Drag Specialties Rear Brake Caliper Seal Kit – Fits Harley FX & Sportster XL (1977–1981) – Replaces OEM 44180‑77 / 44152‑77

OVERVIEW

This rear brake caliper seal kit provides a precise replacement solution for restoring braking performance on vintage Harley-Davidson FX and Sportster XL motorcycles. Constructed with durable neoprene components, the kit repairs failed caliper seals to eliminate fluid leaks and ensure reliable hydraulic function. It serves as an essential maintenance upgrade for classic models requiring factory-standard sealing integrity.

ENGINEERING & PERFORMANCE

The kit comprises one neoprene seal and one dust boot engineered to match original equipment specifications for optimal caliper operation. These high-quality rubber elements form a tight barrier against contaminants while maintaining correct piston movement within the caliper bore. The design restores initial brake pedal feel and consistent stopping power by reversing deterioration common in older braking systems. As a direct-fit replacement, it aligns with existing mounting interfaces and fluid pathways without modification.

KEY FEATURES

• Rear brake caliper seal kit replacement
• Includes one neoprene seal and one dust boot
• High-quality OEM-style construction
• Replaces factory OEM numbers 44180-77 and 44152-77
• Restores proper caliper sealing and braking function
• Sold complete as a service kit
• Manufactured in Taiwan

TECHNICAL SPECIFICATIONS

• Brand: Drag Specialties
• Part Name: Rear Brake Caliper Seal Kit
• Material: Neoprene
• Supported Years: 1977–1981
• Compatible Trims: FX, Sportster XL

FITMENT

• Harley FX (1977–1981)
• Harley Sportster (1977–1981)

WHY HARLEY RIDERS CHOOSE THIS

Riders choose this caliper seal kit to safely restore braking reliability on aging FX and Sportster models without replacing entire calipers. The neoprene seal and protective dust boot replicate factory sealing performance, effectively preventing fluid loss and blocking road debris from damaging internal components. This targeted repair eliminates brake fade and sponginess caused by worn seals, delivering immediate improvements in control and responsiveness. For vintage Harley enthusiasts, it offers a dependable, cost-effective way to maintain authentic riding characteristics on classic machines.