| Diagram | Fig. 1 — Engine: Crankshaft, Connecting Rods, Pistons, Camshaft, Timing Gear · ref 5 |
| Subsystem | engine bottom |
| Listed in parts books | 1971–1972 |
Norton Big End Shell Lower
Lower big end bearing shell for the connecting rod journal on the crankshaft, from a 1971-1972 engine listing.
This is the lower half of a big end shell bearing, the part that sits between the connecting rod and the crankshaft's big end journal. It's a plain bearing shell, one of the pair (upper and lower) that make up the full bearing at that rod journal, and it turns up in the engine figure covering the crankshaft, connecting rods, pistons, camshaft, and timing gear.
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The catalog record we have for this one is thin, just the one listing tied to the 1971-1972 span. We don't have more detail on this one beyond that, so before you order, call the shop and we'll confirm it's the right shell for your crank and rod setup.
Big end shells wear over time from oil film breakdown and normal running, and they're generally replaced as a matched pair with the upper shell rather than on their own. Bring in your old shells or crank measurements if you can, since getting the fit right matters more here than on most parts.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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