The three ring set is for one piston only (normally need two sets) and are applied as:
- First Oversize Piston Rings for750cc engines ( /5, /6, & /7's)
- Second Oversize Piston Rings for 650cc engines pre 1981
NOTE: Top of your pistons are stamped 82.46, 82.47, or 82.48 and the diameter is 82mm + 0.5mm
Vehicle Manufacturer: BMW
Application: BMW Airhead Models
Make/Model: BMW R65, R75/5, R75/6, R75/7
Model Years: 1969 - 1985
Manufacturer #: 11 25 1 256 478, 08-700407-00
(See APPLICATION TABLE tab BELOW to verify vehicle fitment)
 |  |  |
| EME Part Number: | PistonRing478 |
| BMW Part Number: | 11 25 1 256 478 |
| Model | Year |
| R65 (248) | 01/78-07/85 ECE |
| R65 (248) | 07/78-04/85 USA |
| R75/5 (2476) | 08/69-07/80 ECE |
| R75/6 (2476) | 09/73-06/76 ECE |
| R75/6 (2476) | 01/74-06/76 USA |
| R75/7 (2477) | 05/76-01/79 ECE |
| R75/7 (2477) | 07/76-06/77 USA |