The vibrations disappear when I am in neutral, pull the clutch or take off the luggage.
If it was something with the chain, sprockets, shaft, tire...it would not disappear when I pull the clutch, right?
Or could it be that pulling the clutch takes away the stress from anything in the transmission (maybe a bent shaft?remember that the chain came off-masterlink opened up at high speed)
Could it be anything with the clutch? It slips sometimes in first gear when I want to take off and the engine is cold...