my brother has a grizzly 350 dont know the year but it was the first they made it, it has done this since he bought it, and has been to the shop many times since then for them to tell him there is nothing wrong with it. at the end of the summer last year we were all riding after a couple hours it got so hot the dip stick melted and blew out (him and his gf had on shorts and burnt all their skin off) we havent messed with it till today. i got new oil and dipstick and after 2 mins of riding it around at work to check the oil it had almost melted the new stick, its getting very hot!! any ideas what could cause it? i was goin to straight wire the fan on the oil cooler and just let it run all the time or put a toggle switch on it, but im pretty sure the fan is kicking in. help me out guys, he wants to take his gf's kids riding this weekend and we dont need that to happen again.