Brake Master Cylinder Kit for Dual Disc Models - includes 17mm Piston, all Seals, and Circlips for rebuild.
| BMW Part Number: | 34 31 1 234 927 |
| Model | Year |
| R80 (2477) | 04/77-11/84 ECE |
| R80 (2477) | 04/77-07/80 USA |
| R80TIC (2477) | 06/78-01/85 ECE |
| R90S (2476) | 09/75-06/76 ECE |
| R90S (2476) | 09/75-06/76 USA |
| R100/7 (2474) | 05/76-06/77 ECE |
| R100/7T (2474) | 04/77-10/84 ECE |
| R100/7T (2474) | 05/76-07/78 USA |
| R100/T (2474) | 09/78-09/84 USA |
| R100RS (2474) | 03/76-11/84 ECE |
| R100RS 77-84 (2474) | 05/76-10/84 USA |
| R100RT (2474) | 06/78-10/84 ECE |
| R100RT 79-84 (2474) | 04/78-09/84 USA |
| R100S (2474) | 05/76-07/80 ECE |
| R100S (2474) | 05/76-07/80 USA |