| Diagram | Fig. 4 — Engine: Crankcases, Crankcase Breather, Tachometer Drive · ref 9 |
| Subsystem | engine bottom |
| Listed in parts books | 1971–1973 |
Norton CYLINDER BASE STUD,STEPPED (2 REQUIRED)
A stepped cylinder base stud, two required per engine, for securing the cylinder block to the crankcase.
This is a cylinder base stud, the stepped type, from our records under part number 062640. It's one of the studs that hold the cylinder block down to the crankcase, and the catalog notes that two are required per engine, so if you're replacing them you'll want to know how many your motor uses and check the others while you're in there.
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The stepped design means the stud has two different diameters or thread pitches along its length, which is common on cylinder base studs so the crankcase-end thread and the head-end thread can each be matched to what they're seated in. We don't have a lot more detail on this one beyond what's on the tag, so if you're unsure this is the right stud for your application, give us a call before you order and we'll help confirm it.
The manufacturer listed in our system for this part looks off given what the description actually says it is, so don't read too much into that — go by the description and figure context instead.
Sorry if we got something wrong here. If you think this information isn't correct, .