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Old 06-02-2013, 01:20 PM
5-7HEAVEN 5-7HEAVEN is offline
Motorized Bicycle Elite Member
Join Date: Aug 2008
Posts: 1,912
Default Re: 2 stroke motorized bicycle top speed

Originally Posted by Rmountcastle001 View Post
Is that a bad thing?
From what I've read, that's well past redline (maximum safe) rpm. You can sense @ what rpm range your China engine or my Tanaka 47R feels happy. If it's @ 5,500rpm, then gear it accordingly. Try riding your bike @ different speeds on flat ground, and determine @ what speed your engine feels best. If it's 24mph (for instance), then with a 44t sprocket, your engine's revving @ 5500rpm. If it's happy @ that 5500rpm, but you want to go faster @ that rpm, then install a shift kit. That way, you won't blow up your engine.

Last edited by 5-7HEAVEN; 06-02-2013 at 01:27 PM.
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