82 Interstate spark question

[lacanars]

Here's the backround, I bought the bike a year ago with 78,000 miles on it, shortly after it started running rough, traced it down to a fouled spark plug on the #1 cyl. Replaced all the plugs with NGK's, now a year later and 6 to 7 thousand miles and it does it again, once again it was the #1 cyl. Is it coincidence or is there a reason it is the same cyl. that fouled the plug? Here is the best picture I could get of it. Looks black and it is wet from about a 25 mile ride to get home.

[IAAustin]

Possibly a weak spark not properly burning the air/fuel mix. How does the inside of the cyl.#1 wire look? Does it smell like gas or is it oil?

[lacanars]

The wire looks ok, just as the other 3, I know it is fuel on it due to it not firing for the 25 miles I rode it to get home. I held on the the 3 good plugs I pulled out last year, put one in and it fires right up and runs fine, I guess what I am wondering is why would #1 go bad both times? Is it the way the carbs work, would #1 possibly catch all the junk flushed out of the fuel system from the winter storage more than the others? Is a bad coil or wire causing that one to burn up faster than the others? Is there something elese that I should be looking at that this is an indication of, I don't want to have something go out or break down and find out I could have fixed it before knowing that the plug was telling me something was wrong and I just replaced the plugs and did not fix the problem.

[RBGERSON]

no carb issue for #1 so check cap, wire, connections on both, resistor inside the cap..some years have them I forget which earlier..for sure.

[IAAustin]

If it is not oil getting onto the plugs from blow-by preventing proper ignition it may be time to test coils..I can't really think of anything else. If you don't have access to a service manual do a search for coil test on the site, I see there are a few threads on the subject. Seems popular to put on a Dodge Neon coil for replacement. And of course this is all with assuming no carb issues. Keep us posted and good luck!