i BOUGHT THIS ONE A FEW YEARS AGO AND CAN'T FAULT IT, it's alot cheaper here than th emotorbike shops
I'm now looking at the Zena XX10 to attach to the big hole on the AT front disc. It's 46mm from the edge of the disc to the hole and the lock is 46mm from the inside edge to the pin. Not sure if its going to be too tight.I use a Zena disc lock, fits a treat and even has a built in alarm. If I rememember correctly it's the XN 15 model.