LoneRonin
Well-known member
Poking around in search of a dyno chart. Seems that an Akra slip-on is a common thing to do. That will keep the stock header section and shouldn't affect how the bike runs too much. It'll need rejetting ... but Ninja 250 requires rejetting straight off the showroom floor with the stock exhaust (too lean down low), so no surprise there.
Not Akra but just to give an idea ... http://www.ninja250mods.com/ninja-250r-exhaust/
Will my shimmed needles with snorkel be good enough or does it need proper jetting? Buddy here has a used one for 450 but its 460 brand new and shipped from Petes...Bluestreak is saying 580.