| Also known as | B161A |
| Listed in parts books | Not catalogued by year yet |
RING SET BSA A50 +.040
Piston ring set for the BSA A50, sized +.040 over standard bore.
This is a piston ring set for the BSA A50, machined to the +.040 oversize for a rebore. The catalog number here is JRCBSAA50R/040, and it also shows up under the older B161A designation if that's what your parts book or engine records list.
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This is a BSA part, not a Triumph one — the A50 is BSA's own unit twin, and this ring set is sized specifically for an engine that's been bored out .040 over standard. If your barrels haven't been rebored to that spec, this isn't the set you want.
We don't have a lot more detail on file for this one beyond the oversize spec and the cross-number. Give us a call before ordering if you're not certain of your bore size or which A50 variant you're working with.
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