Hi - Reid Hannan from Victoria Canada - on a related theme I had my "compensator" blow on me at 60mph the other day, everything locks up RIGHT NOW! No warning, maybe 2-3 seconds of rattling and then the back tire just locked, I skidded for about 50 yds and then thinking the back tire had blown I engaged the clutch, that saved me as I then coasted to a stop off the busy 2 lane highway. I then realized that it was the engine/tranny that was gone, the damage inside the primary was unbelievable. From what I can find this is not uncommon, some have had a "knocking" sound as a warning and others a new vibration and others no warning at all. I would suggest getting the compensator checked at all regular service intervals and re-torqued if required. At the moment we're negotiating over rebuild or new engine/tranny or a new bike.
This failure in many other circumstances would have been tragic.
Cheers.........