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Old 07-14-2012, 12:00 AM
young grease monkey young grease monkey is offline
Motorized Bicycle Elite Member
Join Date: Sep 2011
Location: Chicago
Posts: 362
Default Re: Bottom crank jack shaft.

Bbs aren't made for high rpm, so if you want it to last then you will need sealed ball bearings. You will need to ream out the threads in the bottomed bracket to install bearings, not too hard.
some people say that a motorbike defeats the purpose of a bike. i tell them to get a flintstone's car.
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