Choosing a master cylinder Help



Hi all! Not sure where to post this so please move as needed.

Went down at BHF last week and thought all was fine with my bike, just needed new brake pads. Installed them today with new motul 660 brake fluid. While bedding them my front brakes started seizing and the only way to relieve pressure was to release at the caliper.

Disassembled calipers and cleaned, they were in great shape, seals are good and no issues. Went to look at the master cylinder and noticed some abnormal wear/marks...

Choosing a master cylinder Help