Mine are 2005 2006 King Quads and a 2010 PoPo. The 1st replaced some older Sport quads once I felt I was getting to old and sore.... At the rate my King Quads are going I don't expect that I will need to replace them anytime in the next 10000 miles!
My 2000 Quadrunner 250 is going on 12 years old.
I just bought it from my father who pretty much used it for ice fishing. Its seen the trails only a few times.
It only had 281 miles on it when I bought it!