Try the M1 10W-40 motorcycle oil. I've had great results with it.
M1 10w40 4T or 20w50 VTwin are bomb proof with respect to maintaining shift quality on 5000+ mile OCI's in my ZRX 1200. With the mods done, it puts down considerably more hp, but more specifically, more torque that grinds oil to its knees. M1 doesn't flinch in either variety. But how would I know as I haven't gotten my foot calibrated yet... I get a good chuckle that the ol' cut and paste has turned into the cut and run, don't see much of it when logic comes into the discussion.