Motorcycle journalist Tracy Hagen died at 12:40 a.m. this morning while undergoing a liver transplant at the Mayo Clinic in Rochester, Minnesota. Hagen, who lived in Edina, Minnesota, had been battling liver cancer for some time.

Hagen wrote for several motorcycle industry publications and websites, including Roadracing World & Motorcycle Technology, doing tech pieces and coverage of some races and events.

Hagen’s also worked in other industries as an engineer.

He is survived by his wife, Supaporn, and a daughter.

We will post more as information as it becomes available.