Re: 43mph 48cc stock internals +- 1500 miles later
It's not rocket surgery guys. Many people think that the bigger engine means bigger power, but it's not going to be the case if you get one that's so imbalanced that it shakes itself to pieces. Ive found that the 48s are just more balanced from the beginning, and will rev higher than a 66 any day. Add that to a properly set up bike (which most just don't do, let's be honest here) and it's a recipe for success.