I currently ride a YZ250. For the mx tracks I ride on, tight corners with fairly short straights, I feel I need a bit more torque from the motor to make up for my lack of momentum through the corners. I have read all the threads regarding the YZ285, most seem related to off-road/trail riding. I would be interested in comments on the motor from anyone use a 285 on the mx track. Does the motor gain bottom and a smooth roll on or does the bike become a mid-range bike with a big hit? Jetting also seems to be problematic? Is the increase in performance worth the investment? The alternative is a TM300MX, but the I love the handling of the YZ.