Vintage Dirt Bike Q & A

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 Post subject: Frozen Flywheel
PostPosted: Sun Mar 06, 2016 8:34 pm 
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Joined: Fri Aug 22, 2014 8:35 pm
Posts: 4
I need some advice. The flywheel on my 1974 250WR is frozen. I have the correct flywheel puller. The threads in the flywheel were so rusty that I couldn't screw in the puller all the way. I have since cleaned the threads out so I could screw in the puller all the way. I've tried penetrating oil, tapping on the bolt and on the flywheel to jar it loose.

It has sat for the past two days with the puller bolt tightened down as tight as I can get it and the flywheel has not budged. I've thought about using heat and/or cold, but I'm not sure where to apply either.

Thanks!
Barry


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 Post subject: Re: Frozen Flywheel
PostPosted: Tue Jun 28, 2016 10:27 am 
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Joined: Thu Jan 03, 2013 6:30 pm
Posts: 89
Had the same issue many times, I'm afraid heat is the only way to release the taper grip. Yes, you may damage the underlying parts so be prepared for that.
First, try a mix of transmission fluid and brake fluid 50/50, its an old tractor piston to liner unstick trick, but I'm afraid heat is the only way.

_________________
1994 AHRMA National Champion Sportsman 125 Intermediate.
1996 AHRMA National Champion Classic 125 Expert.


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