| Model | Years | Displ. | Power Output |
| R50/5 | 70-73 | 496cc | 32 HP @ 6400 RPM |
| R60/5 | 70-73 | 599cc | 40 HP @ 6400 RPM |
| R75/5 | 70-73 | 745cc | 50 HP @ 6200 RPM |
| R60/6 | 74-76 | 599cc | 40 HP @ 6400 RPM |
| R75/6 | 74-76 | 745cc | 50 HP @ 6200 RPM |
| R90/6 | 74-76 | 900cc | 60 HP @ 6500 RPM |
| R90S | 74-76 | 900cc | 67 HP @ 7000 RPM |
| R60/7 | 77-80 | 599cc | 40 HP @ 6400 RPM |
| R75/7 | 77 | 745cc | 50 HP @ 6200 RPM |
| R80/7 | 78-84 | 797cc | 55 HP @ 7250 RPM |
| R100/7 | 77-79 | 980cc | 60 HP @ 6500 RPM |
| R100S | 77-78 | 980cc | 65 HP @ 6600 RPM |
| R100RS | 77-84 | 980cc | 70 HP @ 7250 RPM |
| R100RT | 78-84 | 980cc | 70 HP @ 7250 RPM |
| R100T | 79-84 | 980cc | 65 HP @ 7250 RPM |
| R100CS | 81-84 | 980cc | 70 HP @ 7000 RPM |
| R45 | 79-84 | 473cc | 27 HP @ 6500 RPM |
| R65 | 79-84 | 649cc | 45 HP @ 7250 RPM |
