1. Remove the carburetor from the engine.
2. Clamp the carburetor in a vice so that the idle mixture adjustment screw (MAS) was at the top.
3. By drilling a hole with a diameter of 2 mm in the casting surrounding the screw for adjusting the quality of the mixture on the x / move (MAS). Then drill the same hole again with a 3mm drill bit.
5. Install the carburetor to the engine.
6. Let the engine run at a higher speed than idling until the coolant temperature reaches 80-95°C.
Adjustment Conditions:
Lighting, electric fan of the cooling system and all consumers are off, the gear lever is in the neutral position.
7. Let the car drive for 5 minutes at a speed of 48 km / h or let the engine run at a speed of 2000 to 3000 rpm for more than 5 seconds.
8. Let the engine run at idle speed for 2 minutes.
9. Set the level of CO content when the engine is running at idle to the value specified in the specification using the speed / stroke adjustment screw (SAS-1) and a screw for adjusting the quality of the mixture on the x / move (MAS).
10. Replace the plug to secure the idle mixture adjustment screw.