Pierburg 4A1 carburetor cover details:
32 - float; 33 - float axis; 34 - bracket; 35 - float chamber needle valve with clamp; 69 - Carburetor chamber cover gasket; 70 - carburetor cover; 71 - sealing gasket; 72 - plate; 73, 74c, 77, 83, 88, 89, 91 - cylindrical head screws; 74 - vacuum plunger assembly; 74a - pressure spring; 74b - cover; 75 - return spring; 76 - axis; 79 - main fuel jet of the 1st chamber; 80 - sprayer; 80a - return spring; 81 - connecting rod; 82 - vacuum shock absorber of the throttle valve of the 2nd chamber in assembly; 84 - vacuum hose; 85 - idle air jet; 86 - idle fuel jet.