the only times the fan runs are in the middle of summer on the desert. It is probably the best all around ride around. Not as quick as the shee, not as racy as the yfz. It is WAY better looking than both. It is a very comfortable ride. Go with the pro flow and some type of silencer. Is it a 250 R or one of the 450's on the track? No! Are you a pro racer? No! Is it the 400ex and nearly bullet proof? No, but it is pretty good. Remember, buy the quad for what you do. Tracks-450r or yfz. Dunes- shee. Trails- raptor. Desert-DS. most important, you will never be the fastest, you will never be the best, you will never have the coolest ride so just have fun and enjoy whatver you get!