The complete gearbox
This figure shows the complete gearbox.
All of the thrust washers and speed control
forks are painted red.
Fitting the driving shaft
The driving shaft must be fitted in its main
bearing with a very slight pressure. It may
be necessary to tap the shaft with a plastic
hammer. Before fitting the driving shaft,
position the central conical timing
gear, painted red in the figure. When the
crankcase is completely assembled, there
should be no end float in the drive shaft.
Fitting the two half-crankcases
Carefully clean the contact surfaces and
make sure that the three reference dowels
are in the right place. Carefully position the
gasket and the clutch side half-crankcase.
When the engine is assembled, tap with a
plastic hammer in order to match the
surfaces properly. Then screw in the
twelve fastening screws.
When the engine is completely assembled
there should be no play in the driving shaft
axle and .2 or .3 mm play in the gearböx