Cylinder head VENANDI MOTORS M500 50cc for Simson KR51/1 Schwalbe, SR4 Star

With this special design, it is possible to replace older-generation engines (M53-M54) with newer-series engines (M531-M742). Without modifying the frame, the engine can be mounted to the cylinder head as before. This cylinder head has a combustion chamber diameter of 40mm. To use a 60cc cylinder or larger, the cylinder head must still be adapted.