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| Listed in parts books | Not catalogued by year yet |
PISTONS TRI 500 8.5 58-66
Piston for the 500cc Triumph twin, listed as 8.5 compression, covering engine years 1958-66.
PN · R1620/100
This is a piston listing for the 500cc Triumph twin, called out in the catalog as an 8.5 compression piston covering engine years 58-66. The manufacturer code on file points to Amal, but Amal made carburetors, not pistons, so that tag looks like a mismatch in our records rather than a real fact about who cast this piston.
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We don't have much more detail to go on for this one beyond the catalog line itself. If you're rebuilding a 500 twin from that era and need pistons, call the shop and we can go over bore size, ring pack, and what's actually in stock before you order.
$86.95
Pin your bike to check this part fits.
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