Hi,
I have 2011 Yamaha FZ6R (XJ6 Diversion), own it for 4 years, bought used from 1st owner, 56K km ODO.
Roughly Spring 2025, violent vibrations appeared on running bike, after ~4.5KRPM.
This happens even on stationary bike, on neutral.
Felt at handlebars, footpegs & seat, much stronger on the...