My friends stock bore/stock stroke KENZ built Raptor 700 put down 74hp and 54ft lbs at the wheels after he got he got it built and tuned...My Banshee has a fully drag ported 421 cub with all the bells and whistles on it. On paper my bike should make atleast 15 more HP than the 700, but in the real world he gives me everything I can handle and more. This is dragging on sand..uphill and flats
We trade wins all day long with each other. He's 230lbs I'm 200lbs...We both admit my shee pulls slightly ahead on the very, very, top end...Maybe a bike length up the hill.
I would put my money on the 4 stroke if they both made the same "peak" HP on a dyno.