I purchased this sled untested in the spring and since then I have replaced plugs, battery, new studded track, windshield, chain case oil, adjusted rear suspension and cleaned the power valves. It has just shy of 6000 miles on it with equal compression about 115 psi with a cheap tester. It runs and idles smooth, but when I loaded it onto my trailer just today, I let it idle for about 5-10 minutes while I checked everything over and found antifreze coming from the exhaust and some slight puddling underneath . I had notice the bottle was about 1/4 inch low since I topped it up in the springtime at time of purchase. Thinking o rings in one of the heads? Or worse?