The 17.5mm carburetor is equipped with a manual choke. This 17.5mm carburetor is designed to fit 50cc scooters and motorcycles with a pull cord starter. It is compatible with models such as Jog-R, Aerox, Bw's, MBK Booster, Nitro, Stunt, Mach-G, AM6, Derbi, TZR, XP6, Rieju, Beta, and other vertical or horizontal Minarelli engines. It is a new high-quality replacement part designed to help improve engine performance. For optimal results, consider pairing it with compatible engine components. Name: Carburetor Type: Motorcycle Carburetor Item: PHBN-17.5mm PHVA17 Style 2-Stroke Carburetor Fit: For Jog-R, Aerox, Bw's, MBK Booster, Nitro, Stunt, Mach-G, AM6, Derbi, Minarelli Color: As Shown Material: Plastic + Metal Package Contents: 1 x Carburetor Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement may vary by +/- 1-3cm. Only the items listed are included.