Kawasaki has completely redesigned the 600-class Ninja for 2007 and made some surprising changes of strategy along the way. Gone is the 636cc version that compared favorably to its 600cc competitors because of the extra torque from its displacement advantage. Instead, Kawasaki has returned to the Supersport racing-based formula of a 600cc inline four-cylinder.

That made Kawasaki's job harder. Not only did the 2007 Ninja have to have enough midrange to compare to its 636cc predecessor, but it also meant Kawasaki wouldn't have a separate model, like it did with the 2006 ZX-6RR, to serve as the basis for its AMA Supersport racebike. The pressure was on to come up with a single motorcycle that could fill both roles, so Kawasaki did the first clean-sheet complete redesign of its 600cc powerplant in 10 years, along with an all-new chassis.

Kawasaki has completely redesigned the 600-class Ninja for 2007 and made some surprising changes of strategy along the way. Gone is the 636cc version that compared favorably to its 600cc competitors because of the extra torque from its displacement advantage. Instead, Kawasaki has returned to the Supersport racing-based formula of a 600cc inline four-cylinder.

That made Kawasaki's job harder. Not only did the 2007 Ninja have to have enough midrange to compare to its 636cc predecessor, but it also meant Kawasaki wouldn't have a separate model, like it did with the 2006 ZX-6RR, to serve as the basis for its AMA Supersport racebike. The pressure was on to come up with a single motorcycle that could fill both roles, so Kawasaki did the first clean-sheet complete redesign of its 600cc powerplant in 10 years, along with an all-new chassis.

I guess roger knows more than the magazines.
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Jason

Tony Meiring re-signs with Kawasaki for two more years
Tony ‘The Tiger’ Meiring will return to Kawasaki for the 2003 and 2004 seasons and contest the AMA Supersport and Superstock Championships. The 18-year-old rider impressed many last year in his first year as a factory rider and even scored a podium when he finished second at Pikes Peak in the Supersport race there. “I’m really happy to be back with Kawasaki. Their new 636 and 600s are going to be winning bikes, that’s for sure. Last year was a good learning year and I’m going to try to win as many races as I can on the new Kawasakis.”
Although the AMA season ended a month ago, Tony has been training hard in early preparation for next season and is anxious to race Kawasaki’s new ZX-6RR, a bike which he believes will impress many Kawasaki owners and fans. “That new 600 is going to be such a hit for Kawasaki. It’s a race-built bike. It’s very comfortable to ride, but it will also be a great bike to race. When I rode it a few weeks ago, I was able to light up the rear tire. For a stock 600, the power and handling were just incredible. And that new 636 was impressive too. It will certainly help me when I race it in the Superstock class next year”