Does anybody know how I can tell what brand and perhaps compression ratio my piston it? It is bored .020 over - I measured the bore and the top of the piston is stamped with 0.5. The only markings on it are "ART" and "22A" next to the wrist pin holes on opposite sides. There are no valve reliefs, but the top of the piston is domed a little. I searched for "art pistons" online and came up with a couple sites in Japan and Taiwan, but the listings I found didn't show a 66.5mm bore for this engine.

Is "ART" the OEM supplier for Suzuki pistons? Is it safe to assume this is probably a stock compression ratio piston?

I have a pic at the following link, but you can't see much detail.

http://webpages.charter.net/bearsamy/lt230.jpg

 

factory piston 22a is a stamping number found on a lot of factory parts, like the rod and such. Usually the aftermarket stuff has part numbers on top.

 

Thanks.