06 -08 How I fixed my fueling.

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by rossguzzi, May 19, 2013.

  1. rossguzzi

    rossguzzi 990 Adv.

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    I have a 06 and want to fix the fueling (snatchy Throttle) issue. I have read enough of the TuneEcu thread to hurt my brain !

    I thought there was room for a thread where owners that have fixed the issue could tell how it was done and how happy they are with the results.

    So I hope this helps others and myself to sort their bike.

    Please state what year bike, Country (some countries dont have all the smog junk) and anything else you think may be helpfull.

    Cheers.
    #1
  2. rossguzzi

    rossguzzi 990 Adv.

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    Well, I thought it was a good idea :1drink
    #2
  3. kaptinkaos

    kaptinkaos Just some nOOb

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    Hey man, I'm going through the process of trying to defeat the snatchiness too, lol! It's not really noticeable on the highway or around town, but it's a wrist killer on single track or in tight mud spots.

    2013 990 Baja - Canada (smogged up)
    FMF pipes
    Did a canisterectomy

    Broke it in to 1000kms, didn't help.

    Put on a G2 throttle cam (400) and it did help, a little. Still not gone though.

    I'm going to try the powertripps maps with TuneECU as soon as my cable arrives. Hopefully more success.

    Other plans include removal of SAS. Not planning to change air filter.
    #3
  4. DSM8

    DSM8 Where fun goes to die....

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    It should be noted the EFI systems change between the model years on the 990.

    1st gen are the 06-09
    2nd Gen are 2010 on

    The solution for the first gen might be different from the one for the second gen.

    Just my .02
    #4
  5. catalina38

    catalina38 Long timer

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    FWIW the canisterectomy and SAS removal are fixes for specific problems that mainly effect carbed bikes and were never an performance enhancing mod and don't have anything to do with the FI. There are things you can do to minimize these issues and depending on whether the bike an early FI 07/08 or later 09-13 the results will vary as the bikes are not the same.
    #5
  6. tacosupreme

    tacosupreme Been here awhile

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    I've got a US model 2012 and the powertripp map solved it for me. The bike is all stock except for FMF cans. It also returned very nice mileage to boot, (US 42 mpg).
    #6
  7. z-man99

    z-man99 Adventurer

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    '08 990s with Akro's, no canisterectomy, was a tuning mess when I bought it. Snatchy throttle, major hang-up at about 4500, bad gas mileage. I didn't fix that stuff, but this guy did: http://2wheeldynoworks.wordpress.com/about/

    Mileage is now 43ish when I take it easy. Jerky throttle is completely cured. Occasionally I still detect a minor hesitation in the mid range but I probably wouldn't even notice it if I didn't think about it. My favorite mod so far.
    #7
  8. Dagwood_55

    Dagwood_55 Long timer

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    A little here, a little there. Not gonna be one fix for all.

    Just a combination of a lot of little things, depending on the bike, that will sum total up to a decent fix that you'll be happy with.
    #8
  9. pman13

    pman13 Been here awhile

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    I bought a used 07 with 10k miles on the clock. It was snatchy as hell, but the previous owner had the Arko map. Here is what made it sing:
    -Stock Map
    -Removed Butterflies
    -G2 Throttle Tube (I think the 400 cam)

    I haven't taken it into slow off-road yet, but everywhere else is happy as a clam.
    #9
  10. Two Moto Kiwis

    Two Moto Kiwis Homeless Somewhere

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    Tune ECU will solve 99 % of it coupled with disabled the o2 sensors and the addition of a the 400 cam.

    Get the Tune ECU dongle and go for it.
    #10
  11. Gustavo.Ramos

    Gustavo.Ramos Long timer

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    don't get that O2 detail... my 08 model runs like crap with O2's off, turn them on and its almost perfect.
    #11
  12. Two Moto Kiwis

    Two Moto Kiwis Homeless Somewhere

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    Hmmm, thats an interesting one, when we disabled the o2s on my (2010) 990 SMR it made such a nice difference it as night and day.

    I then took out the second flies which made it worse so put them back in.

    I think DSM8's post is valid here by the sounds of it.

    What year is your bike Gustavo.Ramos ?
    #12
  13. bikyto

    bikyto Dans le doute...gaz!

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    1st gen is 06-08 in the US.

    I turned my o2 sensors off and it runs great. I did work on the mapping quite a bit. Unless you have access to a dyno with a professional, tuning the map with the 02 sensors on is impossible at certain rpms.

    So many variables....
    #13
  14. ElRod

    ElRod Been here awhile

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    +1
    #14
  15. Desperate

    Desperate Adventurer

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    I have an 07 with Arkos brought second hand with inserts out. Was quite snatchy, the first thing I found was putting the Arkos inserts back in and not doing 15 minute idle thing helped.

    The big thing though is that I just adjusted my valves, the inlets were tight and one exhaust. I adjusted the inlets to be a little bit loose somewhere between 0.15 and 0.175. Exhausts are in spec.

    This made the engine smoother overall and really helped the snatchy throttle it Israel almost not noticeable. It really makes a big difference.
    #15
  16. Gustavo.Ramos

    Gustavo.Ramos Long timer

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    2008

    Unfortunatly i don't have a decent dyno operator knowledgable enough to properly work (so many expensive words in a signel sentence) on my 990, so everything is done by me.
    so far i keep wht O2's on all the time and try minor changes on the fueling and see how it goes. Timeconsuming yes, but i'm learning quite a bit.
    #16
  17. Qwik

    Qwik Adrenaline Addict

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    What were the Butterflies that you installed? I remember them being of an interesting shape (More football shaped than round)
    #17
  18. rossguzzi

    rossguzzi 990 Adv.

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    Thanks for your input guys. I hope this thread can work in conjunction with the TuneEcu thread to help us get better running bikes.
    Cheers.
    #18
  19. Ale_Ray

    Ale_Ray n00b

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    Hey Rossiguzzi.
    I put the gpr header and akra map on mine and it sorted it pretty well.
    Also got an akra slip on. Similar to what pete640 has on his 950.
    You can have a go when we go for that ride
    #19
  20. rossguzzi

    rossguzzi 990 Adv.

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    This thread lives !

    I should update mine.

    06, Akra map/pipes, Throttle cam 400, adjusted throttle cables, valves in spec (1 inlet was a bit tight) butterflies removed.

    It runs very nice. Not perfect, but close. No poping on decel, just slight crackling. Slight jerk on initial throttle opening, tiny bit of surging at 4-5 k rpm. Almost indecernable.

    I want to put on a Uni prefilter I have laying around to see if that changes anything. Might replace butterflies to see if they change things too.

    Looking forward to a ride Ale-Ray.
    #20