Service Manual

11
Valve Clearance Inspection and Adjustment
NOTE: Valve clearance inspection and adjustment must be done with the engine cold.
1. Rotate Engine to TDC (top-dead-center) of the compression stroke.
2. Remove the valve cover. Be sure both valves are completely closed and the decompression arm is not
holding the valve open.
3. Measure the clearance between the rocker
arm and the valve stem with a feeler gauge.
Intake: 0.0039” (0.10 mm)
Exhaust: 0.0059” (0.15 mm)
4. To adjust valve clearance:
- Hold adjustment bolt and loosen the lock nut.
- Turn adjustment bolt to obtain the specified clearance.
- Hold the adjustment bolt and tighten the lock nut
to specification - 11 ft-lbs (15 Nm).
5. Recheck the clearance and readjust if necessary.
6. Inspect the valve cover gasket and replace if necessary. Install the valve cover and torque fasteners to
specification - 7.5 ft-lbs (10 Nm).
Engine Governor – Zero Point Setting
1. Loosen but do not remove the governor arm pinch bolt and nut.
2. Move the governor arm to fully
open the throttle valve. Firmly hold
the governor arm in this position.
3. Rotate the governor arm shaft fully
clockwise and secure it in this position
with a pair of pliers.
4. Tighten the governor arm pinch bolt
and nut to Specification - 7.5 ft-lbs (10 Nm).
5. Verify that the governor arm and throttle valve move freely. Verify engine RPM is within specification.
2
Lock Nut
Valve Stem
Rocker Arm
Governor Arm
Pinch Bolt Nut
Governor Arm
Shaft