOTE:
The engine is warm when it quickly re-
sponds to the throttle.
Check the engine idling speed and, if
necessary, adjust it to specification by
turning the throttle stop screw. To in-
crease the engine idling speed, turn the
screw in direction (a). To decrease the
engine idling speed, turn the screw in
direction (b).
NOTE:
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
1. Air intake duct
1. Throttle stop screw
Engine idling speed:
1250–1350 r/min
5SL21.book Page 18 Tuesday, August 19, 2003 11:00 AM