| Listed in parts books | Not catalogued by year yet |
PISTON BSA GS CLUB 9 +030
Oversize (+030) piston for the BSA Rocket Gold Star club racing application.
This is a piston listed for the BSA Rocket Gold Star (GS) club racing application, in the +030 oversize. The catalog line reads "PISTON BSA GS CLUB 9 +030," which tells us it's an oversize piston sized for a rebore, not a standard-bore replacement.
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This is a BSA part, not a Triumph one — the description names the Rocket Gold Star plainly, and the manufacturer code on file for this listing doesn't match up with who actually made pistons, so don't read anything into that tag.
We don't have more detail on this one beyond what's on the tag. If you're rebuilding a Rocket Gold Star top end and need to confirm bore size, ring diameter, or gudgeon pin fit before you order, give the shop a call and we'll go over it with you.
Sorry if we got something wrong here. If you think this information isn't correct, .