Float mechanism. Wash the parts in acetone or gasoline. The float should not have any damage or distortion of shape.
The float weight should be 11–13 g. The sealing surfaces of the needle valve and its seat must not be damaged in a way that would compromise the valve's tightness. The valve must move freely in its seat, and its ball must move freely and not hang. Replace faulty parts with new ones.
Carburetor cover. Clean the cover and all holes and channels from dirt and oil. Wash the cover in gasoline or acetone and blow with compressed air. Inspect the sealing surfaces of the cover. If damage is found, replace the cover with a new one.
Starter. Clean all parts of the starter, wash with gasoline and blow with compressed air. Inspect the parts, replace damaged ones.
Jets and emulsion tubes. Clean the jets and emulsion tubes from dirt and resinous deposits. Wash them with acetone or gasoline and blow them with compressed air.
Carburetor housing. Clean the housing from dirt and oil. Wash the housing and its channels with gasoline or acetone and blow with compressed air. If necessary, clean the channels and emulsion wells with special reamers. Inspect the sealing surfaces of the housing; if they are damaged, replace the housing with a new one.
Accelerator pump. Clean the pump parts, rinse them and blow them with compressed air. Check the ease of movement of the ball in the valve screw 9 (see Fig. Carburetor body parts 2106-1107010) and the condition of the sealing surfaces and gaskets.
Check the ease of movement of the moving parts of the pump (lever, roller, diaphragm parts). No jamming is allowed. The diaphragm must be intact, without deformations. Replace damaged parts with new ones.
Pneumatic drive of the throttle valve of the second chamber. Clean the parts, wash and blow with compressed air. Check the condition of the diaphragm, it should not be damaged.
Throttle body and its parts. Clean the parts and wash them with gasoline or acetone. Inspect the parts, replace damaged ones.
Attention! Do not clean the jets with a metal tool or wire, or wipe the jets and other parts of the carburetor with cotton wool, cloth or rags, as the lint can clog the fuel-emulsion tract. In case of severe clogging, you can clean the jets with a soft wood needle soaked in acetone.