| Fuel Pump | AC WE (Double-acting) Combined fuel pump and vacuum booster pump |
|---|---|
| Fuel pump pressure | 1.5 to 3 psi. (10 to 20kPa) |
| Carburettor | Zenith 42 VIR-3 |
| Zenith 48 VIR-3 from engine No. RL.36321 onwards. | |
| Air Cleaner | AC 7222221 or FV.157522 |
| Make & Type | Zenith 48 VIR |
|---|---|
| Venturi Diameter | 36mm. (No bars) |
| Main Jet | 145 |
| Compensating Jet | 130 |
| Slow-Running Jet | 70 |
| Pump Jet | 80 |
| Needle Valve | 2.5mm |
| Needle Valve Washer Thickness | 1.6mm (one of) |