Warm up the engine (float chamber must be filled with fuel).
Remove air filter (see section «Removal and installation of the air filter»).
Remove carburetor.
Substitute a beaker with a funnel under the carburetor.
Slowly open the throttle lever 10 times with the throttle control fully retracted.
Divide by 10 the fuel level reading on the scale on the beaker and compare the result with the given sign (see carburetor technical data table).
![](https://www.bmwman.ru/img/ser3/0570.jpg)
Adjust the amount of fuel injection with the adjusting nut -a-; «+» - increase; «-» - decrease.
Install carburetor.
Install air filter (see section «Removal and installation of the air filter»).
Check and, if necessary, adjust the idle speed and CO content.