2001 Bear Tracker 250, sometimes have to pull with another ATV to start
My dad has a 2001 Bear Tracker 250. Sometimes when he attempts to start it, it will turn over fast but not start -it will not be firing. He can then pull it with another ATV with it in 3rd gear and it will start every time. After this, it will normally start up fine for quite some time before it happens again. The local Yamaha service personnel said to just continue driving until it just won't start, then bring it in and maybe they can find he problem. I have to believe that this has happened to someone else somewhere. Help!