Ok, who's got an idea of what might be wrong. My mother in law, being the great lady that she is, decided to give me 2 4 wheelers that they have had since about '98. One is a yamaha timberwolf and the other is a yamaha grizzly 600. So I take them both in to get serviced. Carbs cleaned out, new spark plugs, batteries, new tires on one of them. This was about 6 months ago. Came home and put sea foam in the gas tank because I knew I wouldn't be riding them much until we got moved, etc.

The timber wolf runs fine but the grizzly is having some issues. It will start when I pull the choke and it will run for about 30 seconds or so only with the choke pulled out. It eventually just dies like it is running out of gas. It will only start once. If you let it sit for a couple of hours or overnight it will start again the same way and proceed to die again the same way. It is almost like fuel is getting in the line or something and when it is used up it just dies. Could the carbs be gummed up again? I have tried it with the fuel set to on, reserve and off thinking they may have put the little lever back on wrong or something like that but it doesn't matter. Just does the same thing. Anybody ever hear of something like this? Interested to hear thoughts.