Just got gt80 a month ago nothing but problems right now I just replaced cylinder head and piston got rid of low compression head it had a ported cylinder I got a stock one kept reed and keihin carb . My o original head and piston are fried . This one is starting to do the same . Now the carb is leaking . The engine is smoking hot after about 2mins. Of running. Is a non ported cylinder an issue ? I'm t replacing the carb with a stock carb will that help ? It's getting way to much air.