i went to that Motegi museum in 2001 and 2004. they change the display bikes around, there was more Superbikes on display then. i remember downstairs near the entrance was an huge wall sized poster of Steve McQueen, plus the Elsinore and the Honda shirt he wore in the TV add. you can watch the mechanics working on different bikes through a large window in one of the workshops.
there's a floor for F1 and Indy cars, plus all the different touring cars and the Jap spec GT500 race cars. up until the late 1990's the museum was at the Suzuka circuit, there's still some bikes and cars there too.
i laughed when i saw that red plate#2 CR with the leading link front end again... what were they thinking?