This is the ultimate Bolt-On Carb Kit for all of our 47cc Pocketbikes including the Cagllari Mini Bike, MX3, MTX, and RS-R. Of all performance upgrades this single kit will probably make the biggest difference in terms of throttle response and aggressive acceleration gains while being the easiest and most complete kit. Includes everything you need to ugprade from stock, but requires an air filter and two fuel lines (these can be stock, but we recommend our air filter kit).