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Crankshaft Bearings loose inside Crankcase

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Guys hi!

Got a KX250 2004 and it is the third time opening the engine.

Now the engine gets a new crankshaft and bearings. Last time I changed also the bearings and that time one of the bearing was a bit loose inside the crankcase. I used special bearing bond/adhesive to fix the bearing in the case.

It worked good but this time I want a real strong solution as the play became a bit more as before.

So I heared people here make very very thin copper rings at a turner and place them between bearing and crankcase.

Has anyone experiences with this?

Regards

KC

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A friend of mine repaired a set of cases for one of his vintage bikes. He machined the bearing insert and pressed a machined sleeve in place. He races this bike often and has no problems.

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They are called speedi sleeves I think.

Not sure that's the best solution though. How loose are we talking about?

Are you sure you have the right bearings?

I've never seen that happen to cases. It's odd.

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If pressed out numerous times, that cases can get galled or worn. I usually heat them up in the oven before pressing them out. Then I heat the cases, in the oven, and freeze the bearings. They pretty much drop right in then.

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The case needs to be machined for a proper repair... Guys repair suzuki LT500's all the time with inserts...

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