Zenoah Watercooled Stroker Crankshaft 29mm (+1mm)

Zenoah 29mm (+1mm) Crankshaft for Watercooled Engines Made by Zenoah in Japan When using on a Zenoah brand motor, no additional parts are required.  For use, requires a cylinder modified to accept the +1mm stroke, or use of an additional cylinder base gasket.