now i have one of these with the 2046 efra pipe. wow, what an impressive motor. it really makes my S5 look like a sport motor now. i went up a tooth on my clutchbell to tame it down a bit and it fly's. why are these motors not seen more or heard of? i got it from a buddy of mine with less than a gallon on it so it still has some loosening up to do. i've done some searches and seen some flame out issues and air leaks, but nothing major. i just feel sorry for my hyper st and the beating the drivetrain is gonna get now.