Cylinder Head Assembly - 54mm - 150cc ATVs - Version A 156377 Compatible with QMB139 50cc 4

Compatible with QMB139 50cc 4 stroke GY6 engines

Do you need your stator magneto fast

Center hole measurement: 29mm (1

1 in) on longer side

Cylinder Head Assembly - 54mm - 150cc ATVs - Version A 156377 Compatible with QMB139 50cc 4Chinese ATV Cylinder Head Assembly 54mm 150cc Version A There are 2 versions of the GY6 150cc engine. This kit is for version A engine. PLEASE check measurements and specs BEFORE you order. Complete cylinder head assembly with valves for 150cc 4 stroke engines. Fits many makes and models of GY6 150cc engines. Check pictures, specs and measurements for verification of the correct part. The A engine has 54mm spacing, center to center, on the cylinder