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I just pulled the cylinder head off my 02 KX125. It needs a top end, and I wanted to make sure it's stock bore before ordering anything. The only # on the piston is 0259C, and a google search comes up with nothing useful. I think I've been told that the cylinder will be stamped with a size if it's over-bore, but I'm not sure.
I have a set of digital calipers at work I can bring home tomorrow to measure the cap (or I could just bring the cap to work) but I'm not sure how accurate that will be, if it's been bored over just a touch. Any advice?
Thanks,
Dan