J-Madd Posted April 13, 2011 Report Share Posted April 13, 2011 I'm building a drag bike for my niece, and we're gonna use a YZ80 motor. Does anyone have a gearing vs speed calculator so I can get an idea how to gear this thing? Stock it has a 14" tire, we're gonna run 19'' tires. I'm thinking we can just gear it to use 3 or 4 gears in 300 ft for now. Any help or suggestions? Quote Link to comment Share on other sites More sharing options...
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