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