In the August 2000 issue of dirt bike it tells how the 250f was developed from the yz125 frame, swingarm, rear rim, clutch and even the 125 crank. However the engine is obviously downsized from the 400, they still used the 5 valve engine. The bore had to be large enough on the 250 to accomidate room for 5 valves to be used. So Yamaha created the yz250f with a very large bore and very short stroke and 13,500 rpm limit. My questions is in the past what type of engine power is most closely related to a large bore and a short stroke with high rpm's. Is this going to give more torque or HP than ussual. What other characteristics do you see coming from this engine?