Question My 80 cbX front brakes are sticking and I believe the master cylinder (mc)is plugged. Ive taken the cap off and it looks a lot different than other Honda mc Ive seen. What is the correct way to unplug a cbX mc or rebuild it?
Thanks so much, Terry
Answer The master cylinder rebuild was covered in a CBXpress a few years ago. You can also go to the www.cbxclub.com website to see some pictures and get help. rebuild kits are around $50 on ebay. There is a very small orifice that allows the fluid to move from the lines into the reservoir, if that is plugged, then the brakes will apply harder and harder as the temperature goes up. The brake fluid should be changed annually. The white (yellow) plastic part can be lifted off the aluminum container but have a replacement ready in case it is damaged or cracked. If you just want to unblock the small orifice, rotate the white plastic 90 degrees and you should be able to see the hole through the holes in the plastic in the bottom. Replace the 'O' ring since it will have dents in it from corrosion product and will likely not seal properly again. Brake fluid does a nasty number on paint, ensure the parts are sealed and tight before going for a ride.
Good luck, Jan
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Thank you for your fast reply. Very helpful. Terry.
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Have owned over 50 of these fine classic Honda motorcycles
Organizations International CBX Owners Association, SAE, Materials Research Society
Publications CBXPress, VLMC magazine, Used Bike Guide
Education/Credentials PhD in Materials Science, Post-Doc in prototyping automotive components