Noisey Gear Box

[auzzyss]

Hi people... Are the busa's gearbox a naturaly noisey box on idle in neutral. My is making a rumbling sound on idle in neutral when the clutch basket is engaged. When i pull the clutch in.. the noise goes away. So im assuming that its in the gearbag.... somewhere.

I can even hear it stopped at the traffic lights in neutal with cars whizzing by..

Is there a faulty gearbox problem with the busa??