OK Ducati techs here is a chance to show your stuff. Out riding my 93 900SL the other day when I heard what sounded like a car spinning the tires in the distance. Not so, it was my bike. It only occurs when the engine is fully warmed up. It sounds somewhat like a loose power steering or fan belt on a car. It happens in gear or out of gear and with the clutch in or out. I have previously replaced the bearing in the clutch pressure plate as I could hear a slight squeek when I spun the piece on the end of the clutch pushrod. Put a bit of lube on the pushrod ends and o rings in case a dragging pressure plate bearing was causing the pushrod to spin. No change. Leads me to believe that it is not transmission related. I pulled off the fairing lowers and belt guards to observe the belt tensioner rollers. They feel fine and seem to be spinning in sync with the belt motion. These are new belts and they are tensioned properly. All ball or roller bearings inside the cases and I don't see how a cage failure could cause this sort of noise. Also no metal particles in the filter screen. It really sounds like squeeling rubber. Any chance one of the belt tensioner rollers, when hot, is exhibiting enough drag to make the belt squeel? Oh yea, the sound is intermittent. While idling fully warmed up it might squeel for only 2 seconds in a minute or off and on for 20 seconds in a minute. I have a 95 900SS SP also and the belt roller resistance to rotation feels the same on both bikes. Other than this noise the engine runs perfectly. Any ideas? Thank you in advance.