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Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
When installing the spark plug, always clean
the gasket surface. Wipe off any grime from
the threads and tighten the spark plug to the
specified torque.
Spark plug tightening torque:
12.5 Nm (1.25 m·kgf, 9 ft·lb)
ECS00380
CAUTION:
Make sure that the spark plug caps are se-
curely installed. Otherwise the spark plug
caps could be damaged due to engine vi-
bration.
ESU12900
Adjusting the engine idling
speed
ECS00390
CAUTION:
Be sure to have a Yamaha dealer make
G
this adjustment.
Make sure that the throttle lever moves
G
smoothly.
Make sure that the carburetor is syn-
G
chronized first.
1.
Remove the shroud. (See page 40 for re-
moval procedures.)
2.
Start the engine and warm it up.
3.
Turn the throttle stop screw in or out to
adjust the engine idling speed.
Periodic maintenance
1. Throttle stop screw
Standard engine idling speed:
1300–1500 r/min
4.
Install the shroud.
ESU12910
Adjusting the throttle cable free
ECS00410
CAUTION:
Be sure to adjust the engine idling speed
first.
1.
Remove the shroud and the right side
cover. (See page 40 for removal proce-
dures.)
2.
Loosen the locknut.
3.
Turn the adjusting bolt in or out until the
specified throttle cable free play is ob-
tained.
1. Locknut
2. Throttle cable free play adjusting bolt
3. Throttle cable free play
play
43
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