Ah I have built several bikes that way yes. I am talking about converting the china gasoline bike to friction drive. If I can do it easily and inexpensively it will solve my intermittent chain problems.

I love my electric bike but the range just isn't there for me.

by the way on most brush type electric bikes I just change the wiring to the motor to reverse the direction of the engine.

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visit my blog for Riding in the hood,... The home brew bike journal....http://frictiondrivebicycles.blogspot.com/ The deacon's fiction