{"product_id":"vortex-racing-v4-45-tooth-520-rear-sprocket-black-2","title":"Vortex Racing V4 45 Tooth 520 Rear Sprocket - Black","description":"The next generation of Vortex aluminum rear sprockets, V4 builds on the long-running CAT5 sprocket platform with a lighter, more aggressive design. Reduced rotating mass improves acceleration, throttle response, handling, and overallagility. Ideal for street, track, and performance applications.\n\u003cul\u003e\n  \u003cli\u003eExcellent concentricity for smooth, quiet operation and efficient power transfer\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined from high-strength 7075-T6 aluminum\u003c\/li\u003e\n  \u003cli\u003e10-15% Lighter than CAT5\u003c\/li\u003e\n  \u003cli\u003eManufactured in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUpgrade your motorcycle’s drivetrain with the Vortex Racing V4 45-tooth 520 rear sprocket, part number vtx775AZKV4-45. Designed for street, track, and performance applications, this aluminum sprocket builds on the proven Vortex CAT5 platform with a lighter, more aggressive profile. Reduced rotating mass helps improve acceleration, throttle response, handling, and overall agility while supporting efficient power transfer to the rear wheel.\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e  \u003cli\u003eExcellent concentricity promotes smooth, quiet operation and consistent drivetrain performance.\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003ePrecision-machined from high-strength 7075-T6 aluminum for a strong, lightweight design.\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eApproximately 10–15% lighter than the Vortex CAT5 sprocket to help reduce unsprung and rotating weight.\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eManufactured in the USA to meet the performance demands of motorcycle riders and racers.\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003eThe Vortex Racing V4 rear sprocket combines durable construction with weight-conscious engineering for riders seeking responsive handling and dependable performance. Its 45-tooth configuration is intended for compatible 520 chain applications, making it a practical choice for replacement drivetrains, track setups, and performance-focused motorcycle builds. The black finish provides a clean appearance while complementing a wide range of motorcycle styles and components.\u003cbr\u003eBefore installation, verify chain size, rear sprocket fitment, mounting pattern, and final-drive requirements for your motorcycle. Changes in sprocket gearing can affect acceleration, top speed, engine speed, and chain length. Install the sprocket according to the motorcycle manufacturer’s service procedures and inspect the chain and front sprocket at the same time for wear. The Vortex Racing V4 45-tooth 520 rear sprocket is supplied as one sprocket and is engineered for riders who want a lightweight, precisely manufactured replacement or performance upgrade.\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003e45-tooth rear sprocket for compatible 520 chain applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePrecision-machined from high-strength 7075-T6 aluminum\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApproximately 10–15% lighter than the Vortex CAT5 sprocket\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eExcellent concentricity for smooth, quiet operation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eReduced rotating mass helps improve acceleration, throttle response, handling, and agility\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eAggressive V4 design for street, track, and performance use\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eManufactured in the USA\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBlack finish\u003c\/li\u003e\u003c\/ul\u003e","brand":"Vortex Racing","offers":[{"title":"Default Title","offer_id":67598414938428,"sku":"vtx775AZKV4-45","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1865\/9007\/files\/7d08cc7e82f75e98c8dd04025f3b4eceL_6a169bd6-7bb5-430f-bf6e-5034cbf1d736.jpg?v=1790647512","url":"https:\/\/necycleshop.com\/products\/vortex-racing-v4-45-tooth-520-rear-sprocket-black-2","provider":"NE Cycle Shop","version":"1.0","type":"link"}