KDX 200 cylinder wear, what to do?

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Joined
Dec 8, 2011
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Bike
AJS (all models)
Hi

I have taken the top end off my kdx, and bought a new piston.
Examining the cylinder, it definitely has a ridge at the top, I can feel it easily (have cleaned all the carbon). I suspect it is wear.

The barrel is Nikasiled.
What do you Reckon I do?
1 ignore, put a new piston in and bolt it back together.
2 get a cast iron sleave
3 get it re nikasiled?

If I go the re-nikasil option, are there any recommendations where to do it? I live in Jhb.

Thanks
 

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