I bought a new race ready Clone engine for a friend and sold him a kart. I cranked by arm off and It would not hit a lick. A friend came over and he got it started, run great! Cut it off and cranks your arm off again trying to start it. When you get it running? It runs great! It seams to be fuel related but I don't have any spare Clone parts. Any ideas on why it is so hard to start??? It is a new stage 2 Clone???? Any help appreciated. That is why I run a Briggs Blockzilla! Thanks. J.C