My brother just bought a 2008 F 570 and it has about 80 miles on it. We rode from Houghton Lake into Harrison and once we got down there when I was riding the sled it sounded like it dropped a plug. We changed the plug and it fouled out the new one right away. We put a third plug in it and found that if you very slowly pressed the throttle that it would be ok. The second you hit the gas it fouls out the plug again. Same cylinder everytime. It will work it's way up too 60 if you take like 2 miles to get there but minute to start to give it too much thottle it fouls the plug again. When we pull the plug out it is completely wet and will not fire at all. Does anyone have any ideas of what the problem may be. The clutch side cylinder is fine and has not fouled one plug.

Thanks

Sounds as if the main jet might have fallen out of the nozzle(in the fuel bowl). Something is either out of adjustment in that carb or the compression is low in that cylinder. Take it back to the dealer and let them fix it, thats what warrenties are for. Good Luck. T

Thanks for the info we are hoping to be able to ride the rest of the weekend. But looks like we may be done.