I have a 2004 yamaha kodiak 400 its been a decent quad until now.. after i give it more than about 1/3 throttle it does nothing. It just stays the same as if i was giving it the same amount of throttle. It only go's about 25mph when it used to go much faster.So I first thought carb prob's.. cleaned it spotless and even replaced the jets. Still doing it, throttle cable is fine.. I cant figure it out.. its gonna need new rings soon and If i cant fix the problem I dont know what im going to do.