POWER UNIT
INSP
ADJ
E
3-8
8. Install:
9
Gasket (cylinder head cover)
9
Cylinder head cover
9. Install:
9
Spark plug
c
d
7
7
6
1
2
3
7. Tighten:
9
locknut
6
NOTE:
Tighten the locknut, keeping the adjuster
fixed.
Locknut (rocker arm):
10 Nm (1.0 m•kg, 7.2 ft•lb)
Cylinder head cover:
11 Nm (1.1 m•kg, 8.0 ft•lb)
Checking the spark timing
NOTE:
Spark timing is controlled automatically by
the ignitor ass’y. For this reason only the
checking procedure is shown in this sec-
tion.
1. Set:
9
Tachometer
9
Timing light
To spark plug lead for cylinder.
Tachometer:
YU-08036-A/90890-06760
Timing light:
YU-33277-A/90890-03141
Adjustment steps:
8
Loosen the lock nut and insert the
0.10 mm (0.004 in) feeler gauge be-
tween rocker arm and valve stem.
8
Turn adjuster
7
to obtain the proper
clearance.
Turning in
c
c
®
Valve clearance decreases.
Turning out
d
d
®
Valve clearance increases.
6. Adjust:
9
Intake valve clearance
9
Exhaust valve clearance
