I have a 2000 Wolverine, and it was running fine until one day on the trail, and it started to spit and sputter. I put on a fuel fillter, no help. Then I took the carb off, cleaned and checked adjusted (everything to the book), still no help. Then I took it to two Yamaha dealers. The first was no help. The Second is still trying to fix. Today I noticed in Dirt Wheels someone else is having the same problem. If this sounds like the same problem someone else if having I could use some help. The bike is all stock.