| Diagram | Fig. 4 — Engine: Crankcases, Crankcase Breather, Tachometer Drive · ref 1 |
| Subsystem | engine bottom |
| Listed in parts books | 1971–1972 |
Norton Crankcase Halves Assembled
Norton crankcase halves, assembled as a joined pair, with breather and tachometer drive passages built in.
This is a Norton part, listed in the catalog as Crankcase Halves Assembled. It's the bottom-end casting assembly that the crankshaft and its bearings live inside, and on this listing it comes as a matched, joined pair rather than two separate castings sold apart.
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The figure this part appears under also covers the crankcase breather and tachometer drive, which tells you this casting has the machined passages and mounting points for those items built into it. Beyond that, our catalog record on this one is brief.
The listed years on this part run 1971 to 1972 in our records. Call the shop and we'll confirm fitment against your specific machine before you order, since crankcase castings are not something you want to guess on.
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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