Yamaha really should make this bike. It is the best 2 stroke around. I am on my 3rd year and have had no problems, the cylinder plating still looks great. This kit does add horse power but it is still controllable unlike the old 500's. The best thing it adds is the torque, when your off the pipe with the 250, you get a little power when you turn the throttle, you turn more but no more power, that is where the 285 shines, kepp turning and power keeps coming, you can grunt it up hills from almost a standstill in 2nd, or do switchbacks in 3rd all day long.

It will get you lazy and short shift the jumps on the track, but that is ok for us vet guys. Down the stretch I am even with the 450's, and once you hit 3rd gear you will pull from any 250.