Main Jet #82 for SI Carbs for Scooters & Mopeds
ITEM# TT-25744
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Description
Main Jet #82 for SI Carbs in Scooters and Mopeds
This main jet sits at the base of the main jet stack and is built for scooter and moped carburetors. The #82 number refers to its size, which controls how much fuel passes through. Changing jets is a routine part of tuning, so this component plays a useful role for anyone maintaining their scooter carburetors & jets.
Getting to Know Jet Sizes
Main jets come in a range of sizes, generally from 82 up to 165. Many vintage Vespa models run jets between 85 and 116, whereas engines that have been modified often need larger jets to perform well. A higher number on the jet means more fuel can flow through it, which may boost engine output.
Signs It May Be Time to Swap
If your scooter shows fuel delivery or performance problems, the main jet could be the reason to replace it. Keep in mind that finding the right jet often takes some experimenting, so you may need to make several adjustments to get the setup you want. Jetting instructions are a helpful resource for working through this.
Specifications
- Size: 82
- Position: Main jet stack
- Fits: SI carburetors (main jet stack position, size #82)
Fitment
How to choose: Check the number stamped on the jet and match it to what your engine requires. This part is #82, and available sizes run from 82 to 165, with most vintage Vespas using 85-116.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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