{"product_id":"bikers-choice-73-81-bt-xl-chrome-handlebar-master-cylinder-replaces-h-d-45010-73-3-4-inch-bore","title":"Bikers Choice Chrome Handlebar Master Cylinder with 3\/4\" Bore for 73–81 Harley BT \u0026 XL","description":"\u003cp\u003eReliable braking performance with a chrome handlebar master cylinder for 1973–1981 Harley Big Twin and Sportster models.\u003c\/p\u003e\n\u003cp\u003eThe Bikers Choice Handlebar Master Cylinder is a high-quality replacement unit designed to match and function like the original Harley-Davidson part number 45010-73. Built with a 3\/4-inch bore size, this chrome-finished master cylinder fits 1973–1981 Big Twin (BT) and XL Sportster models with single-disc front brakes. It mounts directly on the handlebar and is engineered for smooth, consistent brake operation. The polished chrome housing not only improves durability but also complements classic Harley styling. Its construction meets or exceeds OEM standards for both performance and reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment:\u003c\/strong\u003e Designed for 1973–1981 Harley-Davidson Big Twin and XL Sportster models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOEM Replacement:\u003c\/strong\u003e Replaces Harley part number 45010-73 for single-disc brake setups\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eChrome Finish:\u003c\/strong\u003e Durable polished chrome body matches vintage Harley aesthetics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e3\/4-Inch Bore:\u003c\/strong\u003e Ideal for consistent front brake pressure on compatible models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHandlebar Mount:\u003c\/strong\u003e Fits standard bars with a bolt-on installation design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt to Last:\u003c\/strong\u003e High-quality construction for long-term braking performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis master cylinder offers a functional and visually appealing solution for restoring or maintaining braking control on vintage Harley models.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Bikers Choice","offers":[{"title":"Default Title","offer_id":50674574328121,"sku":"BKC601554","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/0903\/3273\/files\/3b64c5bf26cb4882db4d628145c4e5ae.png?v=1745184559","url":"https:\/\/tuning4.com\/products\/bikers-choice-73-81-bt-xl-chrome-handlebar-master-cylinder-replaces-h-d-45010-73-3-4-inch-bore","provider":"Tuning4 Auto Parts","version":"1.0","type":"link"}