APRILIA SHIVER 900 Service Station Manual page 249

SHIVER 900
•
Rotate the crankshaft anticlockwise
until the front cylinder piston is posi-
tioned at top dead centre, while check-
ing that there is sufficient play on the
camshafts.
•
The front cylinder top dead centre po-
sition must correspond to position (A).
If necessary, remove the distribution gearwheels
from the cam shafts:
•
Position the cam shaft, complete with
distribution gearwheel, in a vice, en-
suring that the shaft is adequately pro-
tected.
•
Unscrew the nut and remove it.
BOTH REAR CYLINDER SHAFTS ARE FITTED WITH LEFT-
HANDED THREAD NUTS, WHICH HAVE BEEN STAMPED
WITH A ANTICLOCKWISE ARROW.
•
Retrieve the washer.
•
Remove the distribution gearwheel
from the cam shaft.
•
Clean the surfaces of the gearwheels
(camshaft cone and gearwheel cone).
•
Pre-assemble the gearwheel on the
camshaft so that it is free to rotate.
•
Position the two camshafts in the hous-
ings in the front big end, aligning the
two bores on the camshaft with the cor-
responding holes on the big end. The
camshaft cams must be convergent.
Engine
ENG - 249