| Diagram | Fig. 8 — CARBURETOR TR7RV · ref 22 |
| Subsystem | fuel |
| Listed in parts books | 1968–1970, 1976–1978, 1980 |
Float needle (622/068)
Float needle for Amal Concentric carburetors, catalog number 99-0511 (Amal 622/068), later superseded by 622/197.
This is the float needle for the Amal Concentric carburetor, catalog number 99-0511, also known by the Amal part number 622/068. It's the small tapered valve that sits in the float bowl and shuts off fuel flow once the float rises to its set level, keeping the bowl from overfilling and flooding the engine.
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It shows up across a wide range of Amal Concentric carburetor listings in our catalog, including TR7RV and T140V carbs, the general Concentric figures, and the earlier T90, T100S, T100C, T100T, and T100R carburetor listings. That spread tells you this needle was used across a lot of different Concentric carb builds over the years rather than being unique to one model.
The factory later replaced this part number with 622/197, so if your carb parts diagram or a rebuild kit lists that number instead, it's the same job being done. Worth checking which one your carburetor calls for before ordering, since kits and diagrams from different eras will reference one or the other.
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