The Carburetor assembly is constructed from several parts from which the Carburetor-assy is the most expensive.
Some items from this specific schematic: Tube,4x9x330, Screw, Tube,water, Washer,6.1x11x0.8,pol.
The Washer,6.1x11x0.8,pol is the most widely applied product in the ER500B4 ER5 2000 EUROPE FR FG CARBURETOR ( four times ).