OK as a complete noob but fanatic about learning to tune my carbs I think I have it clear in my mind.
1) make sure the timing is correct (will buy a timing light this weekend). 8 degrees at 900rpm and 36 degrees at 4500 rpm(will need a friend to press throttle at a steady rpm or buy a speedo to see under the bonnet as I flash the light).
2) hook up a vacuum gauge to each carb and adjust idle speed screws to balance front and back. Increase weaker carb if I want to increase rpm idle a little.
note: I can't get hold of a carbtune here so I'm thinking of buying 2 meters like this to balance front and back carbs. Would this work instead of mercury type tubes?
what scale do I need on the gauge? What units should it measure up to?
3) Begin adjusting 1 mixture idle screw, screw anti-clockwise (richer), 1/4 turn (wait 5-10secs), if rpm increases continue turning until it falls, then back off 1/4 turn. If decreases then turn clockwise (weaker).
4) Re-adjust idle speed screw if rpm rises too much above 1000rpm and re-adjust mixture screw.
5) Complete steps 3-4 for each carb.
6) Measure carbs with air vacuum again to make sure they balance.
Does this sound right? As long as engine and seals are all in good shape.