Carb adjustment part 1: Mostly covers solex 30pict carbs but the 34pict (as fitted to our 1600 vans) is also covered. Carb adjustment part 2: Ignition timing, part 1: Ignition timing, part 2: Valve adjustment, part 1: Valve adjustment, part 2: https://www.youtube.com/watch?v=vQ9ccGXtZL0