BREA, Calif. - American Suzuki has announced updated RM-Z450 and RM-Z250 motocross models for 2013.
The 2013 RM-Z250 features a redesigned chassis and suspension, including the new Showa Separate Function Front Forks (SFF), which separates the spring and damping functions. The right leg holds the spring, while the left leg incorporates the cartridge assembly to manage damping. Suzuki claims the setup reduces friction, increases absorption performance, and lowers weight for “remarkably smooth performance over a variety of tracks.” The Showa SFF also offers fully adjustable spring preload.
Suzuki revised the RM-Z250 engine’s piston, connecting rod and piston pin, as well as updated the intake and exhaust cams. The result, the company claims, is improved midrange torque and acceleration.
Additionally, the RM-Z250 is equipped with a new five-speed transmission with revised gears and shift cam for smooth, precise shifting and a revised clutch release cam shape for improved clutch feel. New Dunlop MX-51 tires complete the package with reportedly increased traction over a wider variety of terrain.
The 2013 RM-Z450 also has an updated engine with a lighter piston, a revised piston pin and connecting rod, and a new intake cam to “provide stronger midrange torque and crisper throttle response.”
A RM-Z450 transmission update features revised gear shapes to second, third, fourth and fifth gears, along with a new shift cam to help deliver smoother and more precise shifts.
The RM-Z450 also comes with the Showa Separate Function Front Forks, which separates the spring and damping functions, and features fully adjustable spring preload. Suzuki says the RM-Z450 is the only production 450-class motocross bike with this fork design.
The new front suspension works with an updated twin-spar aluminum frame to “further optimize the balance between rigidity and high-speed traction,” Suzuki says. “This provides riders with incredibly precise handling and smooth performance on the toughest of tracks.”
Both RM-Z models include two electrical couplers (one rich and one lean coupler) that allow the rider to adjust the fuel setting quickly to suit track conditions. Fuel settings can be changed to best suit the riding conditions by connecting either coupler, without tools. A new option for 2013: Riders can now track engine-operating time and better manage maintenance intervals using Suzuki’s optional FI indicator light.
Suzuki also has announced the return of the youth RM 85 and RM85L models for 2013.
Posted by Arlo Redwine
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