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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Check out the new Yamaha '08 WR250R & WR250X Supermoto street-legal bikes!!
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[QUOTE="Rich Rohrich, post: 1227111, member: 16241"] They have a black version for the European market that looks pretty good too. The Yamaha Europe website is claiming 29.9 hp @ 10,000 rpm and 17.48 ft/lb torque. That's lower than a stock YZ250F but not by that much, maybe 10-15%. To put this into perspective I pulled an old issue Cycle magazine from 1973 where they tested the latest model RD350. RD350 Weight - 351 wet & Max horsepower 29.82 @ 8000 rpm & down to 25 horsepower @ 9000 rpm. The usable torque of the RD was about half the effective rpm range that we'll see from a good 250f design. As those of you who have ridden the old RDs know, they accelerate like a scalded dog, and are about as much fun as short haul street bikes get. Given the fact that the WR250X has a serious street legal exhaust system on it and probably has the EFI mapped to pass the EURO 3 emissions standards (or comes close), yet still makes this kind of power bodes well for the potential of this new engine design and points to how well the new downdraft cylinder head flows. One thing is for sure, this thing will be some serious fun! I can't wait. :yeehaw: [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Check out the new Yamaha '08 WR250R & WR250X Supermoto street-legal bikes!!
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