| Listed in parts books | Not catalogued by year yet |
PISTONS TRI 3T 350 PU 8.5
Oversize (.050) piston for the Triumph 3T pre-unit 350 twin.
This is a piston listed for the Triumph 3T, the pre-unit 350 twin. The part number carries the .050 oversize designation, which tells you it's a rebore piston sized up from standard rather than a stock replacement, and the catalog notes an 8.5 compression figure with it.
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The manufacturer tag on this listing points to Amal, but Amal made carburetors, not pistons, so don't read too much into that field. What you're getting is a piston for the 3T pre-unit engine, sold as an oversize part for a rebore job.
We don't have much more detail on this one beyond what's above. If you're rebuilding a 3T motor and need to confirm ring sizes, gudgeon pin fit, or exact bore spec, call the shop and we'll go over it with you before you order.
Sorry if we got something wrong here. If you think this information isn't correct, .