I don't know about WSBK but in CCS they won't be legal:
5.2.21 Supercharging is not allowed. Turbo charging is allowed only if the
original equipment system is used.
http://www.ccsracing.us/forms/2014/rules/2014%20asra-ccs%20rulebook.pdf
The Supersport World Championship rulebook doesn't handle forced induction. They probably update with air restriction if H2 comes into the mix.
http://www.motorsport-total.com/motorrad/superbike-reglement-2014.pdf