i have a 1997 sx 700 with 4800 miles on it. it is runnin very very lean the plugs are white no color at all. i cleaned carbs almost 5 times every thing is spotless. when i bought sled it ran rough bogged at low rpm and ran lean. when i cleaned carbs it idles and runs great no bog its just plugs are bone white. i have tried br9es br8es and br7es. i put new fuel pump on it. i tried turning screw out on bottom of carb to 3 turns no change at all. only mod on sled is bender racing clutch kit and bender racing can witch was on it when i bought it. plz help i am hoping 2 go 2 michagan over christmas. thanks