I have a Baja fat tired mini bike that I bought for my daughter to learn on before the China Hybird......I wasn't happy with it...ported and polished and made a better header pipe, removed the govener.....better plug....NOW!! It goes twice as fast and is quick off the mark too! I bet for what I did...it is twice the bike it was. Now..is it worth doing on a China bike????? Yes..it depends upon what you use it for though. How much $$$ you have to spend and are you willing to loose fuel mileage?
Personally I don't plan on doing it on her bike as it is strickly a learning tool for use in the fields behind our home untill she is old enough to legally ride the streets and then I will buy her a Jap bike.....just a more sensible approach to the problem...sorry.
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