| Also known as | T4168 |
| Diagram | Fig. 11 — GEARBOX SHAFTS AND GEARS · ref 7 |
| Subsystem | gearbox |
| Listed in parts books | 1971–1972 |
Layshaft third gear (23T)
Layshaft third gear (23 teeth) for the gearbox internals, also catalogued as T4168.
Part number 57-4168 is the third gear off the layshaft inside the gearbox, cut with 23 teeth. Older parts books list this same piece as T4168, so if you're working from a vintage catalog with the letter-prefix numbering, that's the part you're cross-referencing here.
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This gear lives in the gearbox internals, on the layshaft (also called the countershaft in some catalogs), where it meshes with its mating gear to give you third gear ratio. It shows up in the parts-book figure covering the gearbox shafts and gears, so it's sold and fitted alongside the rest of the shaft and gear cluster rather than as a stand-alone item most riders replace on its own.
Catalog records show this number appearing across entries from 1971 to 1972. If you're not certain your gearbox is running this exact tooth count and generation of layshaft third, give us a call and we'll confirm fitment before you order.
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