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Shop/Category/Fig. 34 — CARBURETTER (Plate 24)/Throttle needle
Throttle needle
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DiagramFig. 34 — CARBURETTER (Plate 24) · ref 24
Subsystemfuel
Listed in parts books1970–1971

Throttle needle

Amal carburetor throttle needle, PN 19-3137 (Amal ref 622/124), fits into the slide to meter fuel with throttle opening.

PN · 19-3137 / 622/124

This is the throttle needle for an Amal carburetor, listed under 19-3137 with the alternate Amal reference 622/124. The needle rides inside the carburetor slide and works with the needle jet to meter fuel as you roll the throttle open, so it has a direct hand in how the engine responds off idle and through the midrange.

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Our catalog shows this part turning up across carburetor and air cleaner figures in the parts books, with appearances running 1970 to 1971. It's a small, easily overlooked piece, but a worn or wrong needle can throw off carburetion even when everything else on the carb is right.

If you're rebuilding a slide or chasing a flat spot in the throttle response, it's worth checking this needle against what your parts book calls for before you order. Give us a call if you want to confirm which needle your particular carb setup needs.

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