If you sit down and figure power to weight on 2003 MXZ 800 and new Yam- Rx-1 1000 the Doo is 454 lb dry at 135hp avg. unless changes for 2003, and Rx1 is at least 540, most likely 550 with battery, at 145 or 150. That gives the Doo a full 10% power to weight edge, and way less rebuild costs than the Yamaha, and 14.5" rear suspension, and lighter front end. Just some thought to ponder. Now if Doo would release a DFI triple, that power to weight difference would be in the 20 % range, in a 500lb. chassis! I'm talking of a Doo 1000 2 stroke.