Drag Specialties Rear Master Cylinder Rebuild Kit – Harley Sportster XL 883 / 1200 (2004‑2006) – Repl. 42810‑04 – Includes Metal Piston

OVERVIEW

This Drag Specialties rear master cylinder rebuild kit provides a precision replacement for degraded braking components on Harley-Davidson Sportster motorcycles. Built with high-quality materials and a reinforced metal piston, this kit addresses critical wear points while maintaining rigorous manufacturing standards. Designed as a direct replacement for OEM part number 42810-04, it ensures reliable hydraulic performance and extends service intervals for the Sportster model family.

ENGINEERING & PERFORMANCE

Replacing worn internal components, this kit restores firm brake pressure and eliminates spongy pedal feel associated with fatigued rear master cylinders. The installation of a durable metal piston enhances structural resilience over time, offering superior wear resistance compared to standard rebuild parts. Engineered to meet or exceed original equipment specifications, the assembly delivers consistent operational behavior as a straightforward bolt-in repair that returns factory-level braking control.

KEY FEATURES

• Rear master cylinder rebuild kit engineered for Sportster compatibility
• Includes a metal piston for increased durability and extended lifespan
• Direct replacement for Harley-Davidson OEM part 42810-04
• Performance meets or exceeds OEM specifications
• Restores proper brake pressure and responsive pedal feel
• High-quality construction designed for long-term reliability

TECHNICAL SPECIFICATIONS

• Brand: Drag Specialties
• Part Name: Rear Master Cylinder Rebuild Kit
• OEM Reference: 42810-04
• Piston Material: Metal
• Supported Years: 2004–2006
• Compatible Harley Trim: Sportster

FITMENT

• Harley Sportster (2004–2006)

WHY HARLEY RIDERS CHOOSE THIS

Riders choose this rebuild kit because it effectively corrects declining rear brake performance without the expense of purchasing a complete new assembly. The transition to a metal piston removes soft pedal symptoms and delivers consistent engagement, reinforcing long-term dependability under regular riding conditions. As a verified OEM-spec solution, this kit maintains authentic handling characteristics and stops reliably across the 2004–2006 Sport lineup.