Main Bearing Replacement

Michael Miehle /

Anyone ever replace a Main bearing on their crank before? I have one bad one do I replace both? And how do you get them off? I am thinking about just heating them with a torch and using a puller to apply pressure. If that works will the reverse work for installing the new ones? I am working on a Vespa Grande.

Re: Main Bearing Replacement

i have head of things like putting the crank in the freezer and warming the bearings and vise versa ..

You should at least find a service manual and gather together all the parts including seals and gaskets before getting into it.. The service manual normally outlines exactly how to get bearings off and onto the crank.

Re: Main Bearing Replacement

Michael Miehle /

my manual tells me to bring it to an authorized vespa moped mechanic and since I don't have one locally or not locally for that matter. I'm on my own.

Re: Main Bearing Replacement

You can take the case to a small engine mechanic and have them do it...

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