Hey everyone I was wondering to see if any basically has a MXZ 440X or knows anything helpful about them. I am currently riding a 99 MXZ 670HO, very fast sled, but i wanted to try the 440X because I heard it can keep up with most sleds until 90mph, is that true? How is the life on them, do they blow quickly? Was there a best year up until 2000? Any info would be great. Also myself and friends ride fast, very fast and extreme.. so it would be going all day long on the weekends through the trails of canada, maine and NH. thanx.