Motorcycle Brake Lines Stock brake lines for hydraulic motorcycle brakes are usually made of rubber. Over time, the rubber ages and stretches due to the constant pressure. As a result, you lose some braking force between lever and brake calliper, and braking becomes less effective and less controllable. New brake lines can make a world of difference. Especially if you install steel-braided brake lines. The sheath of braided steel ensures high braking performance, a crisp pressure point and, moreover, the lines have a much longer useful life. At Louis you will find ready assembled brake line kits with type approval for many motorcycles, including older models.