| Diagram | GEARBOX SHAFTS AND GEARS |
| Subsystem | gearbox |
| Listed in parts books | Not catalogued by year yet |
Speedometer pinion, solo (10T)
A 10-tooth speedometer drive pinion for the solo application, fitted inside the gearbox.
This is a speedometer pinion, the small gear that rides in the gearbox and turns the drive for the speedometer cable. The catalog lists it as a 10-tooth pinion for the solo application, meaning a sidecar-equipped machine would use a different tooth count to get correct speedo readings on that setup.
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It shows up in the gearbox shafts and gears section of the parts book, so it lives down inside the transmission where it meshes with the mainshaft or layshaft gear to drive the speedo drive gear housing. The manufacturer tag on this one reads Lucas, but a speedometer pinion is a gearbox part, not an electrical part, so take that tag with a grain of salt.
Our record on this one is thin - it only turns up once in the catalog, tied to 1964. We don't have anything more specific on which gearbox or model it was fitted to, so call the shop and we'll confirm fitment before you order.
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