Upgrade or restore your Sportster’s rear braking system with this direct OE‑replacement rear master cylinder from Biker’s Choice. Finished in bright chrome, it offers both genuine functionality and a clean, show‑ready look for Harley‑Davidson Sportster models from the late ’80s through the early 2000s.A chrome rear master cylinder assembly that replaces Harley‑Davidson OEM part number 42456‑87C, designed for a precise fit on the specified Sportster years and trims. This unit is built to OEM standards and sold as a complete rebuild kit or assembly, giving you the internal components needed to renew the cylinder’s performance.
Key benefits
Straightforward OE fit: specifically replaces OEM 42456‑87C, making it a practical swap when the original is worn, leaking, or cosmetically tired.
Durable, attractive chrome finish: preserves a factory‑style look and resists corrosion, ideal for rides where both function and appearance matter.
Broad, confirmed fitment: covers many XL and Sportster variants, including 1987–2003 models across several trims such as XLH, XL1200, XL883, Hugger, Custom, Sport, Deluxe, and Roadster—see the listing for the full, specific fitment.
Ready to ship: listed as in stock with quantity shown, helping you avoid long delays when ordering.
Ideal use case
Perfect for owners doing a brake system refresh, restoring an older Sportster, or replacing a master cylinder that’s no longer reliable. The chrome housing keeps the bike looking clean, while the OE‑style replacement keeps braking performance consistent and dependable.
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