Yamaha 450 kodiak. We have had Yamaha and Polaris in snowmobiles and 4 wheelers and we are much happyer with the Yamaha. Our 1988 Yamaha Big Bear 350 is like a tank. Our 2002 Polaris sportsman 400 rides nice but the suspension is too weak 100 pounds of corn on the back and it is almost impossible to stear.