i have no experience with this sort of thing but i would imagine the front wheel would be hard to keep down with that setup.
well this is a 600. r1s can pop power wheelies easy. my 600 can barely do em in first, i have to roll off then roll on. clutching up in second is impossible, and first is the only gear that'll do em nicely with clutching up, and even then its hard. I wanna be able to ride around in second gear and then clutch em up high, i don't wanna have to slow to 10mph to pull one.-1 +3 is a bit extreme. i have -1 and stock rear, but R1's are notoriously geared too high from the factory, and most people drop a tooth on the front sprocket.