PERIODIC MAINTENANCE 2-19
Engine Top End
Valve Clearance Inspection
NOTE
O Valve clearance must be checked and adjusted
when the engine is cold (room temperature).
Remove the cylinder head cover (see Cylinder
Head Cover Removal in the Engine Top End chapter)
Unscrew the upper [A] and lower [B] caps on the
clutch cover.
Check the valve clearance when the pistons are at
TDC.
O The pistons are numbered beginning with the engine
left side.
Using a wrench [A] on the crankshaft rotation bolt,
turn the crankshaft clockwise until the “1/T” mark
on the timing rotor is aligned with the notch [B] in
the edge of the upper hole in the clutch cover for #1
piston and “2/T” mark for #2 piston.
1/T Mark [A]
2/T Mark [B]
Hole [C] of Upper Cap
Notch [D] in Edge of Upper Hole
Using the feeler gauge [A], measure the valve
clearance between cam and valve lifter.
Valve Clearance
Standard:
Exhaust: 0.22~0.31 mm (0.0087~0.0122 in.)
Intake: 0.15~0.21 mm (0.0059~0.0083 in.)
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