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Old 04-24-2014, 02:23 AM
Theon Theon is offline
Motorized Bicycle Elite Member
Join Date: Jan 2014
Location: FNQ Australia
Posts: 1,440
Default Re: Bought bottom end from Boy Go Fast, should I be worried?

More stroke more torque and slightly more displacement.
So no 38mm stroke is not better.
By Hybrid I think MAP is referring to rod length.
I'd have got the MBR 40mm stroke motor myself.
But depends what you expect,
I want at least twice the standard HP, and 9000 RPM revs.
can be done with a 38mm stroke, but better off starting with the better bottom end.
If you just want a standard 2 1/2? HP motor, it'll be fine.

Last edited by Theon; 04-24-2014 at 02:27 AM.
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