Reader’s Rides: 1999 Honda VTR1000F Firestorm – Part 1

The OEM airbox bottom on the left, the modded version on the right. As you can clearly tell, the airbox was emptied of all internal plumbing (ie. crankcase venting tubes and chamber), increasing its effective volume. It was also expanded where possible (via the removal of the venting tube mounts and a re-shaping/expansion of the cavity in the upper right corner). Finally, a 10 mm spacer was added to lift the lid, the end result of the combined efforts being an approximate 1.5 L effective gain.