So I ride about 40 miles on the interstate each day with a 15/45 sprocket set @ appx 70 mph... I noticed that my exhaust shield had oil on it today, Most of it was on the top (I wiped it off before the shot) and you can see where the rest of it is... It is no where else on the motor.. I went over the engine and checked to see if I could find where the gasket was compromised, but I could not... Is there anything else that could cause this other than a compromised middle gasket? What the hell?