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- In order to extract damaged bearings, use a specific
extractor, preheating the crankcase (to approximately
90ºC). Never refit dismantled bearings, as these become
damaged during the extraction operation.
- To fit new bearings, preheat the crankcase (to approxi-
mately 90ºC), and use a bearing that has just been remo-
ved from a freezer. This will allow the bearing to be easily
fitted without the need for hardly any pushing. If neces-
sary however, the bearing can be pushed into place.
- Clean and completely degrease the gear change assem-
bly, and then examine it carefully.
- Make a visual examination of the gear change gearing
teeth. If there are thermal fatigue marks (discoloration),
loss of surface hardness covering, or uneven wear to the
teeth (points), replace the damaged components. In the
case of the primary assembly, it should be changed com-
plete.
