Wiseco Piston Ring for 1986 08 Polaris 340 440 Models 63mm 2480CS Piston Size_79.97mm Product Details Tire Diameter Speed Product Details Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Product Line Cometic Bottom End Gasket Kit Part Number C3315 Fitment Type Unit Sale Qty Kit 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 California Air Resource Board Compliance FALSE Product Disclaimer ESR350 is a modern regulator rectifier that replaces both original (mechanical) regulator and rectifier on the early Yamaha XS650 models Wiseco Performance Piston Rings Note: Ring Sets come "Per Piston" and may be only a singular ring if only a single ring is applicable