Jet, Main #37 SHA/SHB for Scooters & Mopeds
ITEM# TT-26220
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Description
Main Jet #37 for Vespa Small Frame Scooters and Mopeds
This main jet suits small frame Vespa scooters and mopeds that use 16mm and 19mm carburetors, including PHBG models. It plays a key role in the fuel delivery system and directly affects how the engine runs and how efficiently it uses fuel. You can find it among our carburetor and jet options for dialing in the right fuel-air balance. Swapping it out can help your scooter perform better overall.
Details and Functionality
The main jet controls how much fuel reaches the engine through the carburetor. Small frame Vespas generally rely on two jets: a main jet and an idle jet. This model is available in sizes from 37 to 88. Getting the jetting right often takes some experimenting, so checking jetting guides is a good idea for the best outcome.
Installation and Compatibility
This main jet is made to drop into existing carburetor setups. Before fitting it, confirm it matches your particular engine setup. It's a simple component, and many riders change it when tuning or servicing their scooters to improve performance.
Specifications
- Size: 37
- Position: Main jet
- Fits: Vespa small frame scooters with 16mm and 19mm carbs, and PHBG carbs
Fitment
Compatible with:
- Vespa small frame (16mm carb)
- Vespa small frame (19mm carb)
- PHBG carb
How to choose: Make sure the jet size matches the main jet position on your carburetor. This #37 is the smallest option in the 37-88 range.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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