its been done.. i own both a 89 250r its one of many ive owned, and a 4mill cub banshee,, i love my R to death for the track and handiling, but i love the raw banshee power for straight n fast, although there are mx banshees that are badass and my R isnt slow when it comes to piped and modded banshees and stock 450s but u get to much on the drag side and the R wont do it for me, so i get the banshee out! but Rs are an excellent handling,jumping cornering, bike, and if u get on planetsand they can be pumped up to drag and hang with the big banshees ask turbo bobby. gpracerx, sandtrixor phoneman they got some sweet drag Rs,,