My wife has a 1980 440 LTD. I had to replace a slide diaphragm after she bought it to get it to run rite and it ran excellent until the other day when it started dieing in her at idle. I was riding my bike behind her and I noticed some black smoke commin from the pipe on the right hand cylinder. I checked and changed the slide diaphragm on the carb again. The two adjustment screws beside the slide cover don't seem to make any difference when adjusted. Also about the same time all this started she ran it almost outta gas on the reg fuel setting and had to switch it to reserve to get to a gas store to refuel. The bike seems to run pretty good while it's cold, but once it has time to get warm it starts the dieing and not running rite on the highway. Also I replaced the spark plugs. Still different help. Only way she can ride the bike is if she moves the choke lever up to almost half way. Then I see the gas smoke, a quick one-time only puff of blue smoke. I took the pod air filter off one carb and it had a little of what I believe was oil in the rubber mount. Far as I know it has not been referred and I am now in the process of making some restrictors to go over the pod filters to cut the air flow down. Any ideas?