Diaphragm and round 28mm Slide for some Walbro carburetors for Vespa, Piaggio and Aprilia Walbro Carburetor. The diameter of this slide is 28mm. The other one, CM140501, uses a 22mm diameter slide.
Please verify that the carburetor in your scooter uses this round slide before you order. Replaces 828741
Fits Walbro Carburetor for Vespa Piaggio and some Aprilia with 28mm Round slide.
For Carburetor marked Walbro only.