1
2
3
Checking the valve timing
114
Note:
Unsynchronised valve timing can cause
severe engine damage.
For this reason, following engine faults that
can cause twisting of the shrunk−on cam-
shaft toothed wheel, the correct seating
must be checked by checking the valve
timing.
This check is also recommended after the
camshaft is fitted.
Fig. 1
Remove the cylinder head cover from the 1st cylin-
der.
Set the valve clearance of the 1st cylinder cor-
rectly.
Fig. 2
Turn engine over with cranking device until the
valves of cylinder 1 are in cross−over.
Turn the engine back to approx. 50_ before “TDC”,
then turn forwards to 30_ before “TDC” again.
−observe graduation on flywheel−
Fig. 3
Place the dial gauge with approx. 2 mm initial ten-
sion on the valve spring retainer of the exhaust
valve on cylinder no. 1 and set to “0”.
Turn engine in running direction through 180_.
−exhaust valve fully closed−
Read the stroke of the valve on the dial gauge.
The valve stroke must be between 4.5 and 5.3
mm.
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