Re: 80cc Mystery
Also - what the other guys are saying (and I'm not necessarily disagreeing with them) - based on the initial plug pictures, it looks a bit lean. But your engine is back together and we have moved beyond that, right?
Seems to me you should try the top notch or the second notch and go from there. It's gonna turn out that your issue has nothing to do with the needle groove.
Where did you get your new gaskets?