Cylinder Kit for GY6 150cc Version B

Cylinder kits ship complete with cylinder, 57mm piston, piston rings, piston pin, piston clips, and top end gasket set.  This kit fits 150cc models.   There are 2 versions of the GY6 150cc engine.  This kit is for version B engine.  PLEASE check measurements and specs BEFORE you order.  Gaskets & fins on jug are also a help in determining the version you have. DOES NOT fit Kazuma 150cc original head exact - off by 1/16" so gaskets do not line up exact on the Kazuma GY6 150cc engine.  The "A" engine has 54mm spacing, center-to-center, on the cylinder head stud holes.   The "B"  engine has 57mm spacing on the cylinder head stud holes. Cylinder kit description: Includes cylinder body [bore 57mm] Overall height excluding cylinder "lip":  69mm Head/Base gaskets NOT included Piston kit also included Piston Height:  38.5mm Piston Diameter: 57mm Piston Pin Length: 41.5mm Piston Pin Diameter:  15mm Bottom hole distance: 63mm Center hole distance: 57mm Top hole distance: 55mm Distance hole