| Diagram | Fig. 28 — CARBURETTER · ref 5 |
| Subsystem | fuel |
| Listed in parts books | 1969–1970 |
Throttle valve, size 3½
Amal size 3½ throttle valve (slide) for the carburetor, PN 19-3129 / 622/060.
This is an Amal throttle valve, size 3½, catalog number 19-3129 (also shown as 622/060). It's the slide that rides up and down inside the carburetor body, and the cutaway on its bottom edge is what shapes throttle response off idle before the needle jet takes over further up the throttle opening.
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The catalog places this valve under CARBURETTER, appearing across records from 1969 through 1970. If you're rebuilding a slide and it's worn or scored on the sides, it'll let air past and cause a hunting idle or flat spot, so it's worth checking the bore fit when you're in there anyway.
We show this listed under two numbers, 19-3129 and 622/060 — same physical part, just two different catalog forms. If you're ordering, have your carb's body number handy since Amal used a number of slide sizes across similar-looking carburetors.
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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