This is a downdraft carburetor. The primary chamber diameter is 35 mm, the secondary 45 mm. The throttle valves of the first and second chambers are mechanically controlled and are actuated sequentially.
1 - Distribution channel.; 2 - Idle speed throttle.; 3 - Idle speed cut-off valve; 4 - Air channel; 5 - Idle speed adjustment screw (circulation of the mixture); 6 - CO adjustment screw; 7 - Release of combustible mixture; 8 - Bypass hole; 9 - Idle tube; 10 - Idle jetf.
The carburetor consists of 3 main parts: cover, body and throttle part made of aluminum by die casting. The 1st chamber is 3 concentric funnels (ventures), which supply the engine with a fuel-air mixture at low and medium loads. At high acceleration and high speeds, the need for a fuel-air mixture is satisfied by connecting the second chamber. The second chamber also uses an air damper, which ensures a smooth transition to the second chamber.
Depending on the version, the carburetor is equipped with a starting automatic or a manual air damper. The starting automatic is controlled by a bimetallic spring, which is heated by a heating element. The float chamber with a float is located in the middle and has a solid float.
Since June 1982, the 1.3-litre engines have been fitted with a Varajet II type carburettor with a manual choke instead of the device dosing additional fuel at start-up.
The fuel filter is located in the fuel supply line of the float housing and is easily accessible for cleaning or replacement.
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