2-6
NOTE: Rotating the valve adjuster dial counter-
clockwise will open the valve/tappet clearance by
0.05 mm (0.002 in.) per mark.
7. While holding the adjuster dial at the proper clear-
ance setting, tighten the jam nut securely with the
valve adjuster handle.
8. Place the two tappet covers with O-rings into posi-
tion; then tighten the covers securely.
9. Install the spark plug; then install the timing
inspection plug.
Valve/Tappet Clearance
(Valve Adjuster Procedure)
(H2)
To check and adjust valve/tappet clearance, use the
following procedure.
NOTE: The seat, storage compartment cover
assembly, compartment box, air filter/filter hous-
ing, and left-side/right-side engine panels must be
removed for this procedure.
1. Remove the timing inspection plug; then remove
the tappet covers and spark plugs (for more
detailed information, see Section 3 - Servicing
Top-Side Components).
CF005
2. Rotate the crankshaft to the TDC position on the
compression stroke of the front cylinder.
GZ063
NOTE: At this point, the rocker arms and adjuster
screws must not have pressure on them.
NOTE: Use Valve Clearance Adjuster for this pro-
cedure.
3. Place the valve adjuster onto the jam nut securing
the tappet adjuster screw; then rotate the valve
adjuster dial clockwise until the end is seated in
the tappet adjuster screw.
4. While holding the valve adjuster dial in place, use
the valve adjuster handle and loosen the jam nut;
then rotate the tappet adjuster screw clockwise
until friction is felt.
5. Align the valve adjuster handle with one of the
marks on the valve adjuster dial.
6. While holding the valve adjuster handle in place,
rotate the valve adjuster dial counterclockwise
until proper valve/tappet clearance is attained.
NOTE: Refer to the appropriate specifications in
Feeler Gauge Procedure sub-section for the
proper valve/tappet clearance.
NOTE: Rotating the valve adjuster dial counter-
clockwise will open the valve/tappet clearance by
0.05 mm (0.002 in.) per mark.
7. While holding the adjuster dial at the proper clear-
ance setting, tighten the jam nut securely with the
valve adjuster handle.
8. Rotate the engine 270° to the TDC position of the
rear cylinder; then repeat steps 4-7 for the rear
cylinder.
9. Place the tappet covers with O-rings into position;
then tighten the covers securely.
10. Install the spark plugs; then install the timing
inspection plug and crankshaft end cap.
Testing Engine
Compression
To test engine compression, use the following proce-
dure.
1. Remove the high tension lead(s) from the spark
plug(s).
2. Using compressed air, blow any debris from
around the spark plug(s).
! WARNING
Always wear safety glasses when using compressed
air.
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