First off Zone 8 Cycling led me to this site. Awesome resource of info here. Just bought and installed RAW 80cc kit on bike. Got it started, ran good for about 15 minutes and after that started sputtering. I could get it to idle now it won't even do that. There is no blockage in fuel line, and no blockage in carb. Tried a few suggestions from this site. Been reading for about two hours plus of and on all day. There's no fuel leaks, no air intake blockage. Running recommended 16:1 ratio to break in motor. I'ma little frustrated here. Do I need a new spark plug? Is the kit crap or what? I'm willing to try anything your vast resource of knowledge base here has to offer.