2013 Suzuki Motocross Lineup

Information provided by Suzuki

2013 Suzuki RM-Z250

The 2013 RM-Z250 features a redesigned chassis with new suspension, including the Showa Separate Function front Fork (SFF), which separates the spring and damping functions. The right leg holds the spring (with fully adjustable spring preload), while the left leg incorporates the cartridge assembly to manage damping. The engine received a newly designed piston and piston pin, which was developed using Finite Element Method (FEM) analysis. The new piston is 3% lighter without any compromise to strength and integrity. The crankcase reed valve was revised for more efficient lubrication and the new oil strainer has a stronger magnet to capture contaminants from the engine oil. Together these changes contribute to better throttle response and smoother power delivery. The RM-Z250 motor also received updated intake and exhaust cams. All the engine changes were aimed at improving mid-range torque and acceleration. The five speed transmission now has revised gears and shift cam for smooth and precise shifting. A revised clutch release cam shape improves clutch feel. The cooling efficiency was increased with redesigned radiator fins and revised water hose routing. The RM-Z250 also features a new by-pass hose routing to simplify occasional radiator maintenance. Dunlop MX-51 tires complete the changes.

2013 Suzuki RM-Z450

For 2013, the RM-Z450 powerplant has a new, lighter piston, revised piston pin and connecting rod as well as a new intake cam. The newly designed piston, piston pin and connecting rod were developed with use of Finite Element Method (FEM) analysis. The new piston is 13 percent lighter without any compromise to strength and rigidity. The new piston pin has Diamond-Like Carbon (DLC) surface treatment for less friction and increased durability. The new design reduces mechanical loss and helps the engine produce quicker throttle response. The intake cam timing and amount of lift was also modified for smoother power delivery and control. The changes were made to provide crisper throttle response and stronger mid-range torque. The transmission didn’t go untouched for 2013, revised gear shapes to 2nd, 3rd, 4th, and 5th gears, along with a new shift cam, improve durability and provide smoother shifting. The RM-Z450 also comes with the all-new Showa Separate Function front fork (SFF), which separates the spring and damping functions, and features fully adjustable spring preload. This makes the RM-Z450 the only production 450-class motocross bike with this fork design. The new front suspension works in conjunction with the updated twin-spar aluminum frame. Out back the muffler’s internal parts were redesigned to increase bottom-to-mid range power and torque without losing top end. The new muffler body now uses conventional bolts in the end cap instead of rivets to simplify the replacement of the glass wool packing in the muffler.

Both RM-Z models include two electrical couplers (one rich and one lean coupler) that quickly allow the rider to adjust the fuel setting to suit track conditions. Fuel settings can easily be changed to best suit the riding conditions by just connecting either coupler, all without using tools. A brand new option for 2013 – riders can now easily track engine-operating time and better manage maintenance intervals using Suzuki’s optional FI indicator light (Part no. 36380-28H00).