| Diagram | Fig. 6 — Gearbox: Shell, Gear Cluster, Sprocket, Mounting Bolt · ref 24 |
| Subsystem | gearbox |
| Listed in parts books | 1975 |
Norton Gear, 2nd, Layshaft
Layshaft second gear for the Norton gearbox cluster, PN 06-4639.
This is the layshaft second gear out of the Norton gearbox, listed in the catalog under the Shell, Gear Cluster, Sprocket, Mounting Bolt figure. It's one of the gears riding on the layshaft inside the gearbox shell, part of the cluster that gives you your ratios as the box shifts through ist range.
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Our record on this one only ties it to a single catalog appearance dated 1975, so we don't have a broader spread of years to point to. If you're rebuilding a box and matching gears by tooth count and cluster fit, bring the old part along or have your gearbox open so we can check it against what you're pulling out.
Given how thin the catalog trail is on this number, treat it as a lead rather than a guarantee of fit — give the shop a call with your gearbox specifics before you order.
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