Vortex HFRA Hyper Fast 520 Conversion Chain and Sprocket Kit CK6293. Quot HFRA quot (Hyper Fast) 520 conversion kits with 1 down in front 2 up in rear gearing with Hardcoat aluminum rear sprocket and RV3 Vortex chain. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle & Scooter Parts & Accessories\Transmission & Drivetrain\Final & Primary Drive Parts & Kits\Final Drive Kits". The seller is "atvunlimited" and is located in this country: US. This item can be shipped worldwide.