Disconnect connecting rod 2 (see photo).
Connect the device for synchronizing carburetors 13 0 500.
Synchronize the carburetors at a crankshaft speed of 900±50 rpm, adjusting the opening of the throttle valves with the mixture quantity adjusting screws 7.
Using adjusting screws 4 and 5 for the mixture quality (composition), achieve a CO content in the exhaust gases within 3-4%.
If the crankshaft speed has changed while adjusting the CO content, repeat the above operations until the desired engine idle speed and CO content values are obtained.
Adjust the length of connecting rod 2 using the knurled nut so that the idle speed of the crankshaft does not change after connecting the rod.