High quality replacement automatic choke for all Chinese made 4-stroke carbs and many Kymco, Peugeot, Piaggio, Yamaha and MBK 2-stroke 50cc 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 different types of choke used. In some cases with Piaggio engined scooters you may need to replace the junction block. Dimensions: Mounting Sleeve Diameter: 20mm Plunger Diameter: 7mm Plunger Length: 11mm Needle Diameter: 2mm Needle Length: 9mm DOES NOT FIT WALBRO CARBURETORS