This Performance 26mm carburetor with manual choke lever is most commonly used for (but not limited to) 110cc to 160cc ATVs and dirt bikes. By volume this part is most commonly used for 125cc and 140cc dirt bikes / pit bikes and outperforms all other carburetors, stock or performance for these machines, whether top name brand or no-name. Increased acceleration, throttle response and a finely pre-tuned stock setting yield a performance that has yet to be rivalled in this industry. Also very commonly used for many models of golf carts and other models of Go karts / buggies and some scooters. This carb has a 26mm manifold opening, 40mm breather opening and 47mm center to center bolt mount.