Dynojet Kit 2393 Stage 3 (anyone try it?)

[mikecronis]

Looks like the Stage 2 by Dynojet stops at a size of "100" where the Stage 3 skips on over to "104". Too bad there's not a "102" size (as I'm in Colorado). I noticed DynoJet doesn't offer a pilot jet, just a main-jet whereas Factory Pro offers both. Wouldn't you want to fine-tune your carb jetting with both?

I've used DynoJet before in earlier model Ninjettes to good success, but Factory Pro's website looks 1990-esque. Recommendations? I have a nicely modded '08 (braided brakes, etc.) but intend on getting a full Yoshi exhaust (the carbon and titanium versions claim the same weight so I think it's a matter of aesthetics). De-snorkl'ed (runs odd now, and louder, probably a tad lean I suspect with a few micro-hesitations under WOT above 9k) and K&N'ed (not "podded").

So, do I need the pilot jet as supplied by Factory Pro or should I go Stage 3 on DynoJet (2393) or go large on the Stage 2 (2193)?

Also, finally, why not just buy a pilot jet and main jet from Kawi directly and save $$$? I did that with my Honda Superhawk 996. What would a DynoJet 102 size be in Kawi OEM speak and a pilot jet size of 42? For a main jet, don't I need two of 'em?

Mike

[cuz]

Never bought a dynojet. Bought the jets separately yea way cheaper you just need to know YOUR set up.
Yes you need 2 main jets and 2 pilot jets for the 2 carbs
TUNE INFO:http://www.ninjette.org/forums/showthread.php?t=10208

JetsRus:http://www.jetsrus.com/a_jet_kit_str...50R_Ninja.html

[mikecronis]

Hey, thanks for the JetsRUs site! GREAT!

[Racer x]

Go to a # 40 pilot

[mfresh]

I too have been trying to do some research on the Dynojet Stage 3 (2393) for the Ninja 250R and literally nothing shows up of interest on google except for this thread that was made yesterday.

Looks like most people opt to buy the jets individually these days? Any reason one shouldn't go for the "OEM equivalent" vs the "genuine" jets?

[DaBlue1]

Originally Posted by mikecronis

.... I have a nicely modded '08 (braided brakes, etc.) but intend on getting a full Yoshi exhaust (the carbon and titanium versions claim the same weight so I think it's a matter of aesthetics). De-snorkl'ed (runs odd now, and louder, probably a tad lean I suspect with a few micro-hesitations under WOT above 9k) and K&N'ed (not "podded").

So, do I need the pilot jet as supplied by Factory Pro or should I go Stage 3 on DynoJet (2393) or go large on the Stage 2 (2193)?

Are you jetting this bike for the elevation in Colorado Springs?
It sound like you may be running a little rich. Stock 250 Ninjas are nicely rich at 9k (see this dyno chart). Going to bigger mains and pilot jets for that elevation (6,035 feet ASL) will make it even richer. Normally there is a reduction in jet size. I see you plan on getting a full exhaust, but do you plan on leaving the airbox or putting on pods?

[Racer x]

Good call Blue. Forget what I said about the pilot above 5000 feet.

For the record I only use Keihn jets. I use tools to measure jets.Dyno jet jets work but don't come in as many sizes. And Dynojet does not have all the needles and pilots you need to fine tune.

[mikecronis]

After the snorkel removal, I'm getting indications that I'm overly lean at about 6-7k rpm and again around 10.5-11.5k. By adding a Yoshimura CF full pipe, I think I need to go up a size. I've owned pre-gens before and not jetting at this altitude with full-exhausts before and it was okay but a little too lean even still.

There's a guy Tony Strong who wrote-up a bit saying he found here in C.Springs he was successful only finally with using a Factory Pro pilot jet of 42 and a main jet of 102 after installing a full Yoshi setup with 2 shims on the needle. I did a little math and I suspect that's about right with a de-snorkeling and a K&N (non-pod, non-airbox-removal variety).

Racer X is an old sage from this, however, and I'm apt to take his advice on the 40 pilot instead of the 42.

[DaBlue1]

Originally Posted by mikecronis

After the snorkel removal, I'm getting indications that I'm overly lean at about 6-7k rpm and again around 10.5-11.5k. By adding a Yoshimura CF full pipe, I think I need to go up a size. I've owned pre-gens before and not jetting at this altitude with full-exhausts before and it was okay but a little too lean even still.

There's a guy Tony Strong who wrote-up a bit saying he found here in C.Springs he was successful only finally with using a Factory Pro pilot jet of 42 and a main jet of 102 after installing a full Yoshi setup with 2 shims on the needle. I did a little math and I suspect that's about right with a de-snorkeling and a K&N (non-pod, non-airbox-removal variety).

Racer X is an old sage from this, however, and I'm apt to take his advice on the 40 pilot instead of the 42.

After the snorkel removal, did you shim?
Did Tony Strong have a dyno read out to verify his A/F Ratio?
Kogary who lives in Denver, CO, put a wide band O2 sensor on his stock bike and got some interesting results. This thread may help in your jetting efforts. http://www.ninjette.org/forums/showthread.php?t=67530

[mikecronis]

Nope, didn't shim. Probably needed to. Got some jets on the way though, and I'm pouncing on a Yoshi Full CF once my Superhawk 996 sells.

[DaBlue1]

Originally Posted by mikecronis

Nope, didn't shim. Probably needed to.

That will definitely help, especially from 1/4 - 3/4 throttle. You may want to consider using a correction factor when jetting for your Altitude, Humidity, and Air Temperature.