I did not experienced this myself, but a guy told me that his ATV and a few others experience a problem with the 2002 450ES. He says that the speedometer underestimates the speed when going fast, he talked about some king of wheel missing counts in the transmission. He says Honda engineers are working on the problem. I will try to make a run at high speed with my GPS to see if it is true. Anyone heard of this on the 450ES or 450S 2002?