NOTE
The checking or adjusting of valve clearance
should be performed while the engine is cold.
The clearance will change as the engine
temperature rises.
•
Remove the timing hole cap (4) and tappet
covers. Rotate the cam sprocket (7)
clockwise using the special tool (8) until the
‘T’ mark (5) on the flywheel coincides with
the index mark (6) on the left crankcase
cover. In this position, the piston will either
be on the compression or exhaust stroke.
6
5
4
(4) Timing hole cap (5) 'T' mark
(6) Index mark
7
8
(7) Cam sprocket (8) Special tool
The adjustment must be made when the
piston is at top dead center and both the inlet
and exhaust valves are closed.
Exhaust: 0.12 mm
•
Check the clearance by inserting the feeler
gauge (9) between the adjusting screw
(10) and valve stem.
Standard clearance (cold condition)
Intake : 0.10 mm
This condition can be determined by moving
the rocker arms. If they are free, it is an
indication that the valves are closed and the
piston is in compression stroke. If they are
tight, the valves are open, rotate the cam
O
sprocket (7) 360 clockwise and realign the
'T' mark with the index mark.
36
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