I have had the brake master cylinder of the bike for a while and have been putting off working on it since it is not a stock component. From what I can tell it came off at mid 80's Yamaha, but isolating it enough to figure out which rebuild kit was difficult. Even the dealer couldn't give me a decent idea. Well I decided to tear it apart and inspect the seals and see if by some chance it didn't need to be rebuilt.
Here was the state it was in:
There was a lot of corrosion on the outside from the brake fluid sitting in the system, but I was happy to find out when I opened it up, that the bore was clean and the seal were still pliable and looked good! Well this saved a lot of time and frustration. So i soda blasted the body, and wire wheeled the rubber coating from the handle and repainted the whole thing, below is the result.
Next up is removing the rest of the front brake system and cleaning up those.
Here was the state it was in:
There was a lot of corrosion on the outside from the brake fluid sitting in the system, but I was happy to find out when I opened it up, that the bore was clean and the seal were still pliable and looked good! Well this saved a lot of time and frustration. So i soda blasted the body, and wire wheeled the rubber coating from the handle and repainted the whole thing, below is the result.
Next up is removing the rest of the front brake system and cleaning up those.
