This custom made crankshaft for MZ ETZ 150 has a connecting rod from Suzuki RM250 with reduction in the head for 16mm piston pin.
The stroke was increased from 58 to 62 mm. The piston comes from #Piaggio Hexagon 180. The piston diameter is 65 mm (org. MZ ETZ 56 mm). All parts of the crank were made at Intr-Mot from raw material (except for carburizing). The crankshaft is calculated from scratch.