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Old 12-28-2010, 12:43 PM
Rockenstein Rockenstein is offline
Motorized Bicycle Elite Member
Join Date: Feb 2009
Location: Ontario, Canada
Posts: 442
Default Re: choosing a crank shaft

To pick the best one you'll need a couple V Blocks and a DTI (Dial Test Indicator). A lathe and a DTI would work too. A local machine shop might test both of them for trueness too for cheap if you don't have any of the test equipment mentioned. Now keep in mind with a single cylinder engine it's pretty tough to get perfect "balance" but if you can get your cranks running as true as possible you should end up with a fairly smooth running engine.
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