thats funny, and im not trying to knock you by any means, but the TRUE definition of "horse power" is 33,000 lb.ft./minute. I doubt any one of those engines could pull a quarter of that....in fact auto manufacturers have abused such ratings for years, some of which are actually true. But to put into perspective....1 hp ≡ 33,000 ft·lbf/min

RPM ratings? sure...but actual horse power ratings...not true at all just by looking what a true horse power rating is. i could tie my nitro buggy to my ankle and pin it WOT and it wouldnt move an inch.

go carts carry 3.5 horse power, and they have to carry a full grown man....i can hold my kit with one hand and it wont go anywhere.