2007 Moto Wars
2007 MOTO WARS
NOT ONLY have motocross bikes never been better, they continue to improve. See for yourself. This year, Kawasaki joined the big-bore Thumper crowd with its brand-new KX450F. Despite first-year status, it was a threat to the class leaders.
For 2007, alterations were aimed at making the KX a home run. Biggest change: The previous four-speed transmission is out and a new five-speed is in. Power was increased in the lowto mid-rpm range, and gearbox modifications improve shift action.
As for the chassis, the aluminum frame was altered for improved handling, and a diamond-like carbon coating (DLC) was applied to the fork sliders. Commonly found on high-end sportbikes, the coating reduces friction and smoothes action. Also, the fork has larger damper cartridges and revised valving. All for $6899.
Suzuki made similar chassis and engine revisions to the RM-Z450 ($6799). A Carmichael Replica ($6999) differs from the standard model by way of its Makita Suzuki graphics, gold-colored rims and the multi-time MX and Supercross champ’s signature #4 on the number plates.
Suzuki’s main focus was on an all-new RM-Z250 ($5999). A new twin-spar aluminum frame based on that of the 450 includes a 47mm, twinchamber Showa fork. Power is supplied by a four-valve, dohc, 249cc four-stroke Single breathing through a 37mm Keihin FCR carburetor-no fuel-injection yet. Claimed dry weight is 203 pounds.
Yamaha continues to offer theYZ250F and YZ450F in two colors.
For ’07, the choices are blue/ white and white/silver. At presstime, prices had not been TJ announced,
% but the latter hue will carry a $ 100 premium. As with Kawasaki and Suzuki, Yamaha revised its aluminum frame to improve handling, specifically cornering. Power
was tweaked to reduce sound levels and improve lowto mid-rpm punch. Other changes include new wave-style brake rotors, new radiator support brackets and a taller handlebar. Claimed dry weight is 218.5 pounds, a loss of 1.5 pounds.
Looks like it’s going to be another great year on the track. Ryan Dudek
