Yamaha’s YBS-61 baritone sax was an excellent instrument, but the original octave vent design caused some pitches in the second octave to be stuffy. Yamaha eventually redesigned the octave vents, and we can update your original YBS-61 to match the improved specification.
Have you ever put a sax mouthpiece on your neck and cracked the shank end (the part that goes over the cork)? How do we fix this? First, the crack is sealed so there are no leaks.