Main Jet #88, SI Carbs for Scooters & Mopeds
ITEM# TT-26283
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Description
Main Jet #88 for Scooter and Moped Carburetors
This small, cone-shaped piece sits inside the main jet stack of a scooter carburetor and controls how much fuel passes through. It fits a range of scooter and moped models. At #88, it allows a higher fuel flow, which suits performance-modified engines that need more fuel. You can find it among the scooter carburetors & jets if you need to change your engine's tuning.
What the Jet Numbers Mean
Main jets are made in sizes from 82 up to 165. Most vintage Vespa models use jets in the 85 to 116 range. Engines that have been upgraded for more power usually run larger jets, since they draw more fuel while running.
Fitting and Tuning
Swapping the main jet is simple enough to do at home. Getting the right result often takes some trial and error, so expect to make adjustments. For jetting techniques, consult trusted references to keep the engine running properly.
Specifications
- Size: #88
- Position: Bottom of the main jet stack
- Fits: SI carburetors on scooters and mopeds, sized #88 (main jet stack, bottom position)
Compatibility
Fits:
- Vintage Vespa (SI carburetor, main jet #85-116 range)
How to choose: Compare the number stamped on your existing main jet, or use the size your tuning specifies. The available sizes span 82 to 165, and a higher number allows more fuel to flow.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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