Timing Chain Tensioner Qmb139

TIMING CHAIN TENSIONER QMB139 – fits -> See Vehicle Fitment Tab

Control chain tensioner rail for GY6 50cc motors 139QMB / QMA. This rail has its mounting position in the engine directly at the control chain tensioner and is mounted in the engine housing at the bottom with a screw.

In the case of porous or cracked rubber, this component should always be replaced in order to avoid damage to the motor.