| Also known as | 15900 |
| Listed in parts books | Not catalogued by year yet |
PISTONS A65 .040 JCC TAIW
A .040 in. oversize piston for the BSA A65 twin.
This is a piston for the BSA A65 twin, listed at .040 in. oversize. The catalog entry we have on this one is brief, and the manufacturer tag on file for this part number isn't reliable, so I'm not going to guess at material, ring count, or gudgeon pin fit beyond what's stated here.
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The A65 is a BSA engine, not a Triumph, so if you're working on a Triumph twin this one isn't for your bike. If you've got an A65 apart and are boring to take up wear, .040 over is the oversize called out on this part number.
Give the shop a call before you order to confirm this matches what your barrel has been bored to and what else you need alongside it — we don't have enough on file here to walk you through the whole fitment picture.
Sorry if we got something wrong here. If you think this information isn't correct, .