High quality replacement automatic choke for all 4-stroke Chinese carbs and many 2-stroke Kymco, Peugeot, Piaggio, Yamaha and MBK scooters with Gurtner or Dellorto carbs. Direct replacement for your old choke. Please compare your current component with the one in the picture as there are many types of chokes in use. In some cases with scooters with a Piaggio engine you may need to replace the connecting block. Dimensions: Mounting sleeve diameter: 20 mm Plunger diameter: 7 mm Plunger length: 11 mm Needle diameter: 2 mm Needle length: 9 mm