1978 Honda CB400A (Hondamatic) fuel/air problem?
I am not a mechanic, but have reasonable mechanical ability, so am hoping to fix this problem myself if someone might be able to point me in the right direction. 2 years ago, we fully serviced (at a bike shop) my dad's hondamatic (cb400a), including carb rebuild, new plugs, etc., etc. This bike only has 600 original miles on it, so had sat for most of its life. I kept taking out every once in awhile after that, but then let it sit again. Fast forward to last week, and to get it running again, I cleaned the carbs thoroughly again and put all back the way it's supposed to be, (I think - referring to the Clymer manual), gave it new plugs and new gas, cleaned out the lines, new battery. I started it up, and it seems to idle fine, but only with the choke flaps closed, even when I've let it warm up idling that way for a while. As soon as I let the choke go, the bike dies. Similarly, if I try to give it any throttle at all, it dies. I attempted to adjust the throttle adjust screw, but all that did was give me the ability to allow the bike to idle without having the choke flaps closed. Again, in this situation, any throttle would kill it. I am guessing this is something simple, but I don't know where to start. Any help you can give is much appreciated. thanks.