i just got another banshee but this one has a cheetah engine. i havent looked to much into cheetah engines so i need some help. this bike is built! i was told it is not ported and has 65mm pistons with a coolhead not sure what size domes. it also has 35mm carbs and boysen reeds, fmf pipes. so, the problem is once i ride it up the dunes a few times it starts to lose power. after i take off and go to shift into 3rd gear the motor just dies and i have to turn around when i try to go up a dune. i put some engine ice in it and a billet impeller and a new clutch thinking it was over heating or just a old clutch. any help would be great thanks.