First off all, sorry for my bad spelling.
I recently bought a CB400, and she had some carb problems.
When she was cold with choke, idle was fine and god response, then with warm engine and choke off the idle would rise 2-3000 rpm and terrible response, if I gave her throttle fast she would stop. I really had to rev her high and then hit full throttle to get her going.
Then i bought Keyster carb kits, and did a carb rebuild. I noticed that the original slow jet was size 35, and the new one were size 40.
After a carb sync the idle was perfect

Then a new problem had appeared, she was now to rich at slow speed. With about 1/8 throttle and 2500-4500 rpm she was now 8 stroking. So i could only drive on the highway

Then i put the original 35 jets back in, and now the idle is rough. When i give her throttle now she have a dead spot on about 1/8 throttle and she is blubbering when i drive in 20-30 mph. But she is rideable.
I been driving like this for a while now with the air mixture screw 3 rounds out.
The bike have a new airfilter and stock air system.
I want to put the size 40 slow jets back in to get the smooth idle again and move the needle clip one notch up to lean out the low throttle?
Any other suggestions?
I love to ride this bike, bout i want her to behave