| Listed in parts books | Not catalogued by year yet |
PISTONS TRI 650 10:1 .070
A .070-over 10:1 compression piston for the Triumph 650 twin.
This is a piston listing for the Triumph 650 twin, sized at .070 over standard and set up for a 10:1 compression ratio. The R1611/070 number is how this size shows up in the piston supplier's own numbering rather than a Triumph factory part number, which is common with piston sets since they get sold by oversize and compression rather than by original-equipment code.
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We don't have more detail on this one beyond the basic listing, so if you're rebuilding a 650 twin and are looking at an oversize rebore, give the shop a call and we'll confirm which specific engine and bore spec this piston is meant for before you order. Piston selection needs to match your actual bore measurement and head setup, so it's worth talking it through rather than guessing off the part number alone.
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