UPDATE: Ran like crap last night, really bad, and again this morning. Last night I ran the tank down to about 1/8, and then this morning I put 2 gallons in it (gas is ridiculously expensive in the city -- it's $.20 cheaper near work.) It coughed a couple more times, then ran great all the way into work (19 miles.)

I'm hoping it was the gas. This dual-quad tunnel ram setup apparently has no sense of humor.

Thanks again, Denny.

Oh, and FWIW, I do have a locking gas cap.