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Power Unit
2) Inspection of Valve Clearance
Disconnect plug cap 1 and then, remove spark plug and
1.
cylinder head cover 2.
Pull recoil starter 3 to turn flywheel clockwise until flywheel
2.
"T" mark a comes cylinder mark b.
· This step brings piston to top dead center of
compression stroke.
· The compression stroke can be known visually
when fuel pump is removed. Projection mark
4 on the camshaft is seen in this stroke.
· T h e p i s t o n i s a t t o p d e a d c e n t e r o f
compression stroke when flywheel mark and
cylinder mark "T" are aligned with each other.
Check clearances of intake valve c and exhaust valve d.
3.
Adjust gap if it is out of specified range.
Perform inspection and adjustment of valve
clearances when engine is cold.
Valve Clearance (when engine is cold) :
(IN) Intake Side c : 0.06 - 0.14 mm (0.0024 - 0.0055 in)
(EX) Exhaust Side d : 0.11 - 0.19mm (0.0043 - 0.0075 in)
5-16
1 1
2
a
b
3
c
d
4
4st 4/5/6 2020
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