I've just got a quick question that seems kinda stupid, but I'm going to ask it anyway. Should I be using a semi-synthetic oil in my 00 YZ 426? I have been running a synthetic/petroleum blend with moly specifically designed for motorcycles in my bike, but I think I remember hearing somewhere that synthetics could cause clutch problems. I have been having some trouble with notchy shifting, which is what made me think about it. I pulled my clutch cover off to inspect the clutch (I also heard about the exploding basket problem some of these YZ's have) and found nothing too unordinary. There were some small scratches in the clutch basket but nothing major. I haven't pulled the basket yet because I don't have a socket big enough or a clutch holding tool. Should I perform a further inspection on my clutch and/or switch to a different oil? Any help and/or info would be appreciated.