Zenoah 290 top end kit

This is the long-anticipated Zenoah 36mm 29cc bigbore kit for PUM engines!  This kit will fit Zenoah G231PUM/G260PUM engines, or any engine running the 4-bolt  Zenoah marine crankcase..  This includes the parts shown (piston, cylinder, ring, pin bearing, pin washers, piston pin, base gasket, c-clips, and gold-colored heatsink).This 36mm cylinder is for use with the standard 28mm crankshaft.  Zenoah part# 966748001