Namura Oversized Piston Kit for 1981 24 Yamaha PW50 41.46mm NX 40005 6 2009 Polaris Ranger RZR 800 LE 2018 KTM 250 SX 2018 KTM 250 SX Product Details Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Product Line Electrosport Plug In Regulator Rectifier Part Number ESR439 Fitment Type Unit Sale Qty Style Material Color Size Finish Position Functional Length Cable Sleeve Length Cable Sleeve Travel Driver Seat Length Passenger Seat Length Driver Seat Width Passenger Seat Width Piston Cylinder Size Piston Size Added Cylinder Stroke Volume Final Engine Displacement Exhaust Configuration Muffler Size Muffler End Tip Style Windshield Height Windshield Width Handlebar Diameter Ca ARB Compliance Non CARB Complaint CARB Compliant Product Disclaimer 2016 Yamaha PW50 Higher silicon content reduces expansion rates and increasesÊwear resistance