Hey guys I live in southern Illinois and I have a white brothers e series slip on and the air box lid off with a white brothers power filter but i got a k&n on the way and i have the cam mod done. I have a 165 main 45 pilot and the gytr needle on the 4th position. Is it too rich or to lean or what? should i jump the main to a 168 or a 170? Also i am thinking about getting a 13 :1 piston, would I have to do some rejetting? and if so what should i go to. Thanks alot! by the way the plug looks ok, it is kinda darkish tan......Oh one more thing, my quad just started making a weird sound around the cylinder almost sounds like the piston is loose or something, i put a 162 main in it the other night to see if it would run better but i just left it in for a run then took it back out cause it made the plug white, you guys think i could've scalded the piston?