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mnomis484
10/30/2017 12:02pm
10/30/2017 12:02pm
Edited Date/Time
11/4/2017 1:36pm
I am currently in the process of rebuilding a buddys kx250f that he drowned in a pond 
Quite a bit of sand got sucked into the combustion chamber, but it obviously immediately died as it went under water. Looks like nothing was damaged, piston, valves, everything looks fine. Except that it has an athena cylinder on it, and the plating looks very weird. I cant even describe it so here are some pics:


I cant feel those marks with my fingernail, but also cant wash them away.
Anybody ever seen anything like that? Safe to use again or not?
Any input is much appreciated

Quite a bit of sand got sucked into the combustion chamber, but it obviously immediately died as it went under water. Looks like nothing was damaged, piston, valves, everything looks fine. Except that it has an athena cylinder on it, and the plating looks very weird. I cant even describe it so here are some pics:


I cant feel those marks with my fingernail, but also cant wash them away.
Anybody ever seen anything like that? Safe to use again or not?
Any input is much appreciated

Did you try to rehone it?
Edit: It looks like some sort of deformation for the plating cooling down dramatically maybe? I dunno, I'm no metallurgist.
The Shop
I've seen a similar issue but coating starting to chip from the top gasket surface downward. Also dealt with a BBK from them that was advertised as 12.7:1 compression. Did a fluid measurement and it came out to 10.9:1, if i remember correctly. I will never deal with that company again.
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