Engine B3, B5
1 - traction; 2 - electric heating and bimetallic spring automatic cold start; 3 - fastening; 4 - traction; 5 - vacuum device with mount; 6 - upper part of the carburetor; 7 - float; 8 - float needle valve; 9 - vacuum piston; 10 - electromagnetic ventilation valve; 11 - pump nozzle and check valve; 12 - bolts; 13 - primary transition jet; 14 - accelerator pump; 15 - fuel shut-off valve; 16 - secondary membrane; 17 - Idle switch; 18 - throttle valve adjusting screw; 19 - bolt; 20 - main jet; 21 - cap; 22 - mixture composition adjustment screw; 23 - flange; 24 - Fast idle speed adjustment diaphragm and mounting