Just bought a 2003 YZF 450 that was used in the racing circuit. Going through and checking all major areas, incl. doing an oil chg. When I pulled the plug, *very* black oil that smelled like it had gasoline in it, came out. I finished w/ the chg, and went to pull the dip-stick to check my levels, when oil came pouring out of the dip-stick holes. Any help w/ what may be going on here? How much oil goes into these 450? thanks.