Brake Master Cylinder - 14mm for Rear Brakes on R100 Models The cylinder was originally a 15mm bore however BMW retrospectively superceeded this with the 14mm.cylinder. The rider will hardly notice the difference - the brake lever has slightly more travel and the brakes are slightly more powerful.
No longer available from BMW
NOTE: See BMCylinder960 for the master cylinder post 09/80 and BMCylinder233 for Master Cylinder Rebuild Kit.
Vehicle Manufacturer: BMW
Application: BMW Airhead Models
Make/Model: BMW R100RS, R100RT, R100S
Model Years: 1976 - 09/1980
Manufacturer #: 34 31 1 238 084
(See APPLICATION TABLE tab BELOW to verify vehicle fitment) Part # BMCylinder084
No longer available from BMW
NOTE: See BMCylinder960 for the master cylinder post 09/80 and BMCylinder233 for Master Cylinder Rebuild Kit.
Vehicle Manufacturer: BMW
Application: BMW Airhead Models
Make/Model: BMW R100RS, R100RT, R100S
Model Years: 1976 - 09/1980
Manufacturer #: 34 31 1 238 084
(See APPLICATION TABLE tab BELOW to verify vehicle fitment) Part # BMCylinder084
 |  |  |
| EME Part Number: | BMCylinder084 |
| BMW Part Number: | 34 31 1 238 084 |
| Model | Year |
| R100RS (2474) | 03/76-09/80 ECE |
| R100RS 77-84 (2474) | 05/76-09/80 USA |
| R100RT (2474) | 06/78-09/80 ECE |
| R100RT 79-84 (2474) | 04/78-09/80 USA |
| R100S (2474) | 05/76-07/80 ECE |
| R100S (2474) | 05/76-07/80 USA |