Spoke to Kevin Howe at Zero today. I was wondering what the resonance modification actually was.

anyway, the modification was a perforated tube muffler pipe tacked in the outlet pipes, Ill try and get a decent picture of the mod over the weekend.

He reckons he only did about half a dozen modified sets before doing a complete redesign of the internals.


Ive spent a couple of hours in the 260 today, and am pleased with the Zeros, plenty noise without being overbearing.