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Why yes you can. It can handle up to a 125 without much modifcations to the frame, but Tony Tice has been able to put a 250 engine in one, by extending the swing arm

Want to know how?

Currently I have a 80cc YZF motor in mine.

If you want more information otherwise on suping up this great novelty bike, check out as well.

Im on my 4th owned ysr.
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