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Author Topic: M90 Re-thinking 2nd O-ring Removal ?  (Read 2450 times)

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Re: M90 Re-thinking 2nd O-ring Removal ?
« on: December 06, 2020, 06:08:52 pm »
The reports of early users were of early ring failure, and what appeared to be heat of friction induced damage to the rings, and if I remember correctly, cylinder wall scoring from piston scuffing.
The prevailing notion is a single ring set up is far more durable.
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