Slowerthanyou is right about the tire's. I've tried hoosier's but couldn't get good launch. So got american racer tire's from F.A.S.T. hook's good of the line. Running a 392 cub on pump gas. 39 pwk's, shearer in frame pipes, +10 swing arm, 12 in. rear marvin shaw. I don't have a wheelie bar yet. saving some money for a bigger motor on pump gas. Race gas out here is very expensive. 113 oct. is $65 for 5 gal.