Hello, I have a 1985 K100RT that until yesterday ran very well. Not being one to leave well enough alone, I decided to install a new battery to face the long cold winter ahead. Naturally,after this procedure, she refuses to operate. The starter motor will rotate the engine without internal combustion, and I have verified ignition spark and fuel delivery, but there is no voltage present at the fuel injectors. The wiring harness connection at the FI ECU appears clean and robust. The spark plugs show normal deposits and are totally dry. I have'nt the foggiest idea how to procede from here! Any help appreciated.

Recheck everything you removed when you put the battery in. Chance are you left something disconnected.
Regards,
K-BIKE