i picked up the machine recently. v-force reed valves, pro circuit 304's, i believe the jetting is factory, carbs are supposedly larger, air box lid is cut. machine runs great when it wants to. im thinking of draining the fuel out and re mixing since another family member pre mixed oil for the machine and the oil content may be to high? i heard 32:1 is a good ratio? ill check out the plugs to see if they are black or not.