| Diagram | Fig. 2 — CARBURETOR AND AIR CLEANER · ref 20 |
| Subsystem | fuel |
| Listed in parts books | 1968–1974 |
| Also fits (as replacement) | 1968–1970, 1976–1978, 1980 · for 99-0506 |
Float chamber (99-0506)
Amal float chamber for carburetor fuel supply, cataloged as 622/050 (formerly 99-0506, later 622/055).
This is an Amal float chamber, cataloged as 622/050, with the earlier factory number 99-0506 also on record for the same part. It's the fuel reservoir bolted to the carburetor body that keeps a steady supply of gas ready for the mixing chamber, with a float and needle valve inside controlling the level.
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It turns up across a long run of Amal carburetor figures in the parts books, including entries for the T100 family, TR6R, TR6C, and T120R, spanning catalog years from 1968 into 1974. That's a wide net of appearances, so it was clearly a common piece across several Amal carb setups Triumph used in that era rather than something unique to one bike.
The factory eventually superseded this part with 622/055. If your parts book lists either the old 99-0506 number or 622/050, this is the one you're after — just check with us on which chamber your specific carb takes before ordering, since the exact carburetor model isn't spelled out plainly enough here to guarantee a match without a look at what's on your bike.
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