Renthal Ultralight Grooved Rear Sprocket 428 Chain Pitch x 48 Teeth Orange 441U 428 48GPOR 1991 Kawasaki ZX750 Ninja ZX7R Product Details Tire Diameter Speed Product Details Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Product Line Yuasa Yumicron Batteries Part Number YUAM3RH2S 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 California Air Resource Board Compliance FALSE Product Disclaimer 2019 Yamaha YZ 450 F Renthal's combination of a high strength base material and exceptionally hardwearing surface result in significantly increased chainwheel life over other brands Grooved chain wheels have cut outs at the bottom of the tooth to allow the escape of mud that would otherwise be trapped between the chain wheel and the chain