Shop/Category/Fig. 2 — Engine: Cylinder, Cylinder Head and Fittings/Norton Valve Spring Heat Insulator (2 only on Combat at exhaust position)
Details
| Diagram | Fig. 2 — Engine: Cylinder, Cylinder Head and Fittings · ref 10 |
| Subsystem | engine top |
| Listed in parts books | 1971–1972 |
Norton Valve Spring Heat Insulator (2 only on Combat at exhaust position)
Exhaust-position valve spring heat insulator, fitted two per engine on the Combat.
PN · NM.23392
NM.23392 is a valve spring heat insulator, fitted at the exhaust position on the cylinder head. The catalog notes this part was used two-per-engine on the Combat specification, sitting under or around the exhaust valve spring to shield it from the extra heat that engine was running.
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