| Diagram | Fig. 7 — CARBURETOR T140E · ref 15 |
| Subsystem | fuel |
| Listed in parts books | 1979–1980 |
376/100 — Mainjet
Amal Mk II Concentric carburetor main jet, size 376/100, used in the T140E/T140D carb setup.
This is a main jet for the Amal Mk II Concentric carburetor, listed under the 376/100 jet size designation. It shows up in the parts-book figures for the T140E and T140D carburetor setup, where it's one of the metering jets that controls fuel delivery through the main circuit of the carb.
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The main jet is a small brass-type fitting that threads into the base of the float bowl and sets how much fuel gets pulled into the airstream once the throttle opens past the pilot/idle range. On the Amal Concentric, it's a serviceable item you can pull and swap without tearing into the whole carb.
Our catalog record ties this one to the T140E and T140D carburetor figures from 1979-1980. If you're working on a different year or carb variant, check the jet size stamped on your existing part before ordering to make sure 376/100 is the right one for your setup.
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