| Diagram | Fig. 4 — Engine: Contact Breaker, Timing Cover, Oil Pump, Oil Pressure Relief Valve · ref 30 |
| Subsystem | engine bottom |
| Listed in parts books | 1975 |
Norton Shim
A shim for the Norton engine's oil pressure relief valve, catalog number 06-7646.
This is a shim used with the oil pressure relief valve on the Norton engine, part number 06-7646. It shows up in the engine figures covering the contact breaker, timing cover, oil pump, and oil pressure relief valve area, so it lives down in the timing-side works where oil pressure gets regulated.
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The catalog only shows this one appearing for the 1975 model year in our records, and it's a single small item, not a kit or assembly. If you're rebuilding the oil pressure relief valve, this is the kind of part worth checking against the rest of what's in there before you put it all back together.
Same physical part has also been catalogued under NM15404 and 067646, so if your parts book or an old invoice shows either of those numbers, it's the same shim.
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