420 ml 15wt is standard for WR, 450 ml 15wt is standard for CR, for the 40ml drum brake forks. I prefer to slow them down a tad & use 20wt oil with emulators & modified damping rods. About 10 psi of air for each leg (the race handbook says max 8psi though), & find that the forks tend to leak oil fairly regularly if you run them without air.
Cheers,
K