Service manual

3 - 17
CHK
ADJ
ADJUSTING THE ENGINE IDLING SPEED
2.Remove:
• air filter case
• quick fasteners 1
Refer to “AIR FILTER CASE AND IGNI-
TION COIL PLATE”.
3.Install:
• engine tachometer
(onto the spark plug lead of cylinder #1)
4.Install:
• air filter case
Refer to “AIR FILTER CASE AND IGNI-
TION COIL PLATE”.
5.Measure:
• engine idling speed
Out of specification → Adjust.
6.Adjust:
• engine idling speed
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a. Turn the pilot screw 1 in until it is
lightly seated.
b. Turn the pilot screw out the specified
number of turns.
c. Turn the throttle stop screw 2 in
direction a or b until the specified
engine idling speed is obtained.
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Engine tachometer
90890-03113
Engine idling speed
1,050 ~ 1,150 r/min
Carburetor angle driver
90890-03158
Pilot screw setting
2-1/2 turns out
Direction a
Engine idling speed is
increased.
Direction b
Engine idling speed is
decreased.