Some old ladies would say the sound with the air box removed is a bit much. I like nothing more than the sound of open carbs at full tilt! This is one of the reason I have resisted an HRC/ram style air box. Cool yes, but I'd miss the sound.

Open carbs save lives...
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Andre E. Benguerel
1996 Honda NSR250R
Daijiro Kato/Fortuna Replica #74

2000 Honda RS250R (NX5)
2008 Honda RS250R (NXA)
AFM Expert #430