CB750KZ Alternator Rotor stripped threads


CB750 New member
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East Yorkshire
Hi, I am trying to remove the rotor from the generator end of the crankshaft and unfortunately the rotor extractor has stripped the threads from the rotor. Obviously this meant that the rotor was stuck on fast. It was only fitted and torqued correctly about 2 years ago, so it is not a corrosion or time issue.

Does anybody have any suggestions on how to proceed ? I could just leave it on for now and ride as it was charging OK. I only tried to remove it to test run a newer spare rotor that I had just bought.

I am thinking about a 6 inch three legged gear puller with some sort of brass washer on the thrust bolt, to protect the end of the crankshaft. I realise that this will probably destroy the rotor but it will have to come off sometime in the future ?

If and when it does come off, does anybody have any future suggestions, like applying copper grease to the tapers before fitting ?

All help gratefully received !