I bought a used 2007 Roketa Bali 250 and it seemed like a great deal and road nicely on the test drive, so I bought it. A day later on a longer ride than the first, the thing started overheating, I could smell something burning and the gauge was all the way to hot. I checked the oil and it was a bit down so I filled it up and put antifreeze in the plastic container. I then took it for another ride and although it took longer, it still reached the hot point on the gauge. Anybody have this problem? Any advise?