| Also known as | 622/055S |
| Diagram | Fig. 5 — CARBURETOR · ref 20 |
| Subsystem | fuel |
| Listed in parts books | 1971, 1973–1974 |
| Also fits (as replacement) | 1968–1974 · for 622/050 |
Float chamber (99-0506)
Amal carburetor float chamber, PN 622/055, the fuel-holding bowl beneath the carb body; supersedes 622/050.
Part number 622/055 is a float chamber for an Amal carburetor, also listed under the alternate number 622/055S and cross-referenced to 99-0506. This is the bowl that sits below the carburetor body and holds a working supply of fuel for the float and needle assembly to meter, keeping fuel ready at the jets whether the bike is idling or under load.
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This PN shows up in the catalog across carburetor figures for TR7RV, T140V, TR6R, TR6C, and T120R applications, spanning catalog years 1971 through 1974. It supersedes the earlier factory number 622/050, so if your parts book or an old invoice shows that number, it's the same physical piece under a later part number.
If a float chamber is cracked, warped, or has a bad seal where it meets the carb body, you'll get fuel leaks or flooding. Worth checking the fit against your existing carb before ordering, since Amal used a few different float bowl types over the years.
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