in all honesty, the new 450 bike run damn good. it takes quite a bit of motor work to run with those bikes! by neighbor is an "a" rider... i raced his rmz and yzf 450's with every one of my motors. stock stroke stock cyl. ported motor = fail, 4mil stock cyl. dune ported = fail, my 421 and 465 cubs got the trick done tho. if riders are equal in weight and skill the banshee is gonna have to have 75+ hp to get the job done