| Listed in parts books | Not catalogued by year yet |
PISTONS BSA A10 8.25 +030
Piston for the BSA A10 engine, 8.25 compression, +030 oversize.
This is a piston for the BSA A10 engine, listed at an 8.25 compression ratio and the +030 oversize. The +030 stamp means it's bored to a thirty-thousandths overbore, so it's meant for a cylinder that's already been taken out to that size, not a standard-bore barrel.
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We don't have much beyond the basic catalog line on this one - no figure title or broader listing history to draw from. If you're rebuilding an A10 top end and need to confirm ring specs, gudgeon pin fit, or exact compression numbers against your particular barrel, give us a call and we'll sort out the details before you order.
Worth noting this is a BSA A10 part, not a Triumph piston, so don't cross-shop it against unit or pre-unit Triumph twin pistons.
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