42455-80 Rear Brake Master Cylinder Cap & Dust Seals

This rear brake master cylinder cap and dust seal kit is a direct replacement for the original equipment, cross-referencing to OEM 42455-80. It is designed to fit a wide range of Harley-Davidson models, including Big Twin, FX, FXR, Softail, Sportster, and Touring bikes. The top cover gaskets and seals are manufactured to high standards and are compatible with DOT 3, DOT 4, or DOT 5 brake fluids. However, as any mechanic will tell you, it is crucial to stick with the same fluid type already in your system, as these types are chemically incompatible and mixing them can lead to brake failure. Keeping your master cylinder sealed properly is essential for maintaining consistent hydraulic pressure and preventing moisture contamination in your braking system.