Ahhhh Traps for the unwary. I was speaking to a Spada expert and he told me of a number of times where Spadas sounded as though they were close to imminent explosion. Owners were sure there was a failing bearing or faulty cam chain tensioner and it turns out to be the 3 bolts that secure the starter clutch sometimes wirk themselves loose . Sure enough, took of the clutch cover and there they were, 3 starter clutch bolts about to fall out. The motor sounds like it just rolled off the production line now. Perfect.