Bump, since I've found that my Street Twin has twisted my input shaft splines a little bit, just ind of an offset area where the clutch hub sits. It's about 3-4 years old, but I don't know how to tell if it's the old style or not.

Can a hardened input shaft be found for the T-56? Would that solve the problem?

I think that spline damage makes it feel like the trans is sticking in gear a little bit, from the clutch hanging up on the shaft and failing to disengage right away. I have to lift throttle more to pop it out of gear than I used to, and it seems to take more clutch action.