Main Jet #80 for SHA/SHB Carbs for Scooters & Mopeds
ITEM# TT-25805
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Description
Main Jet #80 for Small Frame Vespa Scooters and Mopeds
This main jet is made for small frame Vespa scooters running 16mm and 19mm carburetors, as well as PHBG carburetors. It controls how much fuel is mixed with air going into the engine. Changing the fuel-air balance with this jet can affect performance and efficiency. It belongs to the range of scooter carburetors and jets, and dialing it in may take some experimenting, so refer to jetting guides when you need direction.
How Main Jets Work
Within a scooter's carburetor, the main jet works together with the idle jet to meter fuel. For small frame Vespas, these jets come in sizes from 37 to 88, so you can select a size that suits the performance you want.
Signs It May Be Time to Change the Main Jet
A main jet swap is commonly done when fine-tuning the engine for a better throttle response, or while servicing the carburetor. Poor acceleration or unsteady idle can suggest the jetting should be checked and corrected.
Specifications
- Size: #80
- Position: Main Jet
- Fits: Small Frame Vespa scooters with 16mm and 19mm SHA/SHB carbs, and PHBG carbs
Compatibility
Compatible with:
- Vespa Small Frame (16mm and 19mm SHA/SHB carbs)
- PHBG carbs
How to choose: This part is identified by its number. Only buy it if your carburetor uses a #80 main jet; the current jet number is stamped on the jet itself.
Shop more: Scooter Carburetors and Jets · Scooter Parts
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