Withdraw the clutch housing (1) complete with driven gear of the primary pair (a).
Remove the inner spacer (2).
Remove the oil pump (d) (sect. 9 - 2.1, Removal of the oil pump).
Lock the primary pinion (b) with the holding tool 88713.3417 And loosen the threaded ring nut (3) using the bush part no. 88713.3406.
Remove the nut (3) and safety washer (4).
Remove the complete primary drive gear (b) using a commercial puller and placing a brass or aluminium pad between the end of the crankshaft and the puller screw.
Remove the spacer (c).
Main bearings
The main bearings have are of the angular contact type with offset inner
races so that the balls transmit loads from one
groove to the other along straight lines at an angle to the axis of the bearing.
The angle-contact ball bearings are
designed for bearing combined loading (radial-axial load ...
Refitting the gear selector lever
Position the gearbox drum selector fork in the centre of the gear rollers.
Position the gear selector lever (21) together with control shaft, spring and
plate into the chain-side crankcase half.
Insert the screws (18) and (20) with the spacer (19).
Temporarily fit gear change lever (or a ...
Removal of the water pump
Note
For clarity, the figures show the engine removed from the frame.
Loosen and remove the water pump cover (12) fixing screws (13) to the
generator cover (16).
Remove the water pump cover (12).
Clean the pump housing of any scale. Check the bearings wear by turning the
impeller s ...