Carburetor Carb for KTM50 KTM 50SX 50CC 19MM Junior Dirt Bike 2001-2008 Manifold Outlet Diameter: 19/24mm (Inside/Outside) Air Filter Outlet Diameter: 28/33mm (Inside/Outside) to be used on 2001-2008 KTM Pro Junior/senior, 50sx, mini adventure bike or replica bikes