TIMING AND SYNCHRONIZATION
Page 2C-4 90-857138R1 MAY 2000
Ignition Timing
TDC Timing Mark Alignment
IMPORTANT: As this ignition system is fixed, no adjustment to ignition timing is pos-
sible. If ignition timing is not within specifications, refer to “Test Procedures” follow-
ing to locate faulty component(s).
1. Remove spark plug.
2. Install dial indicator through spark plug opening in cylinder head.
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3. Rotate flywheel to bring piston to TDC position. Check that crankcase cover/cylinder
block TDC mark is aligned with timing mark on flywheel.
b
a
a-TDC Mark
b-Timing Mark
IMPORTANT: If timing mark on flywheel is not in alignment with crankcase cover/cyl-
inder block TDC mark, check for (and correct) one or more of the following possible
causes:
a. Dial indicator has been improperly set up or misread.
b. Flywheel key is sheared.
c. Flywheel is installed incorrectly.
4. Remove dial indicator and adaptors.
5. Install spark plug and connect high tension spark plug lead.
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