Replace a cracked, collapsed, or missing crankcase ventilation hose on your GY6-powered scooter with this OEM-spec rubber breather tube. It connects the crankcase to the airbox or atmosphere, allowing crankcase pressure to vent properly and preventing oil contamination of the intake. Fits QMI152 and QMJ157 engine cases found across a wide range of 125cc and 150cc Chinese scooters.
