Brake master cylinder 13mm For BMW 2-valve models

Brake master cylinder Main brake cylinder.
Cylinder with tank piston.
Square housing.

For BMW boxer 2-valve models:
BMW R 45 and R 65 only from 9/1980 up to 9/1981 single front brake disc
BMW R 80G/S up to 9/1981
BMW R 65 and R 80 Monolever with dual front brake disc
BMW R 80GS and R 100GS from 1988 up to 1990
BMW R 100RS and R 100RT Monolever with dual front brake disc up to 4/1989.

Compare: 32722310784 / 32-72-2-310-784