This 26mm carburetor with manual choke lever is most commonly used for (but not limited to) the Suzuki EN 125 series and similar clones. This carb is applicable for many big brand and Chinese/Taiwanese/Korean brands between the 50cc to 250cc range. Has a 26mm manifold opening and a 40mm breather opening.
Manifold: 26mm
Breather Inner Diameter: 40mm
Breather Outer Diameter: 45mm