05-14-2023, 09:08 AM
2 things I can think of.
1. Outright issue at the front master cylinder as mentioned above. (If not seeing any leaks at either front calipers or lines.
OR
2. You had air in the lines and also happened to have a new tech/apprentice at the shop that didn't bleed your brakes properly and you still have air or the addition of air in the system.
I would absolutely start with flushing your brakes yourself to purge any air and know for sure that it is done and done properly. You can even get a vacuum hand pump from harbor freight for a few dollars that makes it an already easier and faster process. You'll be done in about 5 minutes.
https://www.harborfreight.com/brake-blee...63391.html
There are other pumps on amazon also for $20 or less. You also don't need a pump you can just do it the old school way by building pressure with the lever, holding the lever, and opening then closing the bleeder, then releasing the lever and repeating. Just make sure you keep the master cylinder topped off.
https://youtu.be/fUWO0SQX6-U
After you flush the system to make sure for certain there is no air in the system AND that you actually have new brake fluid. If the problem still persists than you can go deeper into rebuilding the calipers or master cylinder after further investigation.
2014 CB1100, 1981 KZ440 LTD, 1993 Yamaha XJ600 Seca, 1994 Yamaha XJ600 Seca
1. Outright issue at the front master cylinder as mentioned above. (If not seeing any leaks at either front calipers or lines.
OR
2. You had air in the lines and also happened to have a new tech/apprentice at the shop that didn't bleed your brakes properly and you still have air or the addition of air in the system.
I would absolutely start with flushing your brakes yourself to purge any air and know for sure that it is done and done properly. You can even get a vacuum hand pump from harbor freight for a few dollars that makes it an already easier and faster process. You'll be done in about 5 minutes.
https://www.harborfreight.com/brake-blee...63391.html
There are other pumps on amazon also for $20 or less. You also don't need a pump you can just do it the old school way by building pressure with the lever, holding the lever, and opening then closing the bleeder, then releasing the lever and repeating. Just make sure you keep the master cylinder topped off.
https://youtu.be/fUWO0SQX6-U
After you flush the system to make sure for certain there is no air in the system AND that you actually have new brake fluid. If the problem still persists than you can go deeper into rebuilding the calipers or master cylinder after further investigation.
2014 CB1100, 1981 KZ440 LTD, 1993 Yamaha XJ600 Seca, 1994 Yamaha XJ600 Seca