| Diagram | Fig. 29 — CARBURETTERS (Plate 22) · ref 5 |
| Subsystem | fuel |
| Listed in parts books | 1969–1972 |
Throttle valve — number 3 cutaway
Amal carburetter throttle valve, number 3 cutaway, part 19-3108 (also listed as 928/060).
This is an Amal throttle slide, cataloged as a number 3 cutaway, listed under the part number 19-3108 and also carried in the parts books as 928/060. The throttle valve (slide) sits inside the carburetter body and rides up and down on the throttle cable, controlling how much air and fuel gets pulled into the engine as you roll on the twistgrip.
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The cutaway number stamped into this slide affects how the carburetter responds just off idle, before the main jet and needle take over further up the throttle range. Amal carburetters were built with different cutaway slides available so the same body could be tuned for different engines and states of tune, so a number 3 cutaway is a specific tuning setting, not a universal replacement.
This part shows up across our carburetter figures for several catalog years. If you're chasing a flat spot or a stumble low in the rev range, the cutaway number on your existing slide is worth checking before you order — swapping cutaways is a common tuning move, but you want to know what you're replacing.
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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