So i started a thread in the introduce your self forum and thought I would re-post my question in the proper forum; I have a budget of $100 or less and actually would like to find just a motor for around 50 bucks I am going to make my own jack shaft so I'm not sure if I need the 66cc motor. I am wondering if the 49cc motor with a jackshaft will move me at least as good as the 66cc with no shaft or might it be a little faster. Oh not to forget to mention I have a bike set up already and I just want to replace the motor.
this is now
and this is what I want 

this is now




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