| Diagram | Fig. 5 — CARBURETTOR — AMAL CONCENTRIC — SERIES 1900 · ref 21 |
| Listed in parts books | Not catalogued by year yet |
PILOT JET MK1 MK2
Amal Mk1/Mk2 carburetor pilot jet, size #15, controls fuel mixture at idle.
This is a pilot jet for Amal Mk1 and Mk2 carburetors, the size marked #15 on the jet body. The pilot jet controls fuel delivery at idle and just off idle, so it's one of the smaller parts in the carb but one that has a real effect on how a bike starts, idles, and pulls away from a stop.
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Our records on this one are thin beyond what's printed on the jet and in the catalog listing, so we can't speak to broader fitment details here. If you're rebuilding or rejetting an Amal Mk1 or Mk2, it's worth having a small selection of pilot jet sizes on hand since idle mixture is one of the first things to check when a bike won't settle down at a stop light.
Give us a call if you want to confirm this is the right jet number for your carb before ordering.
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