Re: break-in period on 48cc , not sure if my engine is running correctly.....
Just out of curiousity: what notch is the C-clip on the carb needle at? You may want to check. Most people set it at the second notch from the top, but you'll want to see what works for you. Also make sure your choke isn't creeping closed on you as you ride. I've had that happen so often that I put a nylock nut on it. When that wasn't working as well as I liked (I have no idea why not) I used locktite on it. That fixed it.
Just my two cents, but you may want to check those things.
"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