Original Mikuni 25mm manual choke carburetor. Most commonly (though not exclusively) used for 125cc, 140cc, 150cc, 155cc, 160cc dirt bikes / pit bikes as well as common big brand models such as the XR50, CRF50, KLF110, KLX125 etc. Carburetor manifold opening measures approximately 25.5mm and thus is often used for both 25mm and 26mm applications.
Manifold Inner Diameter: 25.2mm
Breather Inner Diameter: 34.6mm
Breather Outer Diameter: 39.8mm
Bolt Mount (centre to centre): 48mm