High performance cam for 139QMB engine. Use this camshaft when upgrading the cylinder and head to get the most performance from your new 72 or 82cc kit. 25.8mm intake lobe...
The 69mm rocker arm assembly is designed to replace the original rocker arms on GY6 50cc 139QMB and 139QMA engines. It ensures precise transmission of camshaft movement to the valves,...