Re-jetting a 08 ninja with a stage 3 from 07 ninja?
Ok, so i went to the dynojet.com website and looked at some of those kits...as im planning to prep my bike for the riding season next year, lol. Anyway, they have a STAGE 3 for the 2007 ninja 250, and only a stage 2 for the 2008 ninja 250. While reading many posts, most guys actually went with the 100 jet cuz thats the biggest one in the set for a 08-09 ninja, but....what if you used the kit for the older ninja..where they have a jet that goes as high as 114! Anyone thought about that, or perhaps tried it?? I have never rejetted anything, so im clueless of what the hell is going on, but i guess the bigger the number the more fuel goes into the engine producing richer mixture for more power?
Not exactly. What mods do you have planned? If your putting on a full system exhaust and thats it a stage 2 is more than adequate. You'd probably only need a dj size 96 if your not and a 98 or 100 if you do add a full system. Now if your adding a pod filter then you would need a 110 minimum. Theoretically a jet kit from the 2007 would fit a 2008 carb. They both run cvk30 carbs from keihin. The difference is the ignition system. This could mean that the jet needle from the 07 is different from the 08 model I would need to measure the needles to see if they are the same but I don't have an 07 needle to check.
I've noticed that most (if not all) bikes with carbs were jetted lean from the factory. Some more than others, but I'm assuming this is because of emissions. The Ninja 250 jets are lean from the factory, so I would think that upping the main jet to 100 would help it from being cold-blooded in the morning and help with acceleration.
Actually, the ninja 250's in europe have fuel injection. We're the only ones that didn't get it. Probably a cost issue. But still, a little upsetting.
nonetheless, playing with carbs is becoming a lost art. Ninja 250 jets are relatively simple things to change. Depending on your mechanical ability, of course...
What? Why do they get fuel injection on their ninja 250s and we don't? Is the cost really a factor? Well maybe if someone is determined to have fuel injection on their American ninja 250, they can find the set on ebay and try and install it.
And I'd say my mechanical ability is pretty basic. With a good, detailed set of instructions, I could probably figure out the jets on my 250r.
I would think when Kawasaki was designing a beginner bike like the Ninja 250, they were also thinking about their audience: poor college kids. Any extra dollar that could be saved was worth doing and so our Ninja's got carbs. That's a good point about converting a US ninja 250 to fuel injection. I'd imagine it wouldn't be terribly difficult. Might have to fuss with the electronics of the ECU and what not though.
It's really not worth it. Just look up how to adjust your carbs online. There are plenty of good links.