OK.
Prior to tyre change, no problems.
I'd already removed the air injectors and O2 sensors...putting the correct resistors in circuit to prevent the check light from showing up. Bike had run approx 1000 miles with these mods. Also had long tors fitted prior to any of that and the correct remap to adjust.
Tyres had been Metzler me 880's which I was told were no longer being made....shop recommended me 888's as being their replacements.
Rode into shop problem free, rode out with pulsing vibes.got home, chain now with a major tight spot. Checked rear sprocket.... Different readings at different points so maybe warped.
Replaced chain sprockets and cush drive rubbers.
So far, that's the score
