stalls

'79 CB750K. Idles rough at cold start. Previously I had to hold the throttle open for about 1 minute or it will die. Once it warms up a bit I can release the throttle and adjust the choke. The other day it cut out after about 1/2 a mile. I thought it might be flooded, so I waited a couple of...

'79 CB750K. Engine turns over, but I have to hold the throttle open to keep it from dying. I warm it up like this for a minute or so, but as soon as I release the throttle it dies. This started the other day when I was riding and all of sudden it cut out after about 1/2 mile. I thought maybe it...