74 Super Beetle wont idle

Almost always going to be a vacuum leak. (--BUT--The bugs are real sensitive to valve adjustment so make sure it's been done first.) Check all the vacuum hoses and make sure they're not rotting out or loose. Check to make sure any vacuum plugs are there also, they may have fallen off. Get a can of carburetor cleaner with the little red nozzle on it and spray a --little-- around the carb linkage, the hose connectors for the intake to carb body areas and down where the intake manifold and head meet, etc. Pause a few seconds in each area you check, your listening for the engine to speedup. Check for vacuum leaks first. Adjust the valves. Make sure the points have been adjusted recently. Check to make sure the plug wires are ok, and don't have any cracks or splits in the insulation that may be shorting out. Whens the last time the spark plugs have been checked or changed.