| Diagram | Fig. 4 — Engine: Contact Breaker, Timing Cover, Oil Pump, Oil Pressure Relief Valve · ref 42 |
| Subsystem | engine bottom |
| Listed in parts books | 1975 |
Norton Spring
A spring for the oil pressure relief valve assembly on the timing cover, per Norton part 06-6198.
This is a spring listed under Norton's part number 06-6198, appearing in the catalog with the timing cover, contact breaker, oil pump, and oil pressure relief valve. The figure grouping points to it being part of the oil pressure relief valve assembly, where a spring holds a plunger or ball against seat pressure to control oil pressure in the system.
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The catalog only shows this part appearing once, for the 1975 model year, so we don't have more detail on it beyond that single listing. If you're chasing down an oil pressure relief valve spring for a rebuild, this is worth checking against your own parts book to confirm it's the right one before ordering.
Given how little the record tells us beyond the figure grouping, give the shop a call and we'll help confirm fitment before you buy.
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