| Diagram | Fig. 29 — CARBURETTERS (Plate 22) · ref 10 |
| Subsystem | fuel |
| Listed in parts books | 1969–1972 |
Main jet, size 180 c.c.
An Amal carburetor main jet, size 180, part 19-2878 (also listed as 376/100).
This is a main jet for an Amal carburetor, size 180. It's a small brass-bodied jet that threads into the base of the float bowl assembly and controls fuel delivery through the main circuit, which is the range that matters most from around a third throttle up to full throttle. The number 180 refers to the jet's flow size, not a thread spec, so match it against what your carb is currently running before you swap it in.
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The catalog lists this under two numbers, 19-2878 and 376/100, which are just two ways the same physical jet has been recorded across the parts books. It shows up across several carburetor figures spanning 1969 through 1972, which tells us it was a running production item on Amal carbs of that era rather than something tied to one specific model.
Jets are cheap insurance to have a few sizes of on the shelf since tuning is trial and error, but we won't guess at what your bike needs — that depends on your setup, altitude, and how the engine's breathing. Bring in what you've got or call ahead and we'll talk through it.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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