| Listed in parts books | Not catalogued by year yet |
MAIN JET 150 PREMONOBLOC
A size 150 main jet for the Amal Premonoblac carburetor.
This is a size 150 main jet for the Amal Premonoblac carburetor. The main jet controls fuel delivery through the mid-to-upper throttle range, and swapping jet sizes is one of the standard ways to tune a Premonoblac for a given engine, exhaust, and air filter setup.
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The part number stamped here, 4/042-150, is Amal's own numbering for the Premonoblac series, with the 150 denoting the jet size. We don't have much more history on this specific listing beyond that it's cataloged as a Premonoblac main jet.
If you're not sure which jet size your carb is currently running or whether 150 is right for your setup, give us a call and we can talk through it before you order.
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