113 129 427 E : CO adjustment screw for Volkswagen Beetle

The CO adjustment screw is a component of the Volkswagen Beetle fuel system, whose role is to adjust the richness of the air-fuel mixture at the carburettor level. On a classic vehicle, the good condition of this screw directly determines idle stability and the precision of engine settings. Its replacement with a new part allows you to restore original parameters and preserve the integrity of the carburettor as part of careful restoration. Paying attention to the condition of this small component contributes to the reliability and longevity of the Volkswagen Beetle.