Main Jet #93 for SI Carbs for Scooters & Mopeds
ITEM# TT-25779
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Description
Main Jet #93 for SI Carbs in Scooters and Mopeds
This main jet is built for SI-style carburetors used on a range of scooters and mopeds. Its bore size controls how much fuel passes through, and the available sizes run from 82 to 165. The 93 version suits vintage Vespas and can also serve engines with performance tuning that call for a different fuel mix. It belongs to the group of scooter carburetors & jets that have a direct effect on how an engine runs.
How Jet Size Works
Main jets are offered in many sizes, and each one sets the volume of fuel that reaches the engine. A higher number lets more fuel through, which matters when tuning an engine, particularly one that has been modified. If you notice problems with power or fuel use, changing the jet size may help.
Signs It May Be Time to Swap
A main jet usually needs replacing when the engine or carburetor setup has been altered. If you have changed your scooter to improve performance, a different jet may be required to meet its new fuel demands. Routine tuning and test runs make it easier to pinpoint the best jet for your particular build.
Specifications
- Size: 93
- Position: Main jet area of SI carburetors
- Fits: SI carburetors, main jet #93 (scooters and mopeds)
Fitment
How to choose: Pick a #93 main jet only when your carburetor is an SI type and your tuning specifies 93; you can usually read the size stamped on the existing jet.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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