Complex sentence: Nakamoto continued to work with motorcycles, but moved to Honda F1 project in 2000 and gaining multiple promotions up until the year 2002 when he became the Race and Test Team Manager for Honda Racing Developments Ltd. (HRD).
Split into simpler sentences: Nakamoto continued to work with motorcycles, but moved to Honda F1 project in 2000. He gained multiple promotions up until 2002 when he became the race and test team manager for Honda Racing Developments Ltd. (HRD).