Service Manual

Care and maintenance work 6.7 Adjustments
40
6
Setting the valve clearance
z Before valve clearance setting: Let the engi-
ne cool down for at least 30 minutes. Oil
temperature below 80 °C.
z Set crankshaft according to setting sche-
matic,
(  41 )
z Loosen screws 1.
z Remove valve cowling 2 with gasket 3
z Mount the turn-over gear on the flywheel
with fastening screws.
z Turn over the crankshaft until you reach val-
ve overlap.
1)
Cylinder 1 bank A order (  41 )
1)
Exhaust valve is not yet closed, inlet valve begins
to open.
1
2
3
z Loosen lock nut (1).
z Mount rotation angle disc (4) and socket
wrench insert on the valve clearance setting
screw (2).
z Fix the magnet of the rotation angle disc (4).
z Turn the rotation angle disc (4) clockwise to
the stop (rocker arm without clearance) and
set the scale to zero.
z Turn the rotation angle disc (4) anticlockwi-
se until reaching the specified rotation angle
value.
IN = inlet valve 90 °
+10 °
EX = outlet
valve 108 °
+10°
z Hold the rotation angle disc (4) to stop it
twisting.
z Tighten the lock nut 1 (tightening torque 20
Nm ).
z Then set the second valve on the rocker arm
as described above.
z Repeat the setting procedure on every cylin-
der. (  51 ) .
EX
2
1
x
IN
2
1
3
4
z Remount the valve cowling with a new gas-
ket in reverse order.
z Replace the screws (tightening torque 22
Nm).
The valve clearance can also be set using a
feeler gauge. Gauges with 0.25 mm or 0.09 in-
ches must be used for the inlet valve.
Gauges with 0.30mm or 0.12 inches must be
used for the exhaust valve.
Setting schematic for the valve
clearance
Valve overlap: Exhaust valve is not yet closed.
Inlet valve begins to open.