I had these parts installed by my local dealer, who does not have a dyno, so they jetted the carb to get the bike running properly, but were unable to tune it for any type of performance. A few months after having the parts installed, I decided I wanted to have the bike dyno'd and then tuned appropriately, so I took it to MPHOhio where it was tuned on their Dynojet Dyno.
Stock 2009 Ninja 250R Dyno Chart - click to enlarge
Shown above is a stock Ninja 250R dyno chart. This chart is not for my personal bike, but another 2009 Ninja 250R that the shop had just done a base dyno run on a few weeks prior to working on my bike. As you can see, the stock bike has a peak horsepower of around 25 (at around 10,000 rpm) and a peak torque of around 13.50 (at around 8500 rpm).
My 2009 Ninja 250R Dyno Chart - click to enlarge
Shown above is the dyno chart for my 2009 Ninja 250R with the Yoshimura TRC Slip-On, K&N High Flow Air Filter, and Dynojet Stage 2 Jet Kit mods. MPHOhio did a base run on the bike with the silencer/baffle I had installed in my Yoshimura TRC slip-on. I then had them remove the silencer/baffle before tuning the bike. They made a few carb changes and the bike ended up with a peak horsepower of 28.44 (at around 10,500 rpm) and peak torque of 15.02 (at around 7000 rpm). The bike runs great and seems to pull better down low than it did before. The powerband seems to be a little smother as well. I really like the end result. Overall, the modifications I had done to the bike added about 3.44 hp and just under 2 lb-ft of torque (compared to a stock Ninja 250R).
What I learned from this is how important it is to have your bike properly tuned on a dyno once you do any type of engine modifications like adding an exhaust, hi flow filter, and jetting your carb. I've read about many riders trying to do this stuff themselves and they end up with bikes that are not tuned to take advantage of the new modifications, and in some cases their bikes don't run as well as they did prior to the modifications. Without a doubt, the best way to do it is to have the bike dyno tuned by a qualified shop.
The other day I took the 250R out for one last ride before all the fall-colored leaves get knocked down by a big storm headed our way. Temperatures were in the low 70's and riding conditions were near perfect. The fall colors are just past peak and the scenery is awesome. Wonderful day for a ride on my 250R!
A few days ago the mighty Ninja 250R rolled over 3000 miles. I'm still lovin' this bike. Sure, it's not the fastest bike in a straight line, but it does everything else well. I love how lightweight the bike is and how well it handles when the road gets twisty. It's also a great looking bike and I seem to get lots of questions about it from people when I'm getting gas.... and people are always surprised it's just a 250.
My other bike is a 2009 Yamaha WR250X and I go back and forth on which bike is my favorite. The Ninja 250R is great for longer rides because of the larger fuel tank and more comfortable seat. I also like how smooth the engine is. My WR250X only has a 1.9 gallon fuel tank, so I tend to take it on shorter rides unless I feel like stopping for gas all the time. It's also great when the road conditions go a bit south. The WRX accelerates faster and is way more comfortable when the speeds get above 60mph. Either way, I love having two bikes.... I can pick whichever one I'm most in the mood for.