Atv running to rich. its a kvf 360 a8f kawasaki prairie 360 2008 ATV burns through plugs in an hour of use and carb is cleaned out the jets cant be adjusted wondering all possibilities..every one.?

Replace the jet needle and the needle jet . it is the one in the center of the carb .the hole in jet gets enlarged by all this crap gas they are forcing on us WHEN THE NEEDLE COMES DOWN IT IS SUPPOSED TO CUT OFF THE FUEL FLOW ,WITH A WORN JET IT ALLOWS TOO MUCH FUEL TO BYPASS THE NEEDLE FOWLING THE SPARKPLUGS .