Fresh honed cylinder eating rings

Cleats Onionpockets /
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Puch Korado cylinder, single L-ended piston ring. Got this one from overseas and gave it a fresh hone with a new set of flatstones, went medium speed with plenty of oil. It has a beautiful crosshatch, and feels smooth to the touch. I'm filing the ring gap so that it's just shy of touching when installed, and the bike will fire off just like it's supposed to. Mixing 50:1 with Motul. Within a few minutes of running at idle, it starts farting and stumbling, then refuses to hold an idle. When taken apart, the ring gap is now enormous, and all the compression is just chuffing past the ring through the gap. What gives? It seems like it's wearing down the rings super aggressively, to the point where the gap opens up. But it's the correct ring for the piston, and it starts out running perfectly. It's not snagging on a ring, no scratches visible in the ring after it's changed shape...it's almost as if it's being abraded down.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Fresh honed cylinder eating ringsTopic by: Cleats Onionpockets Cleats Onionpockets 08/09/19 05:09PM
  Re: Fresh honed cylinder eating ringsRe: live ɘvil live ɘvil 08/09/19 08:10PM
  Re: Fresh honed cylinder eating ringsRe: Rebel Moby Rebel Moby 08/10/19 09:56AM
  Re: Fresh honed cylinder eating ringsRe: Daniel '' Daniel '' 08/10/19 03:14PM
  Re: Fresh honed cylinder eating ringsRe: Jeff Parr Jeff Parr 08/10/19 03:53PM
  Re: Fresh honed cylinder eating ringsRe: Rob Healy Rob Healy 08/10/19 11:33PM
  Re: Fresh honed cylinder eating ringsRe: Marc Friedman Marc Friedman 08/12/19 05:12PM
  Re: Fresh honed cylinder eating ringsRe: Alex hernandez Alex hernandez 08/12/19 08:38PM
  Re: Fresh honed cylinder eating ringsRe: Cleats Onionpockets Cleats Onionpockets 08/13/19 10:54AM
  Re: Fresh honed cylinder eating ringsRe: Marc Friedman Marc Friedman 08/13/19 11:23AM
  Re: Fresh honed cylinder eating ringsRe: live ɘvil live ɘvil 08/13/19 11:55AM
  Re: Fresh honed cylinder eating ringsRe: Cleats Onionpockets Cleats Onionpockets 08/13/19 12:39PM
  Re: Fresh honed cylinder eating ringsRe: Marc Friedman Marc Friedman 08/13/19 12:44PM
  Re: Fresh honed cylinder eating ringsRe: Cleats Onionpockets Cleats Onionpockets 08/13/19 12:51PM
  Re: Fresh honed cylinder eating ringsRe: live ɘvil live ɘvil 08/13/19 01:48PM
  Re: Fresh honed cylinder eating ringsRe: Dirty30 Dillon Dirty30 Dillon 08/13/19 02:02PM
  Re: Fresh honed cylinder eating ringsRe: Marc Friedman Marc Friedman 08/13/19 02:33PM
  Re: Fresh honed cylinder eating ringsRe: Cleats Onionpockets Cleats Onionpockets 08/13/19 02:00PM
  Re: Fresh honed cylinder eating ringsRe: live ɘvil live ɘvil 08/13/19 03:14PM

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