| Listed in parts books | Not catalogued by year yet |
PISTONS 650 TRI 9:1 +030
A +030 oversize, 9:1 compression piston for the 650cc Triumph twin.
This is a piston listing for the 650cc Triumph twin, marked 9:1 compression and a +030 oversize. The R1675/030 number tells you two things right off: it's a thirty-thousandths overbore piston, meaning it's meant for a cylinder that's already been bored out that far, and it's built to the 9:1 compression ratio rather than a lower-compression version.
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The manufacturer tag on this one says Amal in our system, but Amal doesn't make pistons - they're a carburetor company. The description here is straightforward piston language, so treat the maker tag as noise and just go by what it says: a 650 Triumph piston at 9:1, +030 over standard.
Our records don't give us a figure title or model-year range to pin this to a specific machine, so before you order, measure your bore or check what's stamped on the piston you're pulling out. Oversize pistons only work if your cylinder has actually been machined to match - ordering the wrong size is a common and costly mistake at this end of the counter.
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