| Listed in parts books | Not catalogued by year yet |
PILOT JET MK1 MK2
Amal Concentric #25 pilot jet for Mk1 and Mk2 carburetors, controlling idle and low-speed fuel mixture.
This is the pilot jet, size 25, for the Amal Concentric carburetor, covering both the Mk1 and Mk2 versions. It's the removable brass jet that governs fuel supply at idle and low throttle openings, the part most riders mean when they talk about a bike running rough or hunting at a stoplight.
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The #25 size sits in the middle of the range Amal offered for these carbs and is the one most commonly fitted across the Concentric family covered by this listing. It's a small, inexpensive part to keep on the shelf, and swapping it is one of the more accessible ways to fine-tune idle mixture without touching the rest of the carb.
We don't have detailed catalog history logged for this specific PN beyond the jet identification itself, so if you're chasing down an exact fitment for a Premier Concentric or a non-standard carb setup, give us a call and we'll help sort it out before you order.
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