Modifications to 6 Speed??

[andy81]

Anybody out there do any transmission mods? Such as back cutting the gears or the baker trap door setup to get rid of the whine? If so where did you have it done, how much? Thanks bike is 2007 fxd 40000 mi

[splitting_lanes]

I switched to redline shockproof transmission fluid, and that got rid of 95% of the whine. can't hear it in any gear (1st or 5th) most of the time.