"Here come da fuzz!"

Welcome.

I would love to get my hands on a 50cc just to compare the two. I have heard that the 50 is a little smoother and revs quicker. The 70cc is the one they fitted to three wheeled hacks and for loads to be pulled. I know all my 70's would pull me and the bike up any hill around here and accellerate while doing it.

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If it ain't broke, and you mess with it long enough, it will be.