7. Cylinder Head / Valve
7-12
Cylinder Head Installation
Install a new O-ring into the indent of carburetor
insulator, and then install the insulator onto
cylinder head with 2 bolts.
Install camshaft into cylinder head, and align
rocker pin with rocker arm pin hole. Then,
insert the rocker arm pin.
Install rocker arm pin mounting plate.
Loosen valve clearance adjustment nuts and
bolts located on valve rocker arm.
Measure and adjust valve clearance with
thickness gauge.
After valve clearance had been adjusted to
standard value, hold adjustment bolt and then
tighten the adjustment nut.
Valve clearance: Intake: 0.12 +/- 0.02 mm
Exhaust: 0.12 +/- 0.02 mm
Install valve clearance adjustment hole cap with
3 bolts and tighten the bolts.
Clean up all residues and foreign materials onto
the matching surfaces of both cylinder and
cylinder head.
Install chain guide.
Install 2 set pins and cylinder head gasket.
Caution
z Do not damage the matching surfaces
of cylinder and cylinder head.
z Avoid residues of gasket or foreign
materials falling into crankcase as
cleaning.
Carburetor insulator
Stopper plate
dowel pins
Cylinder head
gasket
Chain guide
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