Grizld1, I have been doing this set-up using the battery only to make sure of the voltage.
The idle seems to be fine, if anything just a tad rich according to the plugs - it is the intermittent hanging throttle that I want to resolve. I have done the Carb Guide diaphragm test (workign fine on bioth 76/77 and 78/79 carbs.
On the bike at the moment are the 76/77 carbs. I will do the carb cleaner test to check for a possible leak at the shaft seal.
I have gone through systematically, but I take your point, and I will return to the beginning of the Carb Guide. Your help much appreciated.
Anlaf