37
5
(5) Feeler gauge (6) Adjusting screw
(7) Lock nut
2. Rotate the flywheel anticlockwise
until the ‘T’ mark (3) on the flywheel
coincides with the index mark (4) on
the left crank case cover. In this
position the piston will either be on
the compression or exhaust stroke.
If they are tight the valves are
O
open, rotate the flywheel 360
anticlockwise and re-align the 'T' mark
with the index mark.
The adjustment must be made when
the piston is at Top Dead Center and
both the inlet and exhaust valves are
closed.
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.
5
6
6
7
Adjustment
1. Remove the crankshaft hole cap (1)
and timing hole cap (2).
The checking or adjusting of valve
clearance should be performed while the
engine is cold. The clearance will change
as the engine temperature rises.
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