| Diagram | Fig. 5 — Gearbox: Shell, Gear Cluster, Mounting Bolts, Adjuster and Countershaft Sprockets · ref 22 |
| Subsystem | gearbox |
| Listed in parts books | 1975 |
Norton Gear, 3rd, Layshaft
Layshaft third gear for the gearbox cluster, catalog part 04-0634.
04-0634 is a layshaft third gear out of the gearbox cluster. In the catalog record it shows up under the Gearbox figure covering the shell, gear cluster, sprocket, and mounting bolt, so this is one of the gears that rides on the layshaft inside the gearbox shell, meshing with its mate on the mainshaft to give you third gear.
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Our record only ties this part to a single catalog year, 1975, and doesn't spell out which specific model it was fitted to beyond that. If you're rebuilding a layshaft cluster and need to match tooth count and profile, bring the old gear in or have the numbers off your box handy so we can confirm before you order.
Given how gear clusters get mixed and matched over the years, it's worth double-checking this one against what's actually in your gearbox rather than going by year alone.
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