Features: 1.Fitment: For PWK 42mm motorcycle carburetor is perfect replacement for 300cc?450cc Racing Scooter Dirt Bike. 2.Advantage: The carb can not only improve the combustion efficiency of gasoline and save fuel, but also effectively prolong the service life of the engine. 3.Strong Explosive Power: Produced in strict with the highest standards, reliable and durable, provide new power for your motorcycle and help achieve the best engine performance. 4.Metal Material Adopted: This 42mm carb is made of high quality metal material, durable, wear resistance, corrosion resistance, reliable and has long service life. 5.Easy Installation: The carburetor is easy to install, no need complicated tools and the size fits perfectly, you can easily replace the old or broken one. Specification: Item Type: Motorcycle Carburetor Outlet side inner diameter: Approx. 42mm / 1.7in Outlet Side Inner Diameter: Approx. 42mm / 1.7in Outlet Side Outer Diameter: Approx. 45.5mm / 1.8in Inlet Side Inner Diameter: Approx. 59mm / 2.3in Inlet Side Outer Diameter: Approx. 63mm / 2.5in Applicable: for 300cc-450cc Racing Scooter Dirt Bike