It's a buzz felt through the footboards ... regular, repeating till I'm through the speed/ gear combination.
The fact that it's felt through the boards leads me to believe( wrongly?) That it's rear end drive train related rather than front wheel...again though, nothing obvious wrong front end either.
Have to say that this is one of the most frustrating things I've experienced in nearly 50 years of riding.
It's doubly annoying since I got rid of my HD Switchback recently because of even worse vibration after changing the rear tyre...though I managed in the end to trace and sort that one- the factory torque setting for one of the silencer mounting bolts was wrong.
What depresses me is that this problem appears a number of times on the RAT forum with no apparent solution...the same very specific vibes at 25-30 in second gear after a tyre change....most folks end up selling the bike as a solution!
I'd really rather not end up doing that.
As I've said before,ideas and theories are most welcome....
I'm getting to the end of my own ones.
Left to try
A) tighten the drive chain....feels counter intuitive but it is slightly looser than the factory setting of 35-45 mm.
B) Refit the O2 sensors and see if it's a weird fuel mapping issue..though it was fine prior to the tyre change
C) murder someone( anyone/ tyre fitters especially)
D) Suicide..nah, revert to C)
