| Diagram | Fig. 5 — Gearbox: Shell, Gear Cluster, Mounting Bolts, Adjuster and Countershaft Sprockets · ref 31 |
| Subsystem | gearbox |
| Listed in parts books | 1975 |
Norton Lock Washer, Sprocket
A gearbox sprocket lock washer, listed under Norton gearbox parts for 1975.
This is a lock washer for the gearbox sprocket, listed in the catalog under the gearbox shell, gear cluster, sprocket, and mounting bolt figure. It's a small hardware piece that sits behind the sprocket retaining nut and keeps that nut from working loose once torqued down.
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The catalog ties this part to a 1975 appearance, and the manufacturer group associated with this number is Norton rather than Triumph. If you're sourcing this for a gearbox rebuild, check it against your own parts book before ordering since our record on this one is a single line entry.
It's a straightforward item — no moving parts, no adjustment, just a tab or lock washer doing its job of holding the sprocket nut in place. Call the shop if you want us to confirm it matches what's on your bench.
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