If your air screw was all the way in, the pilot circuit would not get any air. Try screwing the screws in slowly, counting the number of turns in until it softly seats, but do not tighten! Then, back the screws out about 1 1/2 turns. One way to check to see if you are getting fuel is pull the spark plugs after trying to start it..if they are wet you are getting fuel..you could also try starting the bike by spraying some carb cleaner into the inlets of your carburetors..if it fires, your problem is most likely fuel related. I would then pull and clean your carburetors throroughly.
I doubt the problem is "too rich". Leave the mixture screws alone for now. Mucking with them will complicate things...
First, how much voltage do you have at your coils. Have you measured it by turning on the key and putting a multimeter on the coils? You don't have to start the bike to do this.
Second, a bike likes to be rich when it is cold and that will make it EASIER to start. What starting procedure are you using? What jetting is in the bike and what type airfilter system is on there?
Also, check your compression as this info is needed to baseline the mechanical health of the bike. If valves are hanging open or rings are shot, the bike WILL be much harder to start... do this FIRST before trying other things.
Post edited by: wiredgeorge, at: 2005/10/24 09:38
wiredgeorge Motorcycle Carburetors
Mico TX www.wgcarbs.com
Too many bikes to list!