I was riding 2 days ago on a side trail and the slides were heating up. Also the engine started over heating but I was close to the main trail which had lubrication and so around 50 yards of riding on the main trail the over heating light went off. So it was not good going of trail 2 days ago unless you had ice scratchers. But I'm not sure if that would help the engine from over heating.Looks like a good day, I rolled 12,000 this season on my apex. Tried to ride to rockwood last Saturday from forks but hit some nasty trails of RT 66 and turned back because my buddys nitro kept overheating as temps below 0 with little lube. Sled looks great!