It’s not about a special vehicle, it’s not about a special carburettor type, (definitely Keihin CVK), but only about the type of adjustment screw, no matter where it is located on the side of the carburettor. The engine start is always ok, whether at lower temperatures with Choke or at higher temperatures without Chole, but the idling is sometimes more unstable, or, the engine starts to run out after a few seconds; if it doesn’t run out, the void increases and stabilizes. If this adjustment screw is turned in, the idle speed must be increased via the adjustment screw provided for this purpose, otherwise the motor will run out immediately; if this adjustment screw is turned out, the idle setting can either remain like this, be lowered or also be increased; If the choke is pulled outside the pure cold start phase, the motor will run out immediately, while driving all The system has an SLS; would be conceivable that the SLS valve is over? (preventive a new one has been ordered). Yesterday with the subdued minus degrees the idle was stable.