Specdog
XS400 Addict
I suspect my TCI unit has failed. The symptom of no spark is on the right cylinder only. I've done all the tests I can think of on the other parts and they all show normal. Coils spec'd out OK but one was high but still sparks. Pick up coil normal. The failed spark follows the coil harness when you switch them. I've traced wires and they have continunity. The manual says at this point to change the TCI. Before I get another one I took the old one apart half expecting to see a burned out circuit. The unit looks perfect. Does anyone know of any definitive tests one can do?