- Located on the side of the carburetor, the air cut-off valve prevents lean fuel mixture (backfire) when decelerating
- Temporarily closes the pilot jet airway to provide a richer mix as the throttle closes
- Direct OEM-style replacement carburetor air cut-off valve set
- Include diaphragm, spring and O-ring
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1978 | Honda | CB400 Hondamatic | |
| 1979 | Honda | CM400A Hondamatic | |
| 1979 | Honda | CM400T | |
| 1978-1979 | Honda | CX500 | |
| 1979 | Honda | CX500C Custom | |
| 1979 | Honda | CX500D Deluxe | |
| 1978-1979 | Honda | Hawk I 400 CB400T | |
| 1978-1979 | Honda | Hawk II 400 CB400T | |
| 1978-1979 | Honda | XL250S | |