Reliable braking performance with a chrome handlebar master cylinder for 1973–1981 Harley Big Twin and Sportster models.
The 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.
Key Features:
Vehicle Fitment: Designed for 1973–1981 Harley-Davidson Big Twin and XL Sportster models
OEM Replacement: Replaces Harley part number 45010-73 for single-disc brake setups
Chrome Finish: Durable polished chrome body matches vintage Harley aesthetics
3/4-Inch Bore: Ideal for consistent front brake pressure on compatible models
Handlebar Mount: Fits standard bars with a bolt-on installation design
Built to Last: High-quality construction for long-term braking performance
This master cylinder offers a functional and visually appealing solution for restoring or maintaining braking control on vintage Harley models.
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