Moving on to the biggest bike in the SX-F lineup, the 450 was my least favorite. The reasons were the fork and engine. Starting with the fork, I felt that it did not offer much rider comfort for my weight. One of the biggest characteristics I look for in a bike is a plush ride, and I want a bike that offers as much rider comfort as possible. Being more of a 250F rider, I want very smooth, less scary, linear power on the bigger bike. The 450 was just a little too aggressive for my liking, and I was more timid on this machine out on the track. I felt it had a very hard-hitting power delivery and was a very solid motor, but I think the 450 SX-F is geared more toward bigger riders and/or riders who have had time on big bikes.