Hi, Ive just bought myself a 03 WR450 and it has a wileyco exhaust, jetted to suit, airbox mods, throttle stop mod and thats all i can think of right now, Anyway today i disconnected the grey wire hoping to squeeze some more power out of it and i found really no difference at all, actually im not sure if it had more power when it was connected, she pulls back hard and wheelies under power in first, second and third but looses a bit of balls in fourth and fifth, and i was hoping to get enough power gain from the grey wire mod to make it wheelie under power in fourth and fifth. does this mod only apply to later model wr's? is it because the 03 model cdi dosent have the yz mapping in it at all? will an aftermarket cdi give me the fourth and fifth gear grunt that im after? Im thinking about reconnecting the grey wire tomorrow because i didnt notice any difference, by the way, im certain i disconnected the correct wire - theres only 1 grey wire. Thanks in Advance.