Details
| Diagram | Fig. 4 — Engine: Crankcases, Crankcase Breather, Tachometer Drive · ref 5 |
| Subsystem | engine bottom |
| Listed in parts books | 1971–1972 |
Norton Main Bearing
Main bearing for the crankcase assembly, per Norton parts book records.
PN · 063114
This is a main bearing listed under Norton catalog records, turning up in the crankcase and crankcase breather section for the engine's bottom end. Main bearings like this one carry the crankshaft in the crankcases and let it spin true under load, so they're a foundational part of the bottom end assembly.
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