| Diagram | Fig. 1 — CYLINDER HEAD, EXHAUST PIPE · ref 31 |
| Subsystem | engine top |
| Listed in parts books | 1969–1970 |
BSA Rocker box gasket
A rocker box gasket for the cylinder head, part number 70-7857.
This is a rocker box gasket, part number 70-7857, sitting up top on the cylinder head. It shows up in the CYLINDER HEAD and EXHAUST PIPE sections of the parts book, which tells you it's part of the top-end sealing group rather than anything down in the cases.
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A gasket like this seals the rocker box to the head, keeping oil where it belongs instead of weeping out around the cover. The catalog only ties this one to appearances spanning 1969 to 1970, so if your bike falls outside that window, give us a call and we'll check it against your engine before you order.
We don't have more detail on this one beyond what's in the parts book. If you're not sure this is the right gasket for your rocker box setup, bring us the numbers off your head casting or call ahead and we'll sort it out.
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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