thats because they do. i think its thedifference between the dual overhead cam(yam) and sohc(honda). the yfz450 has a slight powerband making it sound like its got more. the power of the 450r is more linear like a craptor. my buddy has a 450r and we have identical setups. he has never come close to beating me in a drag, on the trails or anywhere for that matter. they are quick, but just dont seem to have that extra grunt like the yfz450.