Just adding bender silencers to stock pipes doesn't require a jet change.Only ear plugs are needed.There are jetting/clutching specs for bender quads in tech section.Thanks for the heads up Glenn. I,m sitting on the fence right now waiting for an answer regarding some pipes. I will be in the market for stingers for the 800. Anyone know what to safely jet an 800 for on Benders for todays crap fuel?...Rob.