| Diagram | Fig. 10 — Inner and Outer Chaincase, Hydraulic Tensioner · ref 14 |
| Subsystem | primary |
| Listed in parts books | 1975 |
Norton Sealing Washer, Drain Screw
Sealing washer for the primary chaincase drain screw.
This is a sealing washer that seats under the drain screw on the primary chaincase, the part that lets you drain the oil out of the chaincase without leaving a mess or a slow leak afterward. It shows up in the parts book under the Inner and Outer Chaincase and Hydraulic Tensioner figure, which places it right where the primary chain and its tensioner live.
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The catalog only ties this one to a single model year, so we don't have a wide fitment picture on it beyond that. If you're rebuilding a chaincase or just chasing a drain screw that seeps, it's worth having a fresh one of these on hand rather than reusing an old crushed washer.
Call the shop if you want us to confirm it matches what's on your bike before you order.
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