{"product_id":"vortex-racing-v4-45-tooth-520-rear-sprocket-black-1","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 final-drive performance with the Vortex Racing V4 45-tooth 520 rear sprocket, part number vtx642AZKV4-45. Designed as the next generation of Vortex aluminum rear sprockets, the V4 builds on the proven CAT5 platform with a lighter, more aggressive profile. Reduced rotating mass can help improve acceleration, throttle response, handling, and overall agility for street riding, track use, and other performance applications.\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e  \u003cli\u003eExcellent concentricity supports smooth, quiet operation and efficient power transfer\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003ePrecision-machined from high-strength 7075-T6 aluminum for dependable performance\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003e10–15% lighter than the Vortex CAT5 sprocket design\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eManufactured in the USA\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003eThis black Vortex Racing V4 sprocket uses a 520 chain size and a 45-tooth configuration for reliable fitment and consistent drivetrain operation. Its precision construction helps maintain accurate chain engagement while the reduced weight minimizes unsprung and rotating mass at the rear wheel. The sprocket is suitable for riders seeking responsive performance without sacrificing the smooth operation expected from a high-quality replacement component.\u003cbr\u003eThe Vortex Racing vtx642AZKV4-45 fits select Yamaha motorcycles, including the 2021–2024 MT-09, 2021–2024 MT-09 SP, and 2022–2024 XSR900, as listed below. Confirm the motorcycle year, model, chain size, tooth count, and mounting specifications before installation. Professional installation is recommended to ensure correct alignment, chain tension, and torque settings.\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: Vortex Racing\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: vtx642AZKV4-45\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSprocket Series: V4\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTooth Count: 45 teeth\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eChain Size: 520\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Precision-machined 7075-T6 aluminum\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Black\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eWeight Advantage: 10–15% lighter than CAT5\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eManufacturing: Made in the USA\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFitment: 2021–2024 Yamaha MT-09\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFitment: 2021–2024 Yamaha MT-09\u003c\/li\u003e\u003c\/ul\u003e SP\u003cul\u003e\u003cli\u003eFitment: 2022–2024 Yamaha XSR900\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\nYamaha MT-09 Base 2018\u003cbr\u003e\nYamaha MT-09 Base 2021\u003cbr\u003e\nYamaha MT-09 Base 2022\u003cbr\u003e\nYamaha MT-09 Base 2023\u003cbr\u003e\nYamaha MT-09 Base 2024\u003cbr\u003e\nYamaha MT-09 Base 2025\u003cbr\u003e\nYamaha MT-09 Base 2026\u003cbr\u003e\nYamaha MT-09 SP Base 2021\u003cbr\u003e\nYamaha MT-09 SP Base 2022\u003cbr\u003e\nYamaha MT-09 SP Base 2023\u003cbr\u003e\nYamaha MT-09 SP Base 2024\u003cbr\u003e\nYamaha MT-09 SP Base 2025\u003cbr\u003e\nYamaha MT-09 SP Base 2026\u003cbr\u003e\nYamaha XSR900 Base 2016\u003cbr\u003e\nYamaha XSR900 Base 2017\u003cbr\u003e\nYamaha XSR900 Base 2018\u003cbr\u003e\nYamaha XSR900 Base 2022\u003cbr\u003e\nYamaha XSR900 Base 2023\u003cbr\u003e\nYamaha XSR900 Base 2024\u003cbr\u003e\nYamaha XSR900 Base 2025\u003cbr\u003e\nYamaha XSR900 Base 2026","brand":"Vortex Racing","offers":[{"title":"Default Title","offer_id":67598400291132,"sku":"vtx642AZKV4-45","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1865\/9007\/files\/7d08cc7e82f75e98c8dd04025f3b4eceL_d29cb37b-8afa-48b1-82e3-1e29a5999cb6.jpg?v=1790646910","url":"https:\/\/necycleshop.com\/products\/vortex-racing-v4-45-tooth-520-rear-sprocket-black-1","provider":"NE Cycle Shop","version":"1.0","type":"link"}