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Description
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Bike Fitment
Description
Rear Master Rebuild Kit, 1978-1980
Genuine Brembo Rebuild Kit
Repair kit for the brake master cylinder, 15.87mm, R100S, R100RS,
& R100RT. This is an OEM equivalent when rebuilding your vintage
Airheads rear brake, bringing it back to life, improving function, and
increasing safety, by having a fully functional rear brake master
cylinder.
BMW Part # 34 31 1 237 233
34 31 1 237 233
34311237233
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Dave (Amity Ar) | May 18th, 2026
Real original parts, not cheap knock off.
Frank Shuck (Steilacoom Wa.) | March 17th, 2026
Kudos to boxer2valve! With help on the YouTube video on master cylinder rebuild I was able to save a few bucks rather than buying a new master cylinder. Works perfectly now and will definitely order more parts as needed with appreciation, Frank Shuck
Essential Tools
Bike Fitment
R100 RS
1978
· 1979
· 1980
R100 RT
1978
· 1979
· 1980
R100 S
1978
· 1979
· 1980