Just an update...when we were first talking about the burned
 coils, and I mentioned that I had replaced mine, I also added
 that the check engine light had come on about a month before
 that, and, on checking it with my Harbor Freight OBDII reader,
 it was indicating the O2 sensor was bad.

 Another check last week also indicated that now the SSV
 (secondary shutter valve) was stuck open as well...an online
 check indicated that that is usually caused by carbon buildup and
 may need cleaning once in awhile (not easy to get to, but doable
 at home).

 Further searching provided a possible solution for both problems,
 by just running around at high RPM for awhile to burn off the
 carbon. So, two days ago, I ran around town in 2nd gear all day
 (6k-7k rpm) and then reset the codes when I got home.

 Since then (two days now) they haven't returned.

 So it looks like the two bad trailing coils that I found on my
 car were the cause of buildup on my O2 sensor which was burned
 off once I replaced the coils. I'd guess that running the engine
 hot a couple of days ago probably cleaned it and loosened up the SSV.

 Harley

Hmm Harley, possibly wouldn't have happened on good 2 stroke oil :(

John Evans