Hi everyone. This is my first post. I didn't even know I joined the forum back in 2011. I have bought an acewell gauge and in having a hard time hooking up the rpm wire to my 1978 cb550k. I've tried wrapping the wire around the spark plug wire and was not getting signal. I thought it was my bike so I tried it on a gs500e and still no signal. I tried it on a car and still no signal. My only option left is to connect it to the cdi. But I have no idea where the cdi is on this bike. Any info would really help.
