Saw a thread recently (will try to find it) where a guy from somewhere in SA said it was common thereabouts to use a Honda (IIRC) piston and rings. Same diameter, but slightly shorter, which lowered compression only slightly, but cleared the valves anyhow. He said these pistons were used in KLRs because they were readily available, and relatively cheap, compared to OEM stuff.
Search the forums; maybe you will find it before I do.
Edit: it's the Honda Dominator NX650 piston...check your thread in the "other" forum...there's a reply there that covers it.
"Chet from Chattanooga"
2009 KLR, blue
Last edited by clogan; 09-21-2014 at 10:10 PM.