Just out of interest, would all this advice still be valid on a 99 YZF400? My old man has one, and it plays similar games to this. Some "expert" has taken most of the electrical system apart and told us that the stator is the only thing that can be at fault. I had a try at fixing it myself, but I didn't have the special plug tool that comes with the bike, so I couldn't get the plug out. I took the cap off and tried a different plug in against the frame to check for a spark. It was fine. Sometimes it would start, others, no. I checked it one day, and it cracked up perfectly, so I went to get all my gear on while it was warming up. All of a sudden after about 2-3 mins of ticking over, it stopped dead. Wouldn't restart, not a thing. I recall when it went to the local bike shop for service and a new plug, it started fine at first and then refused. Anyhow, I have the plug tool now, the knowledge (thanks to you guys), and some more stuff to try! Cool! I have a 250 EXC KTM at the moment. I love the ease of the 2 stroke, but I'd switch back to a WR in a shot if I thought I could get the starting sorted. For my father's sake, is it possible to change the timing back to WR settings from YZ settings? What's involved? WIll it make it more dosile for him?