PISTONS 650 TRI 11:1 +010

Name: Pistons 650 Tri 11:1 +010
SKU: JRC 650/010HC

A +010 oversize 11:1 high-compression piston for the 650 Triumph twin.

PN · JRC 650/010HC

Available in 8 sizes (rebore oversizes):

STD · 7:1 compression, T120 spec STD · JCC brand +.010 · generic/unbranded+.010 · 11:1 high compression+.020 · 7:1 compression (L spec)+.020 · JCC brand +.030 · JCC brand +.040 · GPM brand +.040 · 7:1 compression (L spec)+.040 · JCC brand +.060 · Powermax 10:1 high compression +.060 · 7:1 compression (L spec)+.060 · JCC brand +.080 · JCC brand +.100 · JCC brand

This is a 650 Triumph piston, listed as a +010 oversize with an 11:1 compression ratio. JRC part numbers like this one show up on the counter when someone's had a cylinder rebored and needs pistons to match the new bore size, and the +010 marking tells you it's sized for a bore that's been taken out ten thousandths over standard.

The 11:1 compression figure means this is a high-compression piston, built for performance work rather than a stock replacement, so it's worth checking what your head, cam, and fuel setup can handle before running it. We don't have more detail on file for this one beyond what the catalog description gives us, so if you've got questions about ring sizing, gudgeon pin fit, or which 650 twin this pairs with, give the shop a call and we'll sort out fitment before you order.

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