KTM 950 Jetting Database

Discussion in 'Dakar champion (950/990)' started by Billroy, Jan 11, 2006.

  1. Bonnie & Clyde

    Bonnie & Clyde Wishing I was riding RTW

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    Ok I just bought an 07 super enduro with all the smog stuff gone and block off plates installed. It has dual fmf pipes and a sw7 dome ITG air filter. The bike was jetted for 1,200 feet. I bought the bike home to 5,000 feet. I haven't pulled the carbs yet to see what jets and needles I have but what are the jets the collective think i should have for the new elevation 5,000 feet?
  2. Ewan McBoorman

    Ewan McBoorman The voice of reason is annoying

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    @mousitsas it seems like you really understand these carbs. Could you offer an opinion on how you would jet mine? I have an 06 950 Adv at sea level, with a Rott Intake, stock exhaust, and all emissions deleted.

    I have both stock and FP needles, and several mains and pilots on my workbench.
  3. mousitsas

    mousitsas Long timer

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    You could try

    Floats 3.5mm
    FP Needles @2.5 (3rd slot without bottom washer)
    Mains 160 165
    Pilots 45
    Fuel screws half a turn out.

    It might not be perfect for your bike, but it will be close enough to only require minor adjustments here or there.
    Have a go with it and post your impressions.
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  4. Ewan McBoorman

    Ewan McBoorman The voice of reason is annoying

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    Thanks, I'll get those installed and hopefully can post back in a week (waiting on a balance shaft seal to arrive also).

    Thanks!
  5. opanos

    opanos Been here awhile

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  6. mousitsas

    mousitsas Long timer

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    I had another go with the itg these days and tried several settings.
    I prefer the stock needles over the fp, which is also something I had said in the past, but forgotten since.

    So, this is what i recommend.

    Floats 3-3.5
    Stock needles @2nd
    175 175 mains (wideband verified)
    42 pilots.

    Interestingly enough this is the first time i tried same mains front and back and it seems this is quite important for a smooth as well as a correct running.

    Also, the #175 corresponds to summer temperatures, for cold climates I would use #178
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  7. Ewan McBoorman

    Ewan McBoorman The voice of reason is annoying

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    Thanks, I will get those put in and hopefully can report back soon!
  8. darkstarmoto

    darkstarmoto Am I evil? Yes I am

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    Just reading thru this again and realized I never updated.

    Changes noted in Orange

    05.5 950Adv
    CPR domed intake, CJD 2:1 exhaust with Remus Rev Ti & silencer.
    SAS removed and Facet pump.

    42 pilots
    172/175 (previously 175/178 mains)
    NDFB stock needles, 2.5 position (flipped the washers)
    4.0mm float height set fully flipped (previously 3.75mm)
    stock air jets
    2 IMS
  9. COXR650L

    COXR650L Long timer

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    My set up for higher elevations, 4000-12000 ASL with stock cans, emissions crap removed and a prefilter:
    145/142 mains
    Needle 3rd clip (note it was running in the 2nd clip for a long time, and moving it to the 3rd gave it much better bottom end).
    42 pilot, 2 turns out.
    3mm floats
  10. Ewan McBoorman

    Ewan McBoorman The voice of reason is annoying

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    @mousitsas a couple days ago I got all your suggestions in place, and was able to go for a quick ride with one fuel tank mounted, no fairings, no seat, but it was great! Once I can get some more miles in, I will post back, but so far this setup is perfect. Thank you for your help!

    2006 950 Adventure
    Rottweiler Intake
    Stock Exhaust
    Emissions stuff removed
    Elevation: ~Sealevel

    Carb Settings per Mousitsas' suggestions:
    Stock Air Jets - (40 main, 80 Air Cut, 50 Idle Air)
    Floats - ~3.2mm
    Main Jets - Both 178 (cold temps, around 45F)
    Needle: Stock needle, 2nd clip
    Pilots - 42
    Idle Mixture Screws - 2.25 turns out

    It took full choke for a bit to get it going, but it idles really well, and has power through the rev range. I accidentally left the 45 Pilots in at first, and the idle was too rich, realized my mistake quickly and swapped them out. Also, previous owner had 70 Idle Air jets previously, and one of my problems was surging around 4K RPM, that seems to be gone with the new setup.
  11. mousitsas

    mousitsas Long timer

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    I am glad you liked it. Check out also removing the bottom washer from the needles to get to 1.5 position (needle @ 2nd clip) . Some bikes, climates and exhausts seem to like it!
  12. MadM

    MadM Dreamer Supporter

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    When you say summer temps, you think 35+ Celsius you get in Greece? I might be better off with 178 here in alps (500-1500m) then?
  13. mousitsas

    mousitsas Long timer

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    I think 175 mains would be more suitable for your elevation Madm.
    By summer I have in mind 20C+
    For close to sea level it seems that a good setting is something between 175 or 178 mains and 2nd or 1.5 clip.
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  14. MadM

    MadM Dreamer Supporter

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    Thanks a lot! Will get some ordered.

    One more thing, when you say 3-3,5mm float, that is measured with carbs upside down, not leand as usual FCR on EXC models, right?
  15. mousitsas

    mousitsas Long timer

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    No, measured the stock way. I dont quite understand why, but sometime ago @Zuber convinced me that upside down is the wrong way to measure floats.
    MadM and chainbreaker like this.
  16. Zuber

    Zuber Zoob Supporter

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    Upside down has a lot of variance, it compresses the spring too much. The specs are always with the float hanging and barely touching the needle. This is when the fuel is actually cut off.
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  17. MadM

    MadM Dreamer Supporter

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    Thanks both for the info!

    I should be able to do a first test ride with gerf plate and ITG filter in 2 weeks time with completely stock jetting and in the mean time I can order some new jets and needles.
    [​IMG]
  18. opanos

    opanos Been here awhile

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    Well, i think i have concluded to my final and maybe the best jetting that the stock needles can offer.

    Itg air filter
    Akra's with db killers

    Main jets: 178 on both cylinders
    Pilot jets: 42
    Acv jets : 60
    Remaining airjets: stock
    Needle position: 1.5 (second clip w/o washer)
    Ims screws: 1.25

    The bike runs strong everywhere, almost feels like it runs on a superduke engine :eek:
    I ve got easily 45mpg last week on mixed conditions (highway at steady speeds above 150kmh and fast backroad hooliganing)

    This jetting works at its best only if there is the necessary backpressure provided from the cans so use it if you use db killers, or maybe stock exhaust.

    Can't recommend it w/o db killers but i guess it would work just fine, maybe with needle @2 with the washer below
  19. COXR650L

    COXR650L Long timer

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    Is this problem related to fuel pressure or float height?

    When going down steep, rough, and or whooped out hills at idle (ie the bike bouncing up in the air, not just bumpy), it will load up really bad. Takes constant throttle input to keep it cleared out. Never has any other issues except in these specific instances.

    The floats are right st 3mm and it's running a faucet style pump with a pressure regulator set around 1.5 psi
  20. mousitsas

    mousitsas Long timer

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    Try leaner floats and/or lower pressure on the regulator. It is a common behaviour as far as I remember reading in advrider of rich floats.