Thought I'd share this...
Last season I rode all season with no issues overheating...toward the end of the season we did a big ride that involved more mud then usual. I ended up overheating during that ride and it was terrible because we were hours from home...I'd ride 10 minutes stop for 15 to cool down then start again. After that ride I hosed out my radiator from the front and rear the best I could, and never over heated again that season.
Now next weekend we are getting ready to go on a big ride...cover the same areas that we did last season when I overheated. So I figured I would be ready this year by tearing my radiator out, really cleaning it and I'm going to try straight water with water wetter this year instead of the 50/50 coolant.
Yesterday I started to tear the radiator out. Got the fan out and couldn't believe my eyes. Even with srpaying the radiator out with a hose multiple times, going to the car wash once and using the pressure washer to clean the radiator...it was still CAKED with mud! Check out the pictures!
Needless to say, I took the radiator completely out, soaked it in a bucket and hosed it down repeatedly.
Just goes to show that running a hose in there really doesn't do the job when you get into some heavy mud!
Mine - 2007 Sportsman 800 - 27" Mudlites on SS rims, HID's, 3 headlight mod w/ relay, 2500lb winch, 4 gal rotopax, PowerMadd hand guards
Wife's - 2010 Polaris Sportsman 500 HO - HID's, 3 headlight mod w/relay and 2500lb winch, WES rear seat & kimpex foot pegs, 4 gal rotopax