after sled sits, it fowls plugs. put new plugs in and ride it, it't fine until it sits a while again, then same thing over and over. anyHELP thanks paul

Is the fouling problem effecting all three plugs or just one ? If they all foul out I would guess the fuel pump is leaking back through the pulse line from the crank case to the fuel pump. Just pull the line off the pump and watch to see if fuel comes out of the pump . If it is only one plug getting fouled i would say it is in that carb. Like a sticking needle and seat. Let us know Good luck !!