Hi, Just bought myself a used 2003 YZ450F. Enjoying so far. Just went to do an oil change and realized something is amiss... No oil fill location??? Here me out: I think the guy I bought it from replaced (for whatever reason) the leftside crankcase cover with the one for the 2002 YZ426F - a bike with the oil fill on the upper frame. Doing this, I have lost the oil fill port that is supposed to be on the leftside crankcase cover on the YZ450F. I'm wondering how to get the oil in there now. Can I: Put the bike on its side and fill in the oil filter location? Put the bike on its side, open the right crankcase cover at the clutch, and fill oil there? Fill oil through the DipStick location on the frame? Any suggestions are greatly appreciated. My thinking is that I'd like to avoid purchasing the spec leftside crankcase cover for +$100 if I can manage without. http://i668.photobuc...ks/SNC00105.jpg ^^^ What a 2003 450F should look like http://www.dirtbiker...maha-YZ426F.jpg ^^^ What a 2002 426F should look like http://i1267.photobu...0531_184003.jpg ^^^ My 2003 450F. Note the crankcase cover matches the 426F... THANKS!