Checking the ignition timing
- Turn the flywheel clockwise until its 2nd notch
coincides with the Pick-up reference mark as
shown in the figure.
Make sure that the reference point on the camshaft
command crown is aligned with the reference point
on the head as shown in the second figure.
If the reference is opposite the indicator on the
head, turn the crankshaft once more as the piston
must be at the TDC of the bursting phase.
N.B.
TIME THE TIMING SYSTEM UNIT AS DESCRIBED IN CHAP-
TER 6 IF IT IS NOT IN PHASE
Checking the valve clearance
- Remove the spark plug access cover, undo the
4 fixing screws indicated in the figure and remove
the tappet cover.
- To check valve clearance, centre the reference
marks of the timing system point as described
above.
- Use an adequate thickness gauge to check that
the clearance between the valve and the register
corresponds with the indicated values.
Should the valve clearance values, intake and
drainage respectively, be different from the ones
indicated below, adjust them by loosening the lock
nut and operate on the register with a screwdriver
as shown in the figure.
Characteristic
Inlet (with cold engine)
0.10 mm
Outlet (with cold engine)
MSS ZIP 100 4T Maintenance
MAIN - 35
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