Rear master cylinder

[Guest]

Bought a 78 Gs 750 as a project. Rear master cylinder is shot and not able to be rebuilt. Does anyone know of an affordable aftermarket one that will bolt up to the stock mounting points? Was never a fan of rebuilding brake components and don't want to break the bank on new OEM.

[tom203]

Ebaying used master cylinders is risky (I got two junk ones). Parts outlaw still shows rear master cylinder still available for about $175. Or post in parts wanted forum on here-someone might have one.

[eil]

Was never a fan of rebuilding brake components

Huh, why? Rebuilding is super simple as long as the bore on the existing MC is good and you've got good new OEM seals and parts.

If you don't want to buy new OEM, you are left with buying a use one, which you will have to rebuild anyway unless you want to trust your life to 35 year old seals.

Them's your choices.

That said, rear master cylinder design did not vary much throughout the 80s and 90s and I would be surprised if a wide variety of rear MCs couldn't be fitted to a GS with the help of an adapter plate and modified linkage. But that sounds like rather more work than what you're after.