| Year | Model | Casting # | Type | Float | Main | Slow | JN | Screw | Notes |
| 69-71 | CB750K0-K1 | B750A & 7A | 1 | 26 | 120 | 40 | 3 | 1 | E25 |
| 1972 | CB750K2 | 657A | 1 | 26 | 110 | 40 | 4 | 1 | |
| 1973 | CB750K3 | 657B & 086A | 1 | 26 | 105 | 40 | 4 | 1 | |
| 1973-76 | CB750K4-K6 | 657B | 1 | 26 | 100 | 40 | 4 | 1 | 1-1.5 turns on the screw |
| Year | Model | Casting # | Type | Float | Main | Slow | JN | Screw | Notes |
| 69-71 | CB750K0-K1 | B750A & 7A | 1 | 26 | 120 | 40 | 3 | 1 | E25 |
| 1972 | CB750K2 | 657A | 1 | 26 | 110 | 40 | 4 | 1 | |
| 1973 | CB750K3 | 657B & 086A | 1 | 26 | 105 | 40 | 4 | 1 | |
| 1973-76 | CB750K4-K6 | 657B | 1 | 26 | 100 | 40 | 4 | 1 | 1-1.5 turns on the screw |