• Main Jet #107, SI Carbs
Main Jet # 107 For Si Carbs

This is the small, cone-shaped jet at the bottom of the main jet stack. They come in various sizes ranging 82-165. Most vintage Vespas will use one in the 85-116 range, though performance-modded engines can drink a lot more gas and use much bigger jets. The larger the number, the more fuel will flow through.

Main Jet #107, SI Carbs

Scooter Dellorto SI Jets

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