How do I measure brake line length accurately?
Measure from fitting to fitting along the exact routing path the brake line will take. Include any bends, curves, and clearances needed for suspension movement and steering lock. See also our Motorcycle Insurance Cost Calculator.
What's the difference between flexible hose and rigid brake lines?
Flexible brake hose allows for movement and vibration, while rigid brake lines are solid metal tubes used for fixed sections. Most motorcycles use a combination of both.
How many copper washers do I need for banjo fittings?
Typically you need 2 copper washers per banjo bolt - one on each side of the banjo fitting. Always use new washers when installing brake lines for proper sealing.
When should I replace motorcycle brake lines?
Replace brake lines if you notice bulging, cracking, or deterioration in the rubber, fluid leaks, or if they're over 4-6 years old. Also replace when modifying your bike's geometry.
What tools do I need to measure brake lines?
You'll need a flexible measuring tape or string, calipers for fitting measurements, and ideally a brake line measuring kit. Always measure twice and add a small safety margin.
Can I make brake lines longer than needed?
While you can make lines slightly longer, excess length should be minimal to avoid routing issues, kinking, or interference with moving parts. Proper length ensures optimal performance and safety.
What's the maximum length for a single brake line?
While there's no strict maximum, brake lines over 2000mm may require additional support brackets and careful routing. Longer lines can also affect brake feel and response.
Do I need different fittings for front and rear brake lines?
Yes, front and rear brake systems often use different fitting sizes and styles. Check your motorcycle's specifications or existing brake lines to determine the correct fittings needed. You might also find our Recommended Windscreen Height — Motorcycle Wind Screen Height useful.