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Turning a hongdou pw80 into 125cc

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Frenchy

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I am buying a cheap hongdou pw80 tomorow, as a project.

Looking to put a pit bike engine in it (M2r 110/125) but not sure wich engine would fit inside the small frame. I've heard that any engine that fits in the crf50 frames will fit.

Has anyone else successfully attempted this?
I know they r cheap Chinese bikes but they are comfortable to ride if just messing around a field.

Ill attach a picture of the bike the way it sits at the moment and will keep updating the post as I work away on it.

Any info or advice would be appreciated
 

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