i have a 97 polaris 400 scrambler 2 stroke that ran and everything!...i blew the piston on it and scared the cyclinder. so i resleeved the cyclinder and put a brand new piston in it. i put it all back together and tryed to start it and it would just crank and crank then backfire and crank and crank then backfire. i cant figure wat is wrong with it! any help?
