Just learned what a ETC switch was the hard way. My magnum just wouldn't idle so in my mine it had a carburetor problem. After taking the bike all apart to get to the carburetor and not finding anything, I discovered that as soon as I took my finger off the throttle it would quit running. So I took the throttle cover off and seen a set of electrical points. I looked in the service manual and its called a ETC switch. A very simple cable adjustment.