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Registered
Join Date: Dec 2007
Location: Just a little north of 13669/Nation's capital
Posts: 1,312
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Yes, the new second rings are indeed Napier cut. And Neil, you piqued my interest on the 2.8 mm oil rings being just a wider expander so I checked the rails. The 2 mm sets have rails .012" thick, the 2.8 mm ones are .015" thick. So percentage wise, about 20% thicker but significant, I don't know.
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1986 Targa Guards Red
2021 MT09 SP
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