Darrell,
You probably have bad components in your TCI. I had my unit off and resoldered the pin connections. After assembling the bike I had the same problem. I tore the bike apart again and took the TCI to an electronic repair shop. There they replace several components. Reinstalled again and it runs like a beast! You actually need to unsolder the pins to remove the TCI board. All the components are on the back side. Veiwing the components removed from my board, it was amazing it was runnning at all.
Your problem is definitely the TCI as the Tachometer is droping to zero.
Hope you get back on the road soon!