Adjust the engine idle speed periodically on the engine at normal operating temperature.
To adjust the idle speed:

Engine oil and filter change
Throtile cable playConrod and crankshaft inspection
Refer to “engine bottom side disassembly” (page 1d-
49).
Refer to “engine bottom side assembly” .
Conrod small end I.D.
Measure the conrod small end inside diameter using the
small bore gauge.
If the conrod small end inside diameter exceeds the
service limit, replace the conrod.
Special ...
Regulator / rectifier inspection
Inspect the regulator/rectifier in the following procedures:
turn the ignition switch off.
Disconnect the regulator/rectifier couplers. Refer to “regulator /
rectifier removal and installation” .
Measure the voltage between the terminals using the multi-circuit
tester ...
Clutch parts inspection
Refer to “clutch removal” and “clutch installation” .
Clutch drive and driven plate
Note
wipe off the engine oil from the drive and
driven plates with a clean rag.
Measure the thickness of drive plates with a vernier
calipers. If the drive plate thickness is found to have ...