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PERIODIC MAINTENANCE 2-23
Periodic Maintenance Procedures
Engine Top End
Valve Clearance Inspection
NOTE
○
Check the valve clearance only when the engine is cold
(at room temperature).
•
Remove:
Left Side Cover (see Frame chapter)
Battery Case (see Frame chapter)
Valve Adjusting Caps [A]
Recoil Starter (see Recoil Starter chapter)
•
Remove the timing inspection plug [A].
Special Tool - Filler Cap Driver [B]: 57001-1454
•
Turn the crankshaft counterclockwise with a wrench on
the alternator rotor bolt until “T-F” mark [A] on the alter-
nator rotor aligns with the notch [B] as shown: the end of
the compression stroke in the front cylinder head.
•
Measure the clearance for all four valves, one at a t ime
between the end of the valve stem and the adjusting
screw [A] with the thickness gauge [B].
Valve Clearance (when cold)
Exhaust:
0.20 ∼ 0.25 mm (0.0079 ∼ 0.0098 in.)
Inlet:
0.10 ∼ 0.15 mm (0.0039 ∼ 0.0059 in.)
If the valve clearance is not correct, adjust it (see Valve
Clearance Adjustment).