Main Jet #107, SI Carbs for Scooters & Mopeds
ITEM# TT-26452
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Description
Main Jet #107 for SI Carburetors in Scooters and Mopeds
The Main Jet #107 is a key part of SI carburetors and turns up in a range of scooters and mopeds. It controls how much fuel reaches the engine, which helps it run as it should. It is one of the scooter carburetors & jets that you can swap out when tuning. This jet is generally a good match for vintage Vespa engines, especially those that call for jets in the 85-116 size range.
What the Jet Numbers Mean
Jets are sold in sizes from 82 to 165. The number you pick changes how much fuel gets through: a higher number lets more fuel flow. Riders sometimes modify their engines for more power, and that can mean moving to a larger jet to supply the extra fuel the engine uses.
Signs It May Be Time to Swap the Main Jet
A main jet change is commonly done during carburetor tuning or when fuel delivery seems off. Getting the jetting right often takes some trial and error before the engine performs the way you want, so it is a routine job for anyone looking after their scooter or moped.
Specifications
- Size: 107
- Position: Bottom of main jet stack
- Fits: Si carburetors (main jet size 107, bottom of main jet stack)
Fitment
How to choose: Pick the #107 main jet only when your carburetor's main jet stack holds a jet at the bottom and your tuning requires size 107. Available jets run from 82 to 165.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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