55/160 Idle Jet - Dell'Orto/ SI Carburetors for Scooters & Mopeds

55/160 Idle Jet for Dell'Orto and SI Carburetors on Classic Scooters

This 55/160 idle jet helps tune Dell'Orto and SI carburetors, which is useful when you are dialing in a classic scooter. It meters fuel and air at low throttle openings, so it plays a direct role in how the engine behaves in that range. You can find it alongside other carburetor parts and jets for scooters. It is made for a number of older models, including large-frame Vespas and the Stella 2T.

How the Idle Jet Works

At low speeds, the 55/160 idle jet regulates how much fuel and air pass through the carburetor. Changing the idle jet lets you adjust throttle response and how the engine runs overall. In classic models, this component is important for keeping combustion clean and efficient.

When to Replace Your Idle Jet

Poor throttle response or an unsteady idle are signs the idle jet may need replacing. Keeping up with routine checks can head off performance problems and keep your scooter running well. For anyone comfortable working with their scooter's carburetor, this jet is a simple part to install.

Specifications

• Part Type: Idle Jet
• Jet Size: 55/160
• Carburetor Family: Dell'Orto and SI
• Fits: Dell'Orto and Spaco SI carburetors on vintage Vespa large-frame and Stella 2T scooters

Fitment

Fits:

• Stella 150 2T
• Vespa Vintage Large Frame: VNL GT/GTR, VLB Sprint, VSC SS 180, VNC 125 Super, VBA, VBB, VBC 150 Super, VSD Rally 180, VSX P/PX 200 E, VLX P/PX 150, VNB, VSB GS 160, VSE Rally 200, VNX P/PX 125, VLA GL150
• Vespa P/PX Series: VSX P/PX 200 E, VLX P/PX 150, VNX P/PX 125

How to choose: Only use this on a Dellorto or Spaco SI carburetor. The 55/160 size refers to the fuel bore and air passage, so confirm that it matches your current idle jet before you swap it in.

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