NORTON COMMANDO CYLINDER HEADS
| NORTON COMMANDO CYLINDER HEADS |
Identification
Number |
Part
Number |
Capacity |
Compression
Ratio |
Inlet Port |
Remarks |
| |
|
|
|
|
|
| RH1 |
060988 |
750cc |
9.0 : 1 |
30mm |
Standard up to 1972 |
| RH2 |
061427 |
750cc |
10.25 : 1 |
32mm |
AMA racer |
| RH3 |
063327 |
750cc |
10 : 1 |
32mm |
1972 Combat |
| RH4 |
064038 |
850cc |
8.5 : 1 |
32mm |
1973 |
| RH5 |
064048 |
750cc |
8.9 : 1 |
32mm |
1973 low compression |
| RH6 |
064097 |
750cc |
9.3 : 1 |
32mm |
1973 |
| RH7 |
064845 |
750cc |
10 : 1 |
32mm |
1973 short stroke |
| RH8 |
064884 |
750cc |
- |
32mm |
1973 short stroke race kit |
| RH9 |
065013 |
850cc |
10:5 : 1 |
32mm |
1974 high performance |
| RH10 |
065062 |
850cc |
8.5 : 1 |
30mm |
1974 |
| |
|
|
|
|
|
| A suffix S, e.g. RH6S, indicates a 750cc head fitted with 850cc guides |
