[FLYONWALL]

I know I should have introed myself before post but I'm one of those frustrated do it yourselfers. And pardon if this seems long but in order to bring you to where I man now you should know how I got here.

I purchased this bike (89 Honda vfr400) about 2 months ago from a supposed "ex Honda Tech." Get the bike home (my first) it would run fine so it would seem after running it out of gas (sold with full tank) I noticed how much rust was in the tank. This led me to believe that surely some of that had to get into the carbs. So, I took off the tank did a proper cleaning and put some Kreem in the tank. Then I took off the carbs, a real pain being a V4. I took each carb apart one at the time. I first took apart the diaphragm and then the pistons, cleaned them and wiped them down. Reinstalled then took off the bowl removing the float and all the jets, check valve and seat cleaning the jets out and the gauze on the valve seats. Using Q-tips and steel wool on the bowls to remove the varnish. I reinstalled and it fired right up even without the choke, something it had never done. It revved nicely to redline and didn't notice any problems. But this is where it starts. I then took a water bottle and misted each header pipe at the head to make sure all cyl were firing. I sprayed the rear first 1 and 3, 3 would steam straight away yet 1 wouldn't. Then I went to the front 2 and 4. 4 would steam straight away and 2 would not. So this leads me to think I am not getting spark. So I pull the plugs on those two cyl and notice a strong spark (new plugs). I then reinstalled the plugs and hit the starter button. It fired up and ran just like before only I didn't put on the plug wires. It was / is running on two cyl. So, off came the carbs again. I didn't find any foreign debris this time they seemed to be clean. I reinstalled them and it fired right up again. Still though only on 4 and 3. I then for the sake of myself poured a touch of fuel down each carb throat of the two cyl that are giving me the problems. The revs went up each time. I then turned off the bike and pulled the plugs to see what the burn looked like. Surely rich which I would have thought.

I have pretty much exhausted all efforts I know to this point. I have purchased a new CDI and have noticed no change. I did this mostly because I could come up with nothing else. Money I know I didn't have to spend because I was/am getting spark to those cyl only they aren't firing. I am left to think this is a carb issue. What should I try?