I have a 2007 Aprilia RXV550 I use as an Ice Racer. I went to change the oil the other day. I started it. It ran fine with no smoke, steam, fluid, or anti-freeze smell coming from the pipes. When I drained the engine oil, it was obviously an oil/coolant mix. (Attached is a pic of the drained oil). I then checked the radiator and it was dry. Anyone know where I should start looking for the problem? Is there a common problem with this model? I was sold this bike new in 2011 at a greatly reduced price. I was told the bike originally had major problems in the motor, and was recalled, but that they were sent back to the factory and "fixed". Thanks to anyone that can help!