Kits feature RK's premium, lightweight RX- or XW-ring sealed racing chain in either gold or natural finish. Includes a premium Driven® C45 steel alloy black case-hardened rear sprocket paired with Driven® C45 steel case-hardened and quenched front. Chain & Sprocket 520 Conversion Kit. For MORE GREAT DEALS on Vintage and Classic Cycle Parts! Your friends at Classic Cycle Parts appreciate your Business!This item is in the category "eBay Motors\Parts & Accessories\Motorcycle & Scooter Parts & Accessories\Transmission & Drivetrain\Final & Primary Drive Parts & Kits\Other Belt, Chain & Sprocket Parts".isell" and is located in this country: US. This item can be shipped worldwide.