MD-661 rotor fits the following BMW models:
REAR
| R 100 GS | 86-94 |
| R 100 GS | 89-90 |
| R 100 PD | 89-96 |
| R 80/R 80 RT (Single rotor) | 08/90-95 |
| R 850 GS | 96 |
| R 100/7T (Spoke wheel) | 09/80-84 |
| R 45/45 N (Twin rotor with ATE caliper) | 8-09/80 |
| R 45/45 N (Twin rotor with ATE caliper) | 10/80-85 |
| R 45/45 N (Twin rotor with Brembo caliper) | 78-90/80 |
| R 45/45 N (Twin rotor with Brembo calipers) | 10/80-85 |
| R 65 LS | 81-85 |
| R 65 LS (Brembo caliper) | 81-85 |
| R 65 GS | 87-92 |
| R 80 GS | 87-95 |
| R 80 GS | 80-87 |
| R 80 PD/CH | 90-95 |
| R 80 ST | 82-84 |
| K 100 RS (16 valve - Non ABS) | 89-92 |
| K 1100 LT (Non ABS) | 89-07/93 |
| K 1100 LT (Non ABS) | 08/93-99 |
| K 1100 RS (Non ABS Model) | 92-96 |
| K1 (16 valve - Non ABS) | 88-93 |
| R 1100 R (Cast wheel) | 93-01 |
