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.
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