I am having all sorts of difficulty getting my 1971 low light Kombi to idle. I am hoping someone can offer some words of wisdom. Background Info & Specs – The vehicle Compliance Plate is dated 10/71. The Engine is a stock standard 1600 cc dual port (AD code). The valve clearance is set at 0.006” (engine cold). The Carburettor is a single Solex 34-PICT-3 (German) – Main Jet X127, Pilot jet g 55, Air Correction Jet 120z. All jets and fuel passages thoroughly cleaned. Electric cut-off & automatic choke seem to be working. Initial setting of the carburettor idle speed & the mixture screws are both 2-1/2 turns out from fully in. The throttle fast idle screw is in ½ a turn. The Distributor is a Bosch 0231 167 049 / VW 113 905 205 AJ (centrifugal & single vacuum advance), and the Condenser is a Bosch – VW 1 237 330 204. I am guessing these are original, but not sure. The points are new(ish). The gap is set at 0.016” and the dwell angle 47 deg – no pitting or discolouration evident. The Ignition Coil is a Bosch 12A 905 009B. Primary winding ~ 4 ohms - Secondary ~ 8k ohms. Possibly original, not sure. The Spark Plugs are Bosch W8AC with gap set at 0.024” – The plugs are new(ish) with small amount of soft black deposits that is easily cleaned off. The high tension spark plug leads are new. The crankshaft pulley has 2 markings on it. A dimple marking on the outer rim that I assume is TDC for #1 piston, and a single notch on the inner rim some ~ 7mm to the left of the dimple. This notch would be approximately 5 deg ATDC. (see attached photo). The static ignition timing was initially set at TDC (points opening at TDC dimple align with crankcase join). However I could not get the engine to idle at this timing. I needed to set the static timing a few degrees BTDC to get the motor to idle. I am finding seemingly conflicting published data on the recommended timing - from 5 deg ATDC to TDC to 7.5 deg BTDC. The Bentley Manual does not identify this engine combination. I suspect the specified idle timing should of 5 deg ATDS, and I guess this corresponds to the notch on the inner pulley rim. But I am unable to get the engine to idle at this setting. Questions Is my 1600cc duel port, AD code engine, with the Solex 34-PICT-3 carburettor, and 113 905 205 AJ distributor, a standard & acceptable combination for a 1971 manual T2 Bay Kombi ? What is the recommended target ignition timing for this combination? Is the crankcase pulley correctly marked for this combination? Any suggestions on trouble shooting the poor idling situation would be much appreciated.