Main Jet #53 for SHA/SHB Carbs for Scooters & Mopeds
ITEM# TT-26106
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Description
Main Jet #53 for Vespa Small Frame Scooters and Mopeds
The #53 Main Jet is built for small frame Vespa models that use 16mm and 19mm carburetors, including PHBG versions. It controls how much fuel reaches the engine, which makes it a key part for consistent running. It belongs to the group of scooter carburetors & jets that can noticeably change how the engine behaves. Finding the right setting often takes some testing, so it helps to know what this part does.
Function and Importance
The needle runs through this jet and works with it to set the air and fuel blend going into the engine. Getting that blend right matters for both power and fuel economy. Many riders swap jets to adjust throttle response and general engine performance on their scooters.
Installation and Compatibility
Swapping a main jet in the carburetor is fairly straightforward. The new jet goes into the same spot the old one occupied. Before you change it, confirm the size of the jet you currently have so the replacement matches.
Specifications
- Size: #53
- Position: Main Jet
- Fits: Small Frame Vespa scooters with SHA/SHB 16mm and 19mm carbs, and PHBG carbs
Fitment
Fits:
- Vespa small frame (16mm and 19mm SHA/SHB carbs)
- PHBG carbs
How to choose: Pick the jet size that suits the main jet position on your carburetor. Main jets are available from 37 through 88, and this particular jet is #53.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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