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Originally posted by Bobaganoosh
And yes, they are talked up a bit, for instance the chinese have a different way of measuring. American they are actually 66 cc motors which measures all the internal space of the motor, not the combustion chamber (which is a mere 4.88 ci). I also run the 44 tooth sprocket. I know for certain 36 tooth sprockets are readily available. For every tooth removed you add 1 mph to top speed, but have to petal assist much more. There are many ways to tweak a little extra juice out of them. Porting exaustand intake manifolds, synthetic 2stroke oil to reduce the oil/fuel ratio. They require constant maintenance, but in the end are entirely a worthwhile investment. My opinion, believe what you will.