Hi all. I am very new to 4 stroke MX bikes. I just bought a used 2003 yz450f last monday and LOVE it so far. I checked my oil tonite (first time) and it was quite "watery" When I looked closer, I smelled gas! Has anyone seen gas in the oil before? Like I said I am new to this bike, but I know that oil does NOT smell like gas. And I have never seen oil that thin before.