OSD is the way to go. I believe there are 300, 330 and 360 kits out there. Jack shafts work, but are out dated tech. Definitely stick with the known brands, Rubb ain't no cheap Bastid
Check the weights on the rear wheel your thinkin about, it make a HUGE difference. You'll have a go fast Busa too, bit believe me, you'll notice the weight back there. Also, if you can travel around a bit and see a wide tire bike or 2 in person in may help you decide what size is best. Lookin at pics, a 240 doesn't seem too big, but in person, its a lot of tire. I had the only wide tire Busa/sportbike in my area for 2yrs (240) and it got a lot of attention and "Holy crap, that tire is huge!" everywhere I went. Again, clearly not as big as the other kits, but still an attention gettah as Buford T. Justice would say.
Check the weights on the rear wheel your thinkin about, it make a HUGE difference. You'll have a go fast Busa too, bit believe me, you'll notice the weight back there. Also, if you can travel around a bit and see a wide tire bike or 2 in person in may help you decide what size is best. Lookin at pics, a 240 doesn't seem too big, but in person, its a lot of tire. I had the only wide tire Busa/sportbike in my area for 2yrs (240) and it got a lot of attention and "Holy crap, that tire is huge!" everywhere I went. Again, clearly not as big as the other kits, but still an attention gettah as Buford T. Justice would say.