This Tutti Ricambi #118 main jet helps you dial in the fueling on your classic Vespa or Genuine Stella 150 2T so you can get back to enjoying the ride. Designed for Dell'Orto and Spaco SI carburetors, this small brass jet sits at the bottom of the main jet stack and meters its fuel supply. It's a convenient individual replacement when your tuning calls for a #118, without buying a complete jet assortment.
SI identifies the Dell'Orto/Spaco carburetor family used on vintage large-frame Vespa, Vespa P/PX and Genuine Stella 150 two-stroke applications. Carburetors in this family include SI 20/15, 20/17, 20/20 and 24/24 configurations. Match your carburetor's SI main-jet design before ordering; #118 is a tuning size, not a stock-jet recommendation for every model below.
| Make / model family |
Applications with a compatible SI carburetor |
| Vespa 125 |
VNB, VNC Super 125, VNL GT/GTR, VNX P/PX 125 |
| Vespa 150 |
VBA, VBB, VBC Super 150, VLA GL150, VLB Sprint, VLX P/PX 150 |
| Vespa 160/180 |
VSB GS 160, VSC SS 180, VSD Rally 180, when equipped with a compatible SI setup |
| Vespa 200 |
VSE Rally 200, VSX P/PX 200 E |
| Genuine |
Stella 150 2T with a compatible SI carburetor |
Jetting Guidance
A larger main-jet number allows more fuel flow within this jet family. The correct size depends on your cylinder, exhaust, intake and operating conditions; vehicle model alone does not determine the jet you need. Your complete jet stack also matters, so tune the combination rather than choosing #118 simply because it fits.