Brand New 12V CDI ignition coil:
Kawasaki Z 400 F (ZR400) B1 (1984).
Kawasaki Z 400 J1-J3 (1980-1983).
This ignition coil is made to exceed OEM standard and has been specifically designed to upgrade either of the original coils 21121-1106, 21121-1107, 21121-1010 or 21121-1011 on a Kawasaki Z400. It has 100mm mounting points centre to centre, with 2 connectors and 2 HT leads.
If you're having spark issues with your Z 400 then it's a no brainer to get some upgraded coils on your bike. As they're upgraded you'll no longer need to run a resistor in the system. We don't even sell the standard like for like replacement 2 ohm primary coil anymore as we know that you'll get a better spark by fitting these and bypassing the resistor.