Cr, You Probably Already Know This, They Have Around 4 Different Top Belt Gears (cogged Sprocket Or Sheave) For Power Or Speed. Also You Can Bolt On Any Pocket Motor Up To 52 Cc. A Month Ago I Put A 31cc Honda 4 Stroke On A Friction Dr With 1 Inch Drive Roller, It Was Powerless. You Could Even Bolt On Dax`s 50cc Titan 4 Stroke, His Is The Only 49 Or 50cc 4 Stroke That Will Bolt On In 5 Minutes (that I Know Of). Of Course Your Fuel Milage Will Suffer. There Is A Thread On Here From This Spring With Pics. I Think It Was In Tampa, Fl. A Fellow Had A Hopped Up Golden Eagle System With A Motor That He Turned 17,000 Rpm. He Passed Everybody. I Think I Have A Pic. Ron

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PUMP YOUR BRAKES
NEVER BEAT ON IT, GET A BIGGER HAMMER