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Transmission output shaft bearing removal

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Laverda Dave:
A stupid question but is the roller bearing damaged and worn? The gearbox on Ratty had over 45k on it (probably over 50k as the PO had fitted a mini Speedo on the bike at some point). When I checked the roller bearings they were fine, no play, no nasty rumbling and no tight spots. The rest of the engine was in a terrible condition as a result of the PO blasting it with a sand gun. The roller bearing was good to go again but unfortunately the shaft was worn beyond repair and I purchased the two gear shafts from Ted. I have no idea how many miles were on that gearbox but again the roller bearings were absolutely fine.

Dolomite_:

--- Quote from: Laverda Dave on May 26, 2024, 08:11:46 PM ---A stupid question but is the roller bearing damaged and worn? The gearbox on Ratty had over 45k on it (probably over 50k as the PO had fitted a mini Speedo on the bike at some point). When I checked the roller bearings they were fine, no play, no nasty rumbling and no tight spots. The rest of the engine was in a terrible condition as a result of the PO blasting it with a sand gun. The roller bearing was good to go again but unfortunately the shaft was worn beyond repair and I purchased the two gear shafts from Ted. I have no idea how many miles were on that gearbox but again the roller bearings were absolutely fine.

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The bearing doesn't feel great, quite gritty when spinning it.

Bryanj:
That collar and bearing usually need a hydraulic press to remove and from memory there is a small cross section O ring between collar and bearing but its not shown in any books. Honda use to recommend changing shaft with bearing and the cost extra used to be negligable

McCabe-Thiele (Ted):

--- Quote from: Dolomite_

The bearing doesn't feel great, quite gritty when spinning it.
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It does not take much dirt in a dry bearing for it to feel gritty. I would be looking at more cleaning to ensure any carbon deposits are not the cause. As the bearings have a good wear life I suspect the death knell is corrosion caused by standing for a long time. 
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