| Also known as | AA134 |
| Listed in parts books | Not catalogued by year yet |
RING SET BSA B50 +.020
Piston ring set for the BSA B50, sized for a +.020 oversize rebore.
This is a piston ring set for the BSA B50, machined to the +.020 oversize. It's listed under JRC's part number BSAB50R/020, with AA134 showing up as the older alternate number for the same set in some records.
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This is a BSA part, not a Triumph one — the B50 is a BSA single, and the ring set is sized for a rebore at the +.020 step rather than standard bore. If you've had a B50 barrel bored out to that size, this is the ring set that matches.
We don't have much more detail on file beyond the description and the oversize spec. Give the shop a call to confirm before you order, especially if you're not certain your bore has already been taken out to +.020.
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