rd606

As much as I hate to "wake the snake" on one of the most common causes of Motorcycle Forum Flame War, you are only half right. It is true that synthetic car oil with friction modifiers (thank your politicians and the EPA) can do bad things to our clutches. So don't use them. However, using a motorcycle-specific synthetic is a good idea. I have used synthetic oil in all my 4-stokes and those of my friends, and without fail, every one of them shifted better after the switch. I have never seen a clutch problem as a result of using bike-rated synthetic. As an aside, I leave the stock oil in a brand-new bike for the break-in period, then switch to the good stuff. There is a plethora of info on this very topic at www.amsoil.com. --rd606 "Smoke 'em if ya got 'em"