[ccobra8]

I used Ams oil for motorcycles in mine. I did not flush it just changed it and have had no problems yet. It is almost to the second oil change. The friction inhibiters some one metioned in energy saving oils will impregnate the clutch plates and make them slip. I was working on motorcycles when these oils came out and we put a lot of clutches in a lot of bikes until we figured out what was causing the slipping. Just make sure the oil is for a wet clutch and it will work fine!