Good news, and bad news. It was a bad spark plug. That's the good news. Bad news is, I always look for the more complex issue, first. Truly, I would have much more believed that a fuse was burned or the CDI was bad, before suspecting a plug. I know that the plug was good- I had put it in the last time I serviced it. But, after checking the fusible link, fuses, and other suspects, I pulled the plug, checked it for spark, then tried another plug. Yep, plenty of juice. Stuck it in, and fired it up.
On a side note, there was another ATV at Helen's to look at. Another widow from our church had been considering selling her husband's Kawasaki (Bayou 400 4x4). Her two daughters were in our youth group over the years, and the younger of the two (now in college to be a pharmacist) was upset that her mom wanted to sell it. Helen talked Evelyn to store it at her place, so that Alex could come ride it when home from college. But, it wasn't running- it had been setting for 3 years. Helen told Evelyn that I would look at it while working on her Honda.
Whoever had been trying to start it didn't understand the fuel selector, and had it on reserve. I think that they had used the bike until it ran out of fuel, them garaged it. So, it fired right up once it could get gas. After running it around a little to warm it up and look for any other issues, I found that the front calipers are seizing (or, the master isn't allowing the fluid to return). So, I'll troubleshoot that.
But, after running the bayou around for about 10 minutes (before the front brakes tightened up), and then jumping on the Foreman, it was interesting to compare the two. While the bayou is newer, it isn't as refined as the Foreman. From the power band to the transmission, the Foreman is a lot nicer machine. And, the 350 Honda will smoke the 400 Kawasaki. No question which one i prefer.
I love that 350D, and enjoy getting to work on it.