| Also known as | GAN03 |
| Listed in parts books | Not catalogued by year yet |
P/SET BSA A10+.040
A +.040 oversize piston set for the BSA A10 twin, also cataloged as GAN03.
This is a piston set for the BSA A10 engine, machined to a +.040 oversize for a rebore. The part number here (JRCBSAA10/040) is also known in some records as GAN03, so if your parts book or an old invoice shows that number, it is the same set.
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This isn't a Triumph part — the A10 is a BSA twin, and this listing is strictly for that engine family. Because it's a +.040 oversize set, it's meant to go with a cylinder that has already been bored out to that dimension, not a standard-bore engine.
We don't have much more detail on file for this one beyond the oversize spec itself, so if you're not certain your barrels have been bored to +.040, get your cylinder measured or give us a call before you order.
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