GL1200 Cylinders 1, 4 weak - pulling plug wires has no effect
I have owned and been riding this bike for over a year now. There were a lot of PO kludged things with it that I am slowly fixing as my limited time and $ allow. It has been running pretty well as far as I could tell, pulls easily up to 80 or 90 (no desire to go faster), starts up easily, no shaking or massive misfiring. I have had a feeling it may be a bit down on power (only wing I have ever ridden so no real frame of reference) and I know the carb sync is off.
I have noticed that adjusting the carb sync screw for #1 cylinder doesn't seem to do much at all. If it is backed out all the way the exhaust pipe stays mostly cold. If I screw it in, it warms up some but I see 0 difference in how the bike idles. I yanked the plug wire off and absolutely no change in how it idles. I'm definitely getting spark, the plug wire will arc to frame and I can hear it when I get it close to the plug. The carb bowl isn't dry, I get fuel dripping out when I unscrew the drain screw a bit. I assume I am getting at least some compression / ignition or the exhaust pipe wouldn't be getting hot.
The #4 cylinder doesn't seem to have the cold exhaust issue, but I can pull the plug wire from this one as well without any change so I know it isnt holding it's own either. If I pull the wire from 2 or 3 the bike dies.
I had replaced the plugs a few months back and don't remember noticing any difference in how it ran or any oddities in the coloring. I should probably give this another go.
I live in an apartment complex so I can't leave it partially torn down for several days at a time, and time/money/tools are at a minimum. I need some suggestions from you guys as to what I should do to continue troubleshooting and in what order. I don't want to just throw money at the thing because frankly I can't. Based on these symptoms, what should I logically do next? I am thinking at least new plugs and compression test? I am guessing a carb sync won't help until I can get all of the cylinders firing to the extent where I at least her a difference pulling plug wires?
Leaving this to the experts, I hope you guys can help me avoid just blindly taking stabs at things. Thanks!
1983 Vf750 Sabre
1987 GL1200 Goldwing Aspencade