88' Case Bushings

searcher415 · Post by **searcher415** » June 9th, 2009, 7:28 am

What is the best way to bore the rear crankcase bushings. I read they need to be bored 2mm over. Can you remove them from the case and put them in a lathe? The engine is going in an 2001 cr250.

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » June 9th, 2009, 8:00 am

removed and in a lathe is the only way

dannygraves · Post by **dannygraves** » June 9th, 2009, 8:45 am

you can pull the bushings out of your take out 250 motor, then drill the 500 housings w/ a 13/16" bit and tap those 250 bushings in, that what I did on my gen-1

searcher415 · Post by **searcher415** » June 9th, 2009, 10:08 am

Maybe a dumb question but what's the best way to get the bushing out. I don't really want to break anything.

dannygraves · Post by **dannygraves** » June 9th, 2009, 10:17 am

I used a metal rod. there is a gap in the middle between the 2 bushings, then just tap from the otherside some heat would help too.

searcher415 · Post by **searcher415** » June 9th, 2009, 10:45 am

Thanks for the help.

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88' Case Bushings

88' Case Bushings