YFI
| Acronym | Definition |
|---|---|
| YFI | Yamaha Fuel Injection |
| YFI | Yamaha Fuel Injection (vehicle engine) |
| YFI | Yale Friends of Israel |
| YFI | Young Families Initiative (Iowa) |
| YFI | Yellow Fever Immunization |
| YFI | You Fail It |
| YFI | Yoga Federation of Ireland (Dublin, Ireland) |