Dimensions
Top Bearing Set ID=26 mm OD=47 mm Width=15 mm (verified with caliper)
Bottom Bearing Set ID=30 mm OD=55 mm Width=17 mm
The lower bearing set I got from my mechanic didn't have the pressed race (cone), thus no caliper verification.
Bearings:
Top: Koyo SAC2647-1
Bottom: Koyo SAC3055-1
I am working on a cross reference for tapered bearings. All Balls is one.
BTW the Honda 1995 CBR600RR uses the exact same headset bearings.