| Also known as | H1781 |
| Diagram | Fig. 17 — NACELLE HEADLAMP AND SWITCHES · ref 1 |
| Subsystem | electrical |
| Listed in parts books | 1964–1966 |
Nacelle top
The upper shell of the headlamp nacelle housing on Triumphs from the mid-1960s, also listed as H1781.
The nacelle top is the upper shell of the headlamp nacelle assembly, the streamlined housing that sits above the front fork and carries the headlamp, speedo/tach mounts, and the switches. This is the top cover piece of that housing, part number 97-1781, listed in older parts books under H1781.
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It shows up in the catalog under the NACELLE, HEADLAMP AND SWITCHES figures, so it's tied directly to that whole nacelle assembly rather than to any single electrical component on its own. Catalog appearances for this one run from 1964 to 1966.
If you're sorting through a stack of nacelle pieces trying to figure out what you've got, this is the top half of the shell rather than the lower half or any of the internal mounting brackets. Bring in your old part or check it against your bike before ordering, since nacelle shapes and switch layouts changed across the years.
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