i have just foolishly bought one of these. i have been dissapointed. after riding, a day later i have found it to be pathetically weak against the 50cc version. its gutless and has a top speed of 64 mph which it came to slower than my old 50cc model-im furious after spending all of my savings what a waste. i am currently looking into modifying/tuning it to see if that yeilds any results but it doesnt look good. after a few internet searches i have found nothing.