I would highly recommend not replacing the original regulator with a conventional "shunt" type replacement. I have been through 5 aftermarket stators with aftermarket regulators and would recommend you fit a Shindengen SH775 series type regulator if at all possible - see
www.kz1300.com/index.php/forum/welcome-n...r-with-1979-z1300-a1
for details. It might save a good deal of time and expense in failed stators and a more reliable A1. Later models introduced a more robust electrical system with positive stator cooling.
