Always use the correct line for the position, Brake Fluid, and pressure within the hydraulic system
A hydraulic brake system uses different types of lines. The high-pressure brake line carries the pressure from the brake master cylinder to the brake caliper. In systems with an external Brake Fluid reservoir, a short flexible fluid hose is also used between the reservoir and the brake master cylinder.
In this collection, you will find brake lines and fluid hoses for maintenance, replacement, and custom installation. Carefully check which type of line it is. A soft reservoir hose is intended exclusively for fluid supply on the low-pressure side and must never be used as a replacement for a high-pressure brake line.
The material must also be resistant to the specified brake or clutch fluid. A regular gasoline, vacuum, or water hose is not suitable for this purpose.
The hose between an external fluid reservoir and the brake master cylinder is normally not under the same high hydraulic pressure as the line between the brake master cylinder and the brake caliper. Therefore, the construction and fittings differ.
A high-pressure brake line uses crimped or fixed fittings and must be suitable for the high pressure generated during braking. Use both types of lines only in the position for which they are designed.
The line must be long enough to allow free steering, suspension, and wheel movement but not so long that large loops form. For the front brake, check the routing at full steering lock and full suspension compression and extension.
Avoid sharp bends, kinks, hot exhaust parts, and rubbing contacts with the frame or fairing. Use the original guides and clamps or technically suitable replacements.
Check whether the line, hose, and seals are suitable for the fluid used. DOT Brake Fluid and mineral hydraulic fluid require different material compatibility and must not be mixed.
Use only the fluid prescribed by the engine and component manufacturer. The wrong fluid can damage hoses and seals.
Check all fittings for damage and use new sealing rings where prescribed. After working on a pressure-carrying brake line, the system must be completely filled and bled.
Test the pressure point and carefully check for leaks before riding. Installation or manufacturing of high-pressure brake lines is safety-critical and should be performed by a brake specialist if in doubt.
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