This is the new Gizmomotors 34mm piston for the Zenoah 260 it has been completely Full modified on a CNC Machine. The top outside diameter has been relieved. A stock piston weighs approximately 29 grams these pistons weigh approximately 20 1/2 grams.
This piston will work in all engines with a 34mm bore including the Zenoah, Sikk/Cy, J&G/Rcmk and Quickdraw HT engines.