Re: What do I Need for my Requirements?
The best recommendation I can think of, off-hand, would be a fifty-something tooth rear sprocket - like mentioned above. You get the right rear sprocket, even a 49 cc engine will handle whatever you put above it. (Well, to a point. I wouldn't try towing a fifth-wheel trailer with it unless you've got nothing but time.)
"There is nothing wrong with wanting a motorbike that is an extension of your personal taste and fashion sense; if you must ride somewhere, I say do it with style