Last night I re-sync'd my carbs using the lashed up vacuum gauges as described on this board. It took me 2 weeks however to find somewhere that sold connectors for 5mm vinyl tubing.
Once I had all the stuff, it only took me an hour to lash up a back board on a plinth and tie the four separate pieces of tube to it with cable ties. I used windscreen washer fluid due to its nice "blue" color, and closeness to the density of water.
It then only took me a few minutes to get the fuel tank off and sit it sideways across the top of the air box. and a further hour to fine tune the vacuum levels. To start with there was a difference of approx 20cm between highest and lowest. This is now down to less than 1cm.
She now purrs.........
Now the worrying bit. When I had the bike running from cold with the fuel tank off, I noticed some arcing on the outside of the ignition coil (right side). This stopped when the engine warmed up a bit (20-30 seconds). Is this to be expected? If not, why is it happening?