Universal Parts QMB139 Non Emissions Head - 69mm Valves aluminum wheel Mechanic's Note: When installing an

Mechanic's Note: When installing an alloy throttle tube

Compatible Models (157QMJ / 152QMI large-frame GY6):

They measure approx

Setup Tip: This version is intended for engines that need to "scream" before moving

See SKU 0800-1038

Universal Parts QMB139 Non Emissions Head - 69mm Valves aluminum wheel Mechanic's Note: When installing anUniversal Parts Completely Assembled Non Emissions Style Cylinder Head with 69mm Valves for 50cc 4 stroke 139QMB engines. Specifications: Intake Port Diameter: 17mm Exhaust Port Diameter: 18mm Valve Length: 69mm Compatibility: 139QMB based 50cc 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA 2 YN139QMB JJ1P39QMB 139FMA 2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models 157QMJ based 125cc 150cc 169cc engines with