Dual‑Disc Front Brake Caliper Seal Kit – Fits Harley FX & XL Sportster (1977‑1983) – Replaces OEM 44153‑77 / 44151‑77

OVERVIEW

This caliper seal kit provides a precise replacement to restore factory braking performance on vintage Harley‑Davidson models equipped with dual front disc brakes from 1977 through 1983. Crafted with durable neoprene rubber, it ensures reliable caliper function and consistent stopping power. Designed specifically for the FX and XL Sportster lineup, this rebuild kit delivers an exact match to original equipment specifications.

ENGINEERING & PERFORMANCE

The kit utilizes reinforced neoprene elastomers engineered to withstand repeated calibration expansion cycles and maintain consistent hydraulic pressure. Accompanying dust boots shield internal piston surfaces from moisture, road grit, and corrosion, extending caliper service intervals. As a direct replacement for OEM part numbers 44153‑77 and 44151‑77, every component aligns with original dimensions to preserve smooth lever action and predictable modulation.

KEY FEATURES

• Includes two neoprene caliper seals and two protective dust boots for one front caliper
• Direct replacement for OEM part numbers 44153‑77 and 44151‑77
• Engineered to match exact OEM dimensions and pedal feel
• Resists fluid degradation and maintains consistent hydraulic sealing
• Compatible exclusively with dual‑disc front brake systems
• Provides complete rebuilding components for standard maintenance cycles

TECHNICAL SPECIFICATIONS

• Part name: Dual‑Disc Front Brake Caliper Seal Kit
• Component type: Hydraulic seal assembly
• Construction material: Neoprene rubber seals with reinforced dust boots
• Supported years: 1977–1983
• Compatible Harley trims: FX and XL Sportster (Dual‑Disc Front Brakes)

FITMENT

• Harley Sportster (1977–1983)
• Harley FX Series (1977–1983)

WHY HARLEY RIDERS CHOOSE THIS

Vintage dual‑disc brake systems rely on pristine internal seals to prevent moisture intrusion and maintain smooth lever response. Riders select this kit because the neoprene formulation resists swelling and wear, while the included dust boots create a lasting barrier against road contamination. By delivering an exact OEM dimensional match, the components eliminate spongy pedal feel and restore crisp, predictable modulation. It stands as a straightforward, cost‑effective rebuild solution that keeps classic FX and XL models stopping reliably for daily riding and weekend cruises alike.