Probably Carb issue (long)
I have a new-to-me 1994 750 with 13K miles on it. I assume that means it spent a lot of time sitting. When I first got it, it ran ok but was very hard to start, even on mild California mornings. In addition the idle was not consistent. So I put new plugs in it (copper NGKs). You can set the idle at the stop sign but its going to be different the next time you stop. This is getting much worse, to the point that I have to set the idle at 3,000 RPM just to ensure it doesn't die if it decides to lower itself.
So today I was riding around and felt one cylinder stop firing (the tell-tale jerking). I pulled off and pulled each plug wire one-by-one. When I pulled the front wires, neither affected the idle. However, I was feeling the spark through my dearskin gloves. I grabbed an old plug and verified spark when connected to either plug wire against the cylinder. I then pulled the plugs out. They were wet but when I plugged them into the plug wire and held them against the cylinder after a field cleaning they did spark. In addition I could see the adjacent plug firing through the plug hole (it was dark).
I then started the bike up again. For some reason I have to use a flood start procedure to hot start it (fuel valve off, full throttle). I noticed that the exhaust front cylinder was not hot (of course), but when I gave it throttle it would "kick in" and the exhaust would get hot (after cleaning the plugs).
So, at this point, I don't think I have an ignition problem. I haven't tried a compression check but the exhaust pressure is similar enough that I don't see the compression being low enough to off-line a cylinder. It really feels as though the front carb just isn't idling (probably too rich is my guess). The other day I put Sea Foam in it and it had sat for about 48 hours when this happened. So I'm thinking I should do one of the following...
1) Let the carb sit longer with the Sea Foam and hope it clears something out.
2) Pull the carb and clean it on the bench.
3) Adjust the carbs (I really don't know much about this)
4) Assume I've been idling too much doing all this testing and take it out on the freeway (and risk breaking down on the side).
5) Something else.
I'm curious what the group thinks.