I will have to look into this more.
One of the things I learned in the MSF class, which I never knew, is the clutch is in the oil, and its difficult to abuse it (compared to a car). The first time we rode the bikes they had us slip the clutch in the friction zone, pulling the bike forward a couple feet with our feet down, then push the bike back, slip the clutch, push the bike back - over and over for about 5 minutes or more to get the feel for the pull of the slipping clutch. I was very uncomfortable, I know if I did that with any of my cars the clutch would be smoking.
Same when we got to the 'slow in traffic' practice, riding slower that the bike would go at idle speed, slipping the clutch repeatedly to keep the bike crawling along (feet up), and the same on U turns and figure 8's.
I got the definite impression that the oil keeps the clutch cool, and you would have to rev the crap out of the engine and slip the clutch to damage it. They taught us to rev the engine just a bit to keep it from stalling, and then use the clutch as the speed control, esp when turning.
Actually there are some weird physics involved (weird because its counter intuitive). When the clutch is slipping it does not matter how fast the engine is spinning, because the force of the friction on the clutch plate is the same if the engine is going 500 RPM or 5000 RPM. For example if you are slipping the clutch and going 2mph, if you hold the clutch in the same position and rev up the engine the bike does not go any faster, because the friction force is not a function of speed (its a function of the pressure you are applying to the clutch plate). Once the clutch is fully engaged, then its all about engine rpm.