At first glance I thought too that it was simply an 06 with an ALuminum frame but it's got the 06 YZ motor and is ALL NEW FROM THE GOUND UP apparently!
taken from Cyclenews.com............After introducing the first aluminum-frame YZFs last year, it wasn't too surprising that Yamaha
would follow that up with all-new, aluminum-frame WRs for 2007.
Like last year's YZFs, the WR250 and 450Fs (above) got the works and are completely redesigned from the ground up. They're closely based on their motocross cousins, but have been finely tweaked for enduro-type riding such as going to softer suspension settings and tuning the motor for a smoother power delivery while maintaining YZ-like overall power.
The WR has many unique, off-road-friendly features of its own, such as a quick access, tooless-entry airbox, a thicker seat, a full-coverage, wrap-around injection-molded plastic skid plate
, and an enduro onboard race computer (like it did last year). The WRs also get wider footpegs, new wave disc rotors, a restyled headlight, an LED taillight, new triple clamps, a quick-adjust clutch, and reinforced radiators. Both the WR250F (below) and WR450F are green-sticker-approved for California.
Unfortunately, it’s going to be a while before we start seeing the WRs on showroom floors. The WR450F is scheduled to be released mid-October and the WR250F late November.
The 450 will carry an MSRP of $7199 and the 250 $6399.
Looks real nice!!!!!!!!