Details
| Diagram | Fig. 2 — Engine: Cylinder, Cylinder Head and Fittings · ref 13 |
| Subsystem | engine top |
| Listed in parts books | 1971–1972 |
Norton Valve Spring Outer
Outer valve spring for the cylinder head, part of the paired spring set that closes each valve.
PN · NM.22838
NM.22838 is listed in the parts books as a Valve Spring Outer, part of the cylinder head fittings on the engine top end. The outer valve spring is one half of the paired spring set that sits over each valve, working alongside the inner spring to keep the valve closed against its seat and under control through the cam's opening and closing action.
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