PHBN 17.5mm carburetor has a manual choke. The 17.5mm carb will easily increase the performance of your 50cc scooter or motorcycle. It will increase your acceleration and top speed. To complete the engine configuration and easily gain power, we recommend installing a Big Valve reed valve, as well as a Racing exhaust pipe and a variator. Brand new high quality. Therefore, it is applicable to all 50cc scooters or motorcycles with a pull-cord starter, such as Yamaha Jog-R, Aerox, Bw, MBK Booster, Nitro, Stunt, Mach-G, AM6, Derbi, TZR, XP6, Rieju, Beta... and in general, all vertical and horizontal types of Minarelli engines. Color: as shownMaterial: metal Package Contents:1 * Only the carburetor in the above package contents, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Please allow +/- 1-3cm error due to manual measurement.