mrriggs
XS650 Junkie
I was playing around with a Mitsubishi J120 ignition module that I pulled off of a Mazda MPV minivan and I think it's the BEST factory ignition module I've ever seen. It has a smart built-in dwell control and clamps primary current at 7 amps, just like a Ford TFI. It was originally triggered directly from the ECU but the input threshold is magnetic sensor friendly (only requires 2.2 volts to trigger it). The best part is that it is a tiny little box that is easily mounted and wired.
My cousin picked up a basket case XS650. It had a TCI rotor/stator/pickup and that was all he had. I brought over that ignition module, a battery and a dual output coil, hooked it up with some alligator clips, and the thing fired right up and ran strong. The voltage output of the TCI crank sensor is a perfect match for the J120 module. With a slow kick, you will get no spark. With a healthy kick, the crank sensor puts out enough voltage to trigger the module and make a spark. That means that you can hook the module directly to the "advanced" leg of the crank sensor and the engine will start reliably and run well.
My cousin picked up a basket case XS650. It had a TCI rotor/stator/pickup and that was all he had. I brought over that ignition module, a battery and a dual output coil, hooked it up with some alligator clips, and the thing fired right up and ran strong. The voltage output of the TCI crank sensor is a perfect match for the J120 module. With a slow kick, you will get no spark. With a healthy kick, the crank sensor puts out enough voltage to trigger the module and make a spark. That means that you can hook the module directly to the "advanced" leg of the crank sensor and the engine will start reliably and run well.