Ok I give How can you set the the motor at the 650 RPM, I have a dewll/tack meter 12v . I can hook it up to a 12v battery,to operate it but where do i hook up the the green lead that goes to the coil to get RPMs. I have used the timming light to set the timming,with a 12v battery and hooking up to #1 plug wire. that works fine but the tach got me confused