Honda-SOHC

Sorry to return to this but still having problems!
I watched the videos mentioned and even carefully read the Vintage Biker piece on setting up the carbs- no joy still won't idle.
I've tried BryanJ's revised carb set up still no joy.
It just won't return to idle speed of 1200rpm. rev it to 2000rpm and won't drop, rev it to 300rpm drops to 2000, rev it to 4000 drops to 3000rpm. I've disconnected cables and it still won't drop, so can't be cables! and revved by hand.
I've adjusted air mixture screws to 1 1/2 turns out and nothing.
But again, press the top of the brass nuts on top of the sliders and you can get the revs to drop but then drops too low and stalls. it can be reduced by adjusting idle screw but continually doing that is not right, obviously!
Is it possible I've reassembled wrongly the sliders but they to be smooth enough in their action?
Is it possible to get the main spring the wrong way round but don't see how, it closes the carbs with a quick action?
Frustrated of Sussex

No, this first time off since I've had bike, only did it as waiting for rebore etc. And thought ideal time , any ideas Ted?

Try disconnecting the cables completely. Rev the engine using the butterfly by hand and see if it still does it. You'll need a remote fuel supply to do it though.

You don't like me do you 🤣
Worth a punt though. Given up Haynes manual (sorry Bryan) reference to 56mm distance on closing throttle to end .

I'll double check but everything seems to open/  close OK but you never know bit fiddly at that bit .

The saga continues. I've refitted carbs after setting sliders using BrianJ's method, and others and seemed to achieve what was required.  Bike starts fine and when warm ease off choke and all ok. But when revved up to say 3000rpm the throttles close properly on handlebars, but revs do not drop back to tickover 1200rpm. This can be achieved by using main idle screw, but when revved again the same happens meaning using idle screw again - could make for interesting riding! When revved higher say 4000rpm still won't drop back past 2000 without using idle screw.
I have fitted main air box to back of carbs but not yet connected up to filter box (suspected I'd be taking them off again!) and air filter not fitted but this shouldn't make any difference at this stage I believe. Carbs have been stripped/cleaned and replaced brass float rods and carb float height set.
Any ideas? Anyone? Please !

Okay so carbs off ..again! To attempt bench sync a la Bryanj method, what could be easier 🤔.  So found lowest slider and adjusted gap for drill bit, using 1.5mm bit. But when trying to use separate adjusters for other carbs there is no further adjustment available to achieve same gap?  Have I missed something when reassembled carbs after cleaning?

I agree with Oddjob, before diving in deep with all the strip down malarky, look at the simp-le stuff first. The push pull cables do take a couple of minutes to set up, plus check that they are routed correctly especially round the headstock and right fork, and check engine reaction when turning the bars from lock to lock.

Good idea, with cables disconnected, sliders snap back closed easily but just can't get cable routing right. Don't suppose anyone has pic of routes for theirs - I've seen the diagram but to be honest it's not that clear. Do they run through headlight bracket or behind it, note to self ALWAYS take more pics of everything before you start!

Cheers Bryan and K2 -K6, I'll continue with the one purchased.Thanks