yes i have a banshee it has wisceo pistons, 5mm long rods, 17cc domes, t5 pipes and a port job. i had a friend jet it he put 200's back in and did a plug chop and said they looked fine. but it cuts out and pops when u rev it high but not extremly bad and it you have to give it like 1/2 throddle to take off. it just dome seem right. it ran good before i put them domes in and had it ported. it has 165psi in each cyclinder. any help?