At least not with a jet kit. Right. If you want raw horsepower, why the @#$! would you start with a bike that has 26 hp? Incidentally, your Ninja has less weight and has more power than mine (around 33 hp if I remember correctly).
So for those of you who don’t know (and sorry for those that do), when manufacturer’s claim “26 hp,” they’re referring to PEAK horsepower. That means that somewhere in the engine’s powerband it generates that much power at full throttle…if only for an instant. This is why you hear people with traditional I4 sportbikes complaining about “lack of midrange or low-end power” despite the astronomical horsepower figures. That full power is only available in the upper portion of the rev range.
A jet kit may not seem like much, but it actually makes a big difference to the street drive-ability of a Ninja 250 because it adds a lot more power in the midrange. You know how you were so sensitive about riding in the powerband? Well precisely what a Dynojet kit is designed to do is broaden that powerband and make more horsepower available throughout. Instead of being restricted to 6-10K rpm, my Ninja starts pulling just before 5K and keeps pulling hard up until 11-12K.
And for the record, when you have 26 hp, 1 hp IS a big deal, though chances are you’ll get more than that 
