So here is the deal. Took my 91 VN750 on its first ride of any distance since getting it home and getting it "road ready" and I wanted to ask you all to help me identify some issues.
1) The rear cylinder left side spark plug can be seen sparking from between the "nut" portion and what I think is ceramic part going back to the wire. It is a brand new NGK Iridium I put in with anti-seize at 12 ft/lb. Is it defective or perhaps cracked from installation?
2) After a 30 minutes / 20 mile ride in the dark, I was able to see the portion of the rear / left exhaust header (immediately off the cylinder) that is behind the chrome cover was red hot.
Is this normal? When cold this pipe is totally black, I assumed that perhaps this is normal and that is why the cover is chrome, but I am no expert so I thought I would ask some, (you guys)
3) I am only partially through my first full tank of gas, which I did put seafoam in, approximately 1/4 can for full tank, and I am not sure if this is enough to clean the carbs, or if the carbs are actually the culprit for my "over idling." I don't think it is actually over idling because the RPMs take some time (2-5 seconds) to come back down to ~2000 rpm once I roll off the throttle when at speed, but they usually do come back down to ~2000. What I noticed today is that when I got home and put the bike in neutral so I could inspect the sparking plug, the RPM were stuck at 4000 for about 15 seconds at which time I noticed the red hot pipe so I turned the engine off. I waited 5 minutes then started her up and the idle was at 3000, still a little high, but better. I should note that it does not usually run this high when starting cold and after warming it up. Also I noticed that it took about 20 minutes of riding for it to fully warm up. I don't think that is an issue but thought I would mention it.
Ok, so that is a lot so I will end here and anxiously await some advise.
Thanks in advance