I removed the air lid cover and disconnected the grey wire this weekend, and noticed a whistling noise when riding. The noise gets louder as I increase throttle. I did not get a chance to put lid back to see if that was it. Anyone else have that noise? Also, pulled plug this weekend and looked like bike is running rich. I have stock jetting with exhaust uncorked, grey wire disconnected, lid off and yz throttle stop. I thought if anything I might be running a little lean due to the modifications. Any info would be greatly appreciated. The bike starts easy and runs well.