{"product_id":"harddrive-cush-drive-chain-conversion-kit-51t-sprocket-silver-for-conv-kit-820-51159","title":"Harddrive Cush Drive Chain Conversion Kit - 51t Sprocket Silver FOR Conv KIT — Harley-Davidson (1955-2026)","description":"\u003cp\u003eHarddrive cush drive chain conversion kit with 51-tooth rear sprocket for V-twin cruisers and touring bikes. Complete kit includes hub adapter plate, spacer, bearing, and both rear and transmission sprockets, geared lower than stock to increase usable torque in the mid-range RPM band.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCNC-machined billet aluminum hub adapter plate\u003c\/li\u003e\n  \u003cli\u003eHeat-treated steel sprockets for durability\u003c\/li\u003e\n  \u003cli\u003e51T rear sprocket and 24T transmission sprocket included\u003c\/li\u003e\n  \u003cli\u003eLower gear ratio for increased mid-range power\u003c\/li\u003e\n  \u003cli\u003eSpacer and bearing assembly included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harddrive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 201400\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 191361374401\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRear Sprocket Teeth:\u003c\/strong\u003e 51\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission Sprocket Teeth:\u003c\/strong\u003e 24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.4 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 10.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 0.75 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China (Taiwan)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits V-twin cruisers and touring motorcycles with cush drive rear hubs. Verify your bike's hub type before ordering.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat chain do I need for this conversion kit?\u003c\/h3\u003e\n\u003cp\u003eA 530x130-link chain is recommended. You'll need to size and cut the chain to fit your specific model — chain sold separately.\u003c\/p\u003e\n\u003ch3\u003eWhat's included in the kit?\u003c\/h3\u003e\n\u003cp\u003eHub adapter plate, spacer, bearing assembly, 51-tooth rear sprocket, and 24-tooth transmission sprocket.\u003c\/p\u003e\n\u003ch3\u003eHow much lower is the gear ratio compared to stock?\u003c\/h3\u003e\n\u003cp\u003eThe kit is geared lower than your bike's 6-speed transmission to deliver more usable power in the mid-range RPM band.\u003c\/p\u003e\n\u003ch3\u003eDo I need any special tools to install this?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires basic motorcycle maintenance skills and tools. The kit includes all necessary hardware; however, chain sizing and installation may require shop assistance if you're unfamiliar with the process.\u003c\/p\u003e\n\u003ch3\u003eWill this work on my specific V-twin model?\u003c\/h3\u003e\n\u003cp\u003eThis kit fits V-twin cush drive hubs. Verify your bike uses a cush drive hub and check fitment specs before ordering, as different models may have varying hub designs.\u003c\/p\u003e","brand":"Harddrive","offers":[{"title":"Default Title","offer_id":53035971936367,"sku":"820-51159","price":117.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_a933110d-14b8-4ee7-b247-77d52f4f4d76.png?v=1779564053","url":"https:\/\/vtwinbikers.com\/products\/harddrive-cush-drive-chain-conversion-kit-51t-sprocket-silver-for-conv-kit-820-51159","provider":"Vtwinbikers","version":"1.0","type":"link"}