Hey guys, I don't know if the original started of this thread reached a conclusion or not, but I was hoping maybe some of you can give some insight to me as well.
I have the same problem with my 2000 sportsman 500 overheating. It started with the light coming on, which was after about an hour of moderate riding. I was towed home because I couldn't see inside the coolant reservoir and thought I was just out of coolant. So I picked up antifreeze at the local atv shop and came home to fill it up... It was fine.
So, I checked the fan by putting 12V to it and it kicked right on. I let the quad idle for about 15-20 minutes and antifreeze started squirting out of the pinhole on the coolant reservoir cap. I don't know where the sensors are/what they look like or how to check them. I'm guessing the black box with 4 wires coming out of it is one of the sensors. How do I check if that's functioning properly?
Also, unrelated to that problem, I had a right wheel bearing installed because from that side I was hearing loud clicks most of the time and all of the time when I would turn hard to the right. The people who installed it didn't put oil in the hub, just grease. It started clicking again after 1 or 2 rides from the installation. I called them up and they said the nut holding them in probably just needed to be tightened a little more. I unscrew the rubber cover and that's when I noticed there was no oil. I tightened it up a little bit and then retried, still clicking. Then I unscrewed the left side just to check how tight the nut should be, and that's where I found out the right side should have had oil, because the left side was full. Now, is it possible I just need oil put into the right hub or did not having that ruin the new bearing and I need to replace it again?
Anyway, even if no one is able to answer my questions I still learned a bunch just from the little I read, so I appreciate everyone's input.
Thank you!