AS3 Performance Braided Brake Lines

The AS3 Performance Braided Stainless Steel Brake Line Kit is a safety-critical hydraulic braking upgrade engineered to eliminate the spongy, vague brake lever feel caused by standard factory rubber brake hoses. Stock rubber brake lines expand elastically under hydraulic pressure, especially when brake fluid heats up during aggressive riding. This volumetric expansion wastes valuable hydraulic master cylinder pressure, resulting in excessive lever travel, reduced braking power, and inconsistent bite points into turns.

AS3 Performance brake lines eliminate line swell by utilizing an ultra-low friction PTFE (Teflon) internal core wrapped in a tight, high-density braid of 303/304 marine-grade stainless steel. This braided armor prevents any radial line expansion under extreme hydraulic pressures exceeding 4,000 PSI, delivering immediate 1:1 hydraulic force transfer from the master cylinder to the brake caliper pistons. The exterior is coated in a durable, UV-resistant PVC protective sleeve that prevents the stainless braid from scratching fork legs or chassis parts. The fittings are precision-swaged chrome-plated or stainless steel banjo ends designed with exact OEM routing angles.

Technical Specifications & Engineering Specs

• Internal Core: Smooth-bore PTFE (Polytetrafluoroethylene) Teflon hose
• Braided Armor: High-density 303/304 marine-grade stainless steel wire weave
• Outer Jacket: UV-stabilized clear or colored PVC protective coating
• Fittings: Precision-swaged stainless steel / chrome-plated banjo unions
• Pressure Rating: Tested to 4,000+ PSI burst pressure (far exceeding motorcycle brake pressures)

Step-by-Step Installation & Safety Protocols

Installation involves draining the existing brake fluid from the system. Unbolt the upper and lower banjo bolts holding the stock rubber line, catching residual fluid in a rag. Route the AS3 Performance braided line through the factory fork guard routing guides. Install the line using new copper crush washers on both sides of each banjo fitting (always use two new copper washers per banjo bolt). Torque banjo bolts to 18-20 Nm. Fill the master cylinder with fresh DOT 4 or DOT 5.1 brake fluid (never use DOT 5 silicone fluid). Bleed the brake system thoroughly using a vacuum bleeder or manual pump-and-hold method until all air bubbles are purged and the lever is rock-solid. Check for fluid leaks around all fittings before riding.

Maintenance & Brake Fluid Flushing

Maintenance involves inspecting the protective outer jacket for wear and flushing brake fluid annually.

Frequently Asked Questions