i HAD a yamaha zuma 50cc 2-stroke scooter really fun to ride 35mph or less (unless going down hill) . a buddy of mine has one put a 70cc kit in it he said it only increased power like going up hill top speed was still 45 mph wot if you get a 50cc you will need to upgrade the cvt from what he said all the engine mods in the world will not boost top speed with out it
p.s. i may be the only one that doesn't think you are nuts scooters are loads of fun good luck
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06 american lifan 200 gy-5
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