Replacement igniter Box for XS650 TCI Systems We just passed the 40 year anniversary of the introduction of the XS650 TCI system. That’s a long time for a piece of electronics out in the weather . In my case I bought a motor that was a tci system. I had no box or anyplace to plug one into. So with my options were to search for a oem box that dates to to the Reagan years or search for a replacement. The TCI system is pretty simple. A magnet embedded in the rotor is sensed by a pickup coil, the oval black plastic in the upper right of the photo. The 650 pickup has 2 coils, one centered on the idle file mark and the other is in a more advanced position. The box determines which pickup by how fast the engine is turning. I have tried quite a few igniter boxes and was able to make sparks but could not get them to advance mirroring what many others here have found. Modern igniter boxes use a variety of ways to be triggered and several ways to firing the coil. What is needed is a box that will provide 20-25 degrees advance and can be triggered by the stock pickup.