what mods do they have for the 4 strokes

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linnix13

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Oct 7, 2009
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i have a hau sheng 49cc 4 stroke, wondering what mods they have out there, im thinking they must have some sort of free flow muffler, and maybe a better air filter, but other than that, you could put on some aggressive valve springs maybe?

not sure, let me know what you guys know of, thanks