Jet, Idle #42 for SHA/SHB for Scooters & Mopeds

Idle Jet #42 for SHA/SHB Carburetors on Scooters and Mopeds

This idle jet is made for SHA/SHB carburetors found on a range of scooters and mopeds. It controls how fuel and air combine at low engine speeds, which supports smoother running. You can browse our carburetor parts and jets for scooters to find related items. Getting the jetting right can help with starting difficulties and rough idling, and it contributes to how well your vehicle runs overall.

What This Part Does

This jet helps set the fuel-air balance in your engine at idle. Signs such as bogging or surging can suggest that it's time to swap it out. For the best results, the jet size needs to suit your carburetor.

Specifications

• Size: 42
• Position: Idle jet
• Fits: Small Frame Vespa 50 and 90 scooters with SHA/SHB carburetors (idle jet size 42)

Fitment

Fits:

• Vespa 50 (SHA/SHB carburetor)
• Vespa 90 (SHA/SHB carburetor)

How to choose: For Vespa 50 and 90 models, use the 42 idle jet. The Primavera takes a 45 instead.

Shop more: Scooter Carburetors & Jets · Scooter Parts