Remove the cover and the soundproofing gasket.
Unscrew the retaining screws and extract the spring cups and the clutch springs.
Pull out the plate pusher.
Remove the drive pin and the clutch plates.
Secure the clutch drum using service tool 88713.0146 and remove the fixing nuts.
Remove the knurled washer, the bush, the O-ring and the support washer.
Pull out the drum with cush drive pads from the clutch shaft.
If you have to change the cush drive pads (1), use a press to push the cush drive pad hub (3) out of the clutch drum (2) and overcome the resistance exerted by the cush drive pads.
Unscrew the eight screws which secure the clutch housing to the primary drive gear. The clutch housing must be kept steady using service tool 88713.0146.
Pull out the clutch housing.
Unscrew and remove the eight right side cover retaining screws together with the support brackets of the breather pipes, and their washers and spacers.
Pull out the cover and the gasket. O Pull out the reference bush (A) and the O-ring (B) near the oil passage hole from the crankcase half.
Pull out the spacer by pulling it outwards with force to overcome the resistance of the O-ring attached to the spacer.
Pull out the primary drive gear with bearings and oil seal.
To change the internal gear elements, use a punch.
After removing the seal ring (3), move the spacer (2) between the two bearings and then tap outwards, working from the inside, using a part of the inner ring of the bearing (1) to be removed as a support.
Caution! Keep changing the support point to ensure straight line extraction.
When they have been removed, change the seal ring (3), the special circlip (4) and the spacer (2). The circlip and the spacer must be changed in pairs.
Pull out the spacer.