Ok, I just took my sled in again and I was wondering if anyone else has had that many problems with the F5. I will start at the beginning and go to today. The first day I brought the sled home we got some snow. I took it out and thought I would try it out. I would hit the gas, it would go for a second and then start to only run on one cylinder. That started things off pretty well, so I brought the sled back to the dealer. I found out that the fuel line was being pinched off and one cylinder wasnt getting any fuel. So that was fixed and we didnt have any snow for a couple weeks. The next time I went out the sled ran ok for a while. After about 20 miles the sled started to loose power big time, so I shut it off. When I did this the sled caught on fire. My brother and I hurried to throw snow on it to put it out. Not quite sure what caused this, and it didnt do it again. I figured it would be a good time to take the sled back for the updates. So all the updates were completed and I brought it home. They said they couldnt figure out why it caught on fire. I got a couple days of riding in, and the sled went pretty good. I stopped in a field to take a break, went to start the sled and the wind up for the cord broke. Had to be towed back, but luckily it wasnt very far from home. I took it back for that to be fixed. I brought it home again, rode that night, things went well. I took the sled back out in the morning and the thing lost power and would only hit 7000 rpms. I took it back to find out that the Power Valve wasnt opening, the cables were connected and all that. The servo was burnt out. By this time I was pretty upset and was about sick of the sled. Things went well for about two weeks, then while riding in some rough stuff, the rear suspension collapsed. I decided to fix that myself, the rear bolts had sheared off. It was another two weeks since that had happened and it was going ok. It didnt seem to go as good as it did earlier, but it wasnt too far down on power so I didnt care at this point. So today we were riding in the field and my brother got on. He came around a corner hit the gas and went to let off, but the throttle had stuck wide open, it was comming to a big bank in the field so he baled off the back. Luckily I just put a teather cord on the sled so when he came off, the sled shut down. He took a pretty good spill, but he is ok. So anyway, we couldnt get the sled started again, it was completely loaded with fuel. The throttle was suck to the bar. So we movd it back to the regular position. Took it to the dealer, and he was very suprised to see that the way it happend, the throttle override didnt work. It was just like if you were holding on to the gas. He went to see if the carbs were open or closed and the carbs are completely bound in the wide open position. I dont know what caused it yet, and really dont care. Arctic cat will be hearing from me for sure, and somthing will have to be done. Even the dealer says this is unacceptable. If it wasnt for the theather cord, the sled would have gone into the road and across into the trees. My brother is lucky he wasnt seriously hurt. All this has happend and my sled dosnt even have 600 miles on it yet. What does everyone think about that. Let me know if you have had any similar problems.