I had a helluva time starting my 2001 YZ426 over the weekend, and found that either: - the plug was fouled (probably not, it was only a month old) - the spark plug cap was not securely fastened I swapped out the plug, and when I pulled it off, it didn't seem like it was fully seated. When I was buttoning it back up, it seemed like the spark plug cap wire had to be 'just right' for it to seat down all the way, and I also noticed that the cap didn't snap on like it does on all of the other bikes I have owned, or the way it does on a car spark plug. It just seems like it pushes on, but doesn't really give any indication that it is all the way down except that you can't push it any farther. Is this by design, or should I feel more of a click or a snap when it connects? I'll have to keep a better eye on it.