| Diagram | Fig. 17 — NACELLE HEADLAMP AND SWITCHES · ref 37 |
| Subsystem | electrical |
| Listed in parts books | 1964–1966 |
Horn, type 8H
Lucas type 8H horn, part number 70164, used in the mid-1960s nacelle/electrical setup.
This is the Lucas type 8H horn, part number 70164, listed in the electrical section of the parts books alongside the nacelle headlamp assembly and the ignition coils, rectifier and zener diode setup. It's the warning horn fitted as part of the bike's charging and lighting electrics rather than anything mechanical.
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In the parts books it turns up in the nacelle figures as well as the coil/rectifier figure, which tells you it shares wiring and mounting space with the rest of the front electrical cluster under and around the headlamp nacelle. Catalog appearances for this number run from 1964 to 1966.
If you're chasing one down for a rebuild, check your own wiring diagram against what's listed here before you order, since the catalog only confirms it as a Lucas 8H horn used in that era's electrical layout.
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