i swear i posted in this thread already... maybe im going nuts.
theres a spacer behind the sprocket, its part 12 on the parts manual you could just shim that. i threw a new sprocket on and it look straight visually, no problems after 800 miles.
800 sprocket floats with the lock plate holding it on like most other motors, 1000 has the big nut introduced with the teststretta.
i'd probably space the rear on a sss. depends how far off and to where.