Engine & Frame Numbers by Year
| Year | Model | Notes | Engine Number | Frame Number | Notes |
|---|
| 1938 | 500cc | – | JM24 101 | JM24 101 | – |
| 1939 | 500cc | – | KM24 101 | KM24 101 | – |
| 1949 | 350cc | – | ZB32GS 101 | ZB31 101 | Rigid frames |
| 1949 | 500cc | – | ZB34GS 101 | ZB32S 101 | Spring frames |
| 1950 | 350cc | – | ZB32GS 2001 | ZB31 9001 | Rigid frames |
| 1950 | 500cc | – | ZB34GS 2001 | ZB32S 2001 | Spring frames |
| 1951 | 350cc | – | ZB32GS 3001 | ZB31 14001 | Rigid frames |
| 1951 | 500cc | – | ZB34GS 3001 | ZB32S 3001 | Spring frames |
| 1952 | 350cc | – | ZB32GS 4001 | ZB31 19001 | – |
| 1952 | 350cc | Clubmans & racing | ZB32GS 6001 | ZB31 19001 | Rigid frames |
| 1952 | 500cc | Sand castings | ZB34GS 4001 | ZB32S 4001 | Sprint frames |
| 1952 | 500cc | Die castings | ZB34GS 5001 | ZB32S 4001 | – |
| 1953 | 350cc | – | BB32GS 101 | BB31 101 | Rigid frames |
| 1953 | 500cc | – | BB34GS 101 | BB32S 101 | Spring frames |
| 1954 | 350cc | – | BB32GS1001 | CB32 101 | – |
| 1954 | 500cc | – | BB34GS 1001 | CB32 101 | – |
| 1954 | 350cc | – | CB32GS 101 | CB32 101 | – |
| 1954 | 500cc | – | CB34GS 1001 | CB32D 101 | – |
| 1954 | 500cc | Daytona Model | BB34GSD 101 | CB32D 101 | – |
| 1955 | 350cc | – | BB32GS 2001 | CB32 1501 | – |
| 1955 | 350cc | – | CB32GS 501 | CB32 1501 | – |
| 1955 | 500cc | – | BB34GS 2001 | CB32 1501 | – |
| 1955 | 500cc | – | CB34GS 501 | CB32 1501 | – |
| 1955 | 350cc | – | DB32GS 101 | CB32 1501 | – |
| 1955 | 500cc | – | DB34GS 501 | CB32 1501 | – |
| 1956 | 350cc | – | DB32GS 501 | CB32 4001 | – |
| 1956 | 500cc | – | DB34GS 501 | CB32 4001 | – |
| 1956 | 500cc | Revised Cyl. Head | DBD34GS 2001 | BB32R 301 | – |
| 1956 | 500cc | USA Short Circuit | DB34GS 501 | BB32R 301 | – |
| 1957 | 350cc | – | DB32GS 501 | CB32 4001 | – |
| 1957 | 500cc | – | DB34GS 501 | CB32 4001 | – |
| 1957 | 500cc | Revised Cyl. Head | DBD34GS 2001 | BB32 301 | – |
| 1957 | 500cc | USA Short Circuit | DB34GS 501 | BB32 301 | – |
| 1958 | 350cc | – | DB32GS | CB32 7001 | – |
| 1958 | 500cc | – | DBD34GS 3001 | CB32 7001 | – |
| 1959 | 350cc | – | DB32GS 1501 | CB32 7873 | – |
| 1959 | 500cc | – | DBD34GS 3753 | CB32 7873 | – |
| 1959 | 500cc | Catalina Scrambler | DBD34GS 3753 | CB32C 101 | – |
| 1960 | 350cc | – | DB32GS 1601 | CB32 8701 | – |
| 1960 | 500cc | – | DBD34GS 4601 | CB32 8701 | – |
| 1960 | 500cc | Catalina Scrambler | DBD34GS 4601 | CB32C 351 | – |
| 1961 | 350cc | – | DB32GS 1741 | CB32 10101 | – |
| 1961 | 500cc | – | DBD34GS 5684 | CB32 10101 | – |
| 1961 | 500cc | Catalina Scrambler | DBD34GS 5684 | CB32C 601 | – |
| 1962 | 350cc | – | DB32GS 1794 | CB32 11001 | – |
| 1962 | 500cc | – | DBD34GS 6504 | CB32 11001 | – |
| 1962 | 500cc | Catalina Scrambler | DBD34GS 6504 | CB32C 741 | – |
| 1963 | 500cc | – | DBD34GS 6881 | CB32 11451 | – |
| 1963 | 500cc | Catalina Scrambler | DBD34GS 6881 | CB32C 857 | – |
