Just recently I was reading CW(?) were they said even a Ninja or Busa only pressurize their airbox 1 or 2 percent.

Steelheart- '03 Speedmaster Black/Yellow The Hayabusa Killa 16" Shorties/140 mains/Airbox drilled Procom CDI "There is no cure for Celibacy. But we can treat the symptoms."