The component with the lowest price in the CARBURETOR schematic is the Screw, With Washer.
twenty-four components are shown in this Yw100e 1999 4vpj Portugal 294vp-300s1 Carburetor exploded diagram.
Some items from this specific schematic: Plunger, Starter, Pin, Float, Carburetor Assy 1, Valve, Throttle 1.