| Make | Model | Factor | Nom Bob
Weight gms |
Nom Piston
Weight gms |
Nom Big End
Weight gms |
Nom Little End
Weight gms |
| BSA | Gold Flash | 55% | ||||
| BSA | Super Rocket | 62% | ||||
| Matchless | 500 | 50% | ||||
| Matchless | 600 | 60-70% | ||||
| Norton Rubber mount | 850 | 50% Oil
63% Dry |
||||
| Norton Feather Bed | 850 | 70% Oil
85% Dry |
||||
| Norton | 750 Race | 84% | ||||
| Triumph | 650-750 | 55% | ||||
| Triumph | 650-750 Race | 85% |
