2-6
Valve/Tappet Clearance
(Feeler Gauge Procedure)
To check and adjust valve/tappet clearance, use the
following procedure.
1. Remove the timing inspection plug; then remove
the tappet covers (for more detailed information,
see Section 3 - Servicing Top-Side Components).
NOTE: Remove the crankshaft end cap and
install the special cap screw (left-hand threads) to
rotate the engine.
2. Rotate the crankshaft to the TDC position on the
compression stroke.
NOTE: At this point, the rocker arms and adjuster
screws must not have pressure on them.
3. Using a feeler gauge, check each valve/tappet
clearance. If clearance is not within specifications,
loosen the jam nut and rotate the tappet adjuster
screw until the clearance is within specifications.
Tighten each jam nut securely after completing the
adjustment.
CC007DC
4. Rotate the engine 270° to the TDC position of the
rear cylinder; then repeat step 3.
GZ059
5. Install the timing inspection plug; then remove the
cap screw and install the crankcase and cap.
6. Place the two tappet covers into position making
sure the proper cap screws are with the proper
cover. Tighten the cap screws securely.
Valve/Tappet Clearance
(Valve Adjuster Procedure)
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 (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.
! CAUTION
The feeler gauge must be positioned at the same
angle as the valve and valve adjuster for an accurate
measurement of clearance. Failure to measure the
valve clearance accurately could cause valve com-
ponent damage.
VALVE/TAPPET CLEARANCE
Intake
0.1016 mm (0.004 in.)
Exhaust
0.1524 mm (0.006 in.)
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