Yes I had read about the perils of pulling it apart.
I had previously done just that on some carbs from a R65 (just two Bing CV carbs) and had success. For me a significant trick was to leave the butterflies slightly loose and let the spring bring them back to fully closed before tightening the two screws holding the butterflies to the shaft.
But, while I wanted to do the same here, discretion prevailed.
The other thing (frowned on - so do it at your peril) was balancing the two carbs. With the bike idling, just pull one of the spark caps and count how many revolutions the bike can sustain before stalling. Then simply adjust the idle screws to match both sides up.
But I digress - the 4 throttle bodies on a K are quite different to the 2 carbs on a R series.
I can't got for the final balanced and smooth throttles yet, I have dismantled the bike and have just pulled the clutch today.
And a pleasant surprise - despite the bike being 33 years old and off the road for the past 8 years, the clutch plate was 5.20 (measured in three separate places). Given that the bike has 108, 000 kms on it, someone has had the clutch plate changed "recently".
Guy