| Diagram | Fig. 36 — SPEEDOMETER AND TACHOMETER · ref 1 |
| Subsystem | electrical |
| Listed in parts books | 1980, 1983, 1985 |
SPEEDOMETER 150 MPH c/w trip control
A 150 mph speedometer with trip control, from Triumph instrument fitments appearing in catalogs from 1980 to 1985.
This is the 150 mph speedometer with trip control that shows up in the speedometer and tachometer section of the parts books. It's an instrument, not a mechanical part, and its job is straightforward: tell you how fast you're going and let you zero out a trip mileage figure when you need to measure a set distance.
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The catalog record for this one spans appearances from 1980 through 1985, so it's tied to instrument setups from that era, though we don't have specifics tying it to one particular model beyond that. If you're replacing a speedo on an older machine, check the drive fitting and cable end at the back of the unit before you order, since instrument faces and housings changed over the years even when the mph range reads the same.
A speedometer like this reads off the front wheel via a drive cable, so when you're troubleshooting a non-working or erratic gauge, the cable and its drive gearbox are usually the first things to check alongside the head itself.
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