Ÿ 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.
The adjustment must be made when the
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 re-align
the 'T' mark with the index mark.
piston is at Top Dead Center and both the
inlet and exhaust valves are closed.
Ÿ Check the clearance by inserting the feeler
gauge (9) between the adjusting screw
(10) and valve stem.
(9) Feeler gauge (10) Adjusting screw
(11) Lock nut
Standard clearance (cold condition)
Adjust by loosening the lock nut (11) and
turning the adjusting screw until there is a
slight drag on the feeler gauge. After
tightening the lock nut, check again the
clearance.
Ÿ Install the parts in the reverse order of
removal.
Intake: 0.10 mm Exhaust: 0.10 mm
4
6
5
7
8
9
(4) Timing hole cap (5) 'T' mark (6) Index mark
(7) Cam sprocket (8) Special tool
11
NOTE
Before inserting the feeler gauge, smear a bit
of engine oil on the feeler gauge to avoid
damage to the feeler gauge.
Clutch adjustment may be required if the
vehicle stalls when shifting into gear or tends
to creep or if the clutch slips, causing
acceleration to lag behind engine speed.
Normal clutch lever free play (1) is 10-20
mm at the lever (2).
Clutch lever free play adjustment
33
10
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