As part of a 24,000 mile maintenance check up on a Hinckley Bonneville, it is recommended to check and potentially replace brake lines and brake fluid. I decided to replace mine due to my year round riding and the salty grime that is produced on Chicago area roads in the winter.

I ordered replacement Spiegler stainless steel brake lines from New Bonneville.

Here’s what the front and back lines look like out of the packaging.

I followed the instructions in the Haynes service manual for replacing brake lines, then bleeding the system of air. The brake line replacement is the easy part. You simply disconnect each end of the line, and replace with the new lines, using the new crush washers per the instructions provided in the Spiegler packaging.

The harder part is bleeding the brake system of air. You have to make sure there is proper brake fluid levels maintained in the reservoirs as you bleed to system. You also need to compress the brake pistons to force as much air out as possible. It can become a bit messy doing it by yourself! In the end, it is possible to achieve, and I learned how to do this process faster and better the next time!

Here’s a couple views of the finished installation.

So far, no leaks and everything seems to be working just fine!