| Also known as | WW26678 |
| Diagram | Fig. 34 — SPEEDOMETER AND TACHOMETER · ref 30 |
| Subsystem | electrical |
| Listed in parts books | 1969 |
TACH,BLACK FACE COPY 4:1
A black-face 4:1 ratio tachometer, cataloged under speedometer and tachometer fittings, also known by the alias WW26678.
This is a black-faced tachometer listed in the parts book under the SPEEDOMETER AND TACHOMETER section, cataloged as a 4:1 drive ratio unit. It also shows up in our records under the alias WW26678, which is worth checking against your own paperwork if you're trying to match up a used or replacement gauge.
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A tach like this mounts on the top of the fork or in a bracket alongside the speedo, and it reads engine RPM off the drive taken from the gearbox or timing side, depending on how the bike is set up. The 4:1 ratio refers to how the internal gearing translates crank or cable speed into a face reading, so if you're pairing this with a replacement drive or cable, that ratio needs to match up.
Our catalog record ties this to a single model year and doesn't spell out which machine it originally left the factory on, so if you're sourcing this for a specific bike, give us a call and we'll help confirm it works with what you've got before you order.
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