| Diagram | Fig. 8 — CARBURETOR TR7RV · ref 13 |
| Subsystem | fuel |
| Listed in parts books | 1968–1970, 1975–1980, 1983, 1985 |
Air adjusting screw (622/076)
Air adjusting screw for Amal Concentric carburetors, sets idle mixture; factory number 99-0515, later listed as 622/076.
This is the air adjusting screw for Amal Concentric carburetors, part number 99-0515, which the factory later listed under 622/076. It's a small, simple part but it's the one you turn to set the air/fuel mixture at idle and just off idle on Concentric-carb Triumphs.
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The catalog shows this screw across a long run of Amal Concentric setups, from Mk I carbs on TR7RV models through Mk II carbs on T140E and T140D machines, and it also turns up in listings for T90, T100S, T100C, T100T and T100R carburetor assemblies. If your bike runs an Amal Concentric, this is likely the screw your carb uses, but check your own carb body against the parts book before ordering since specific carb variants can differ.
It's a wear item worth having on hand — the tip can get chewed up from repeated adjustment or a heavy hand with a screwdriver, and a worn screw makes it hard to get a clean, stable idle mixture.
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