This 25mm carburetor with remote choke attachment is most commonly used for (but not limited to) 125cc to 250cc ATVs and dirt bikes. Also very commonly used for many models of golf carts and other models of Go karts / buggies and some scooters. This carb has a 25mm manifold opening, 35mm breather opening and 48mm center to center bolt mount. Approximate dimensions:
Manifold: 25mm
Breather: 35mm
Bolt Mount (centre to centre): 48mm