Primary Chain Drive
TO DISMANTLE1. To dismantle the primary drive separately, remove the front cover from the primary chaincase. Then follow the instructions under "To Dismantle" at Manual Transmission/Transaxle/Service and Repair/Unit Repair. Service and Repair
2. Remove the circlip for the bearing in the upper sprocket.
3. Use sleeve 87 90 891 to press the bearing out of the upper chain sprocket.
TO ASSEMBLE
NOTE: Fit the circlip for the outer race of the bearing with the chamfer facing outwards.
1. Fit the circlip into the upper sprocket and press the bearing into the sprocket (see figure). Use sleeve 87 90 859 and drift 88 90 312.
2. Fit the chains, sprockets and chain tensioner as described under "To assemble the gearbox".
3. Fill with oil.