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Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
🔥Spend $100, Save $10 - Use Code:
WYLD10 at Checkout
Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
Bikers Choice L87-03 XL Chrome Rear Master Cylinder Replaces H-D 42456-87C
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.- Part Number: BKC601770
- Type: Rear master cylinder
- Finish / Color: Chrome
- OEM cross reference: H‑D 42456‑87C
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Evan S –
Excellent OEM replacement. Fits perfectly, functions flawlessly, and the chrome finish matches my other parts.
John Stieb –
Quality master cylinder at a fair price. Bled easily and brake feel is firm and responsive.
Lynn –
Love this cap. The LED readout is easy to see and it’s given me useful information about my engine’s temp.