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Shop/Category/Parts catalog/RING SET T150+.040 DEVES
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Also known asMC-139/040
Listed in parts booksNot catalogued by year yet

RING SET T150+.040 DEVES

Piston ring set for the T150 triple, +.040 oversize, made by Deves.

PN · JRC 751R/040D
Available in 5 sizes (rebore oversizes):

This is a ring set for the T150 triple, sized at +.040 over standard bore, made by Deves. The catalog lists it under JRC 751R/040D, with MC-139/040 as an alternate number for the same set.

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This is an oversize ring set, meaning it's meant for a cylinder that's already been bored out .040 over standard at some point, not a stock-bore engine. If you're rebuilding a T150 and the barrels have been machined to that spec, this is the set that matches.

We don't have a lot more detail on file for this one beyond what's in the catalog listing. If you're not sure whether your barrels have been bored to +.040, measure before you order, and call the shop if you want to talk through it.

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