| Listed in parts books | Not catalogued by year yet |
OIL RING BSA B50 +.040
Oil control ring for a BSA B50 engine, machined +.040 over standard bore.
This is an oil control ring for a BSA B50, machined to +.040 over standard bore. It's part number 71-2157 in the parts records, and the catalog description is specific about the oversize spec, so this is meant for a cylinder that's already been rebored to that dimension, not a standard-bore engine.
Read more
We don't have much more detail on this one beyond the description itself. If you're piecing together a ring set for an oversized B50 bore, check your piston and bore spec against the +.040 callout before you order.
Give us a call if you want to confirm this is the right oversize for your rebuild before it goes in the mail.
Sorry if we got something wrong here. If you think this information isn't correct, .