Motorcycle Repair: cables, ultra groundpounder, stock harley

Question
I am using a stock harley 22:40 speedo on my ultra groundpounder and need to order the cable but I am not sure if I have a 12mm or 16mm nut.  also, how do you measure for clutch cable, throttle etc. The speedo is black background, white numbers with orange needle, harley davidson in small orange letters at the bottom, reset knob on the right. thanks

Answer
You are going to have to take a measurement on the nut to be sure. I dont know what Ultra uses for a cable on there bikes. They make a 12mm, a 16mm fine and a 16mm course. You could check with the Ultra dealer to be sure.
As to the length, take a measurement of the cable cover and should do it.
Mike