Scuffs on Piston Skirt

69FBCuda said

My Kaw Triple 2 stroke lost the fuel oiler while going 80 down I95, pulling the clutch helped a bit but by the time I was down to 20mph the tire locked up. I let it set for 1/2 hr poured some oil in the plug holes and off I went. Pistons looked just like yours.

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Yep...it's Called "Galling" & funny you should mention the bike - back in the day when running in the new MX'ers or Fitting a New Piston to honed bore, we used to polish off high spots that started to Look like Galling or scoring & it a Map Factory race w/shop manual they even state & printed tear down after a heavier oil mix run in & "Wet sand the high spots down" (I'd already learnt this as a kid saving old Techumseh & B & S minibike eng pistons , if fact you be surprised how many prifessional "bush mechanics" can save an engine/piston by polishing out IF scoring/galling isn't to bad when replacements are know here to be had.
For the threaded I've just posted up 2 screenshots of rockautos Slant pistons avail (they have rings, gaskets, T/chain too for budget 1 stop shopping too)
IF your bores checkout OK & not cracked or needing bore job, get your current 5 pistons magnafluxed crack tested, check for any shrunk skirt & button it back up if as you say can head etc good.
You'll be disappointed if you lay out for full block record as your reringerr will go better.
Set of Gappless middle rings will make a difference added ( see totalseal) Giving away so speed secrets here.
Cheers Trev.
Piston c & p below...