What is this monster motor you plan to use? A 12v system is likely to fry at low rpm if you are wanting any decent power.
Gear ratio is always the problem, which is why I use hub motors. But, I have one of these coming that will make a Nue 1915 1y hit the perfect speed on a 26" bike.
---JRH---
Last edited by johnrobholmes; 06.15.2009 at 03:53 PM.
Reason: addition
Give it a shot, but it probably won't do too well on acceleration. Maybe lace your rear into a 20" rim to get more reduction? The delrin gear will probably wear fast too.
I'm worried about the Mod1 reduction gearing--I can't see it holding up to 200lbs of rider and bike--even though the reduction will lessen the direct torque applied to it. Can you find a mod2 combo that will work?