Scooter Rocker Arm Assembly For GY6 49cc 50cc QMB139

Condition: Brand New

Note: Some engines use 64mm long valves and some use 69mm valves, you will need to find out the length of your valves before the purchase.

50mm across all mounting holes, please note this rocker arms assembly only works for 64mm valves, will NOT work for 69mm head