I would check the plug wire resistors in those cylinders. Easy to do, just pull them out by unscrewing the inside of the plug cap...the innards should fall out. They're easy to check...if open you'll have no continuity through the resistor. If that's good, then go to the coil for each one and check where the plug wire enters, the cap may have worked loose. The #1 coil is on the front coil on the left under the tank...may have to lift the tank a bit to get at it. The #5 is the last one under the tank near the fuel control. The last thing I would have done is pulled the head.
I did check the resistors/coils last summer and they were good. Put new spark plugs in and same problem continues. After desmog, I sprayed starter fluid around tubes and blocks to see if it was still vacuum, nothing there. I staked the valves a few times after compression test to see if I could loosen any valve carbon, no change. Intake and exhaust orings replaced. Timing belts looked in good position before.
I feel like I am at the next last thing, removing the head. Having a goldwing mech look at the head / valves to see his thoughts this week. I am trying to be simple solution focused and nothing is working, hence the space of removing the head.
If valves / head are fine, I will try some of the stuck rings videos from youtube...but again this bike was in an unknown crash prior to previous owner having it. I don't know what repair was done, how long it sat, all I have is the damage on the highway bars to see it was dropped hard on the right side where I am having problems.
