Outside Distributing 03-0028-HP High Performance Carburetor with Electric Choke Compatible With: GY6 Style 4-Stroke Units TECH TIP: It is recommended to replace the original intake manifold and gaskets when servicing/replacing carburetor. Original manifolds have tendancy to crack and wear causing operating issues. High Performance 30/32mm Carburetor for 150cc and 250cc GY6 4-stroke QMJ157 QMI157 and 250cc scooters. This carburetor replaces the stock unit and will increase the overall performance of your 150/250cc scooter.