2007 Yamaha Wolverine 450 idling issues

[AF_GUY]

I bought this atv this year and ran fine ever since this past weekend when I took it up to this ATV park in Tennessee, I started out on this trail and the Wolverine started to lose all power like it had bad gas. I went back down the hill and everything seemed to run ok when I made it to the top it started to get all sluggish again, we put this fuel additive and ran a lil better but would crap out here and there. Then after like 10 min it ran fine for like a good hour then went back to being sluggish, it idles fine and with partial idle but full throttle it loses all RPM's. I dumped the gas out and added new gas, sprayed carb cleaner down the throat...I'm thinking a stuck or dirty jet, anyone have any opinions?

[swampcat07]

If the main jet dosen't have anything in it I would also check for air leaks in your intake and the condition of the air filter.