I haven't ever talked to anyone that was all that happy with their missile. They don't handle for crap. Something to think about before you go building a swing arm, figuring out how to get a sprocket mounted to a wheel and don't forget about the idler gear set up you would most likely have to come up with to move the chain over. There is a lot going on there.
YAMAHA 450 HYBRID
85 350X- RED
85 350x -BLACK
86 350x-WHITE (with Goki)
85 250r
83 atc 70
84 atc 70
84 atc 110
09 yfz 450
2006 Arctic Cat Prowler
RZR XP 900