Prima SI Main Jet Kit 10pcs Fits Vespa Vintage Genuine Stella 2T Scooter. The kit includes 10 main jets, each with a specific size, providing a wide range of options to fine-tune the carburetor's fuel delivery. These jets are precision-engineered to adjust the amount of fuel mixed with air, enabling riders to achieve the perfect air-fuel ratio for their riding conditions and preferences. By fine-tuning the carburetor with the main jet kit, riders can optimize engine performance across various riding conditions. Whether seeking improved acceleration, higher top speed, or better fuel efficiency, adjusting the main jet allows for precise tuning of the air-fuel mixture, enhancing overall engine performance.

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