| Also known as | GAN45 |
| Listed in parts books | Not catalogued by year yet |
PISTON BSA B44 +.020
A plus .020 oversize piston for the BSA B44, for a cylinder that has been rebored to that size.
This is a piston for the BSA B44, sized at plus .020 over standard. That oversize marks it as a rebore piston, meant for a cylinder that's already been taken out .020 inch to clean up wear or damage on a used barrel.
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This part shows up in our records under the alias GAN45 as well, so if your build sheet or an old invoice lists that number, it's the same physical piston. We don't have additional catalog history on this one beyond the basic listing, so if you're not sure whether your barrel has already been bored to this size, get your cylinder measured before you order.
Worth noting this is a BSA part, not a Triumph piece, in case it landed on your list by way of a mixed parts bin or a shared supplier. Give us a call if you want to talk through fitment before committing.
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