Mornin' Cheese';
Could be that it wet sumped while it sat over the winter, and when you fired it up, it put a lot of oil out through the breather and into the air cleaner. That would foul a plug - not uncommon, and can scare the hell out of you what with all the smoke and mess until it scavenges the oil that's laying in the cases. We take out the timing plug, run a small plastic air line hooked up to the vacum pump down into the cases, and suck out the oil that is sitting in there before we fire it up in the spring. (The big bike doesn't wet sump, as the oil pan is below the pump, but on the softail, the tank is above, and when it sits for 3 or 4 months, some oil always seems to get past the check ball some how)
Might be talking out of my a$$ here, as your bike is a twin cam with a different oil pump than our evolutions have. Just a thought, and probably other guys here on this board who have seen it happen.
Glad to hear you finally got some weather - Been plenty warm enough to ride here, but the roads are still shining with salt dust even after all the rain we have had. Will not take them out in that, but about time to run them out of the house and back into the garage. Still need to change the oil in the 'King (going to switch it over to Mobile One), and need to bleed the front brake on the Springer. Besides that, we are SO ready.
All you guys have a good one - and ride safe;
D.B.