The big KTM 990 SMT thread -- riders check in w/ photo!

Discussion in 'Road Warriors' started by Guy Jinbaiquerre, Feb 23, 2010.

  1. Eukol

    Eukol n00b

    Joined:
    Mar 6, 2013
    Oddometer:
    2
    Hi, I had the same trouble with my bike (Yam XTX660). Same deal, where some bikes were affected more than others (or riders' care levels?).

    It was explained to me that it is an issue of closed loop vs open loop fuel mapping by the ECU. 'Closed loop' is active on low-load, steady throttle openings, and 'open loop' comes into effect on hard acceleration and high load (freeway cruising/hills).

    Manufacturers manage to get through emissions testing mainly on closed loop - steady throttle and little loading (no hills or wind resistance - as it's sitting on a dyno). The result is that the closed loop map is leaned right off and the open loop can be much richer as it's (largely) avoided during emissions testing.

    The 'jerk' happens when you're negotiating car-parks, roundabout etc - because you're adjusting the throttle alot and the weight of the bike is 'falling' onto the chain/engine and then unweighting (unloading) the chain/engine - because you're in low gear, the engine/ECU feels this loading/unloading greatly (think about ratios and amount of engine braking) .... the net effect is: closed loop ... open loop ... closed loop ... open loop ... closed loop ... open loop (lean ... rich ...lean ... rich ...lean ... rich). A piggyback ECU (dynajet etc) won't get rid of this as they only effect the open loop mapping - unless of course you lean that off too (?!) but that will lean off the bike's performance.

    The 'fix' is richening up the closed loop. We (www.xt660.com) experimented with all sort of settings and adjustments. It was one member though who came up with most of the performance improvements - in the end Kevin came up with an electronic solution to rich up only the closed loop - which could be used with or without a dynejet etc. It was an amazing difference and I can now go around a roundabout very smoothly (lots of them in Australia). Dynajet eventually made a similar product for the XT660 - but at 2.5x the price. He supplied the units to us at a very fair price - all professionally enclosed and wired with the correct connections for the loom.

    When yamaha stopped importing the XTX660 into Aus, Kevin made the change to a KTM990SMR - I follow him a bit on his forum (www.ktmsmt.com) because I'm thinking of doing the 990SMT next. From what I gather, he is using the same principle to address the problem on KTM 990s, and supplying a similar product for the users on the forum (hopefully still doing it). He used to supply the wiring schematic on early version gizmos, but got burnt with people taking his IP, making the devices and selling them on eBay etc, so I respect his stance on supplying the gizmo only.

    Join up and look him up there (www.ktmsmt.com username: kevxtx) and tell him 'Hello' from Eukol. He also (as he did with our bikes) has a complete modification encyclopaedia on offer outlining all the (mostly performance) mods he's come up with (extra cooling fan, airbox mods etc) for the keen DIYers. Happy to do this for him - I don't know him outside of the XT660 forum, but respect what and how he does - he always had time and interest to answer questions - top bloke :D
  2. Kafn8td

    Kafn8td Been here awhile

    Joined:
    May 31, 2012
    Oddometer:
    180
    Kevin is awesome! There is no gizmo however for the SMT. He is using tune ECU and a PC V to address the issue. With tune ECU we can share tunes as they are created either through a Autotune 300 or on a Dyno.

    Like I said earlier, my bike never had a snatchy throttle, although it was very difficult to start. With Leo Vince's, CPR air box, SAS blocked off and secondary flies and actuator rods removed, it is like a different motor.
  3. Eukol

    Eukol n00b

    Joined:
    Mar 6, 2013
    Oddometer:
    2
    They all in Kev's KTM990 'pedia?
  4. Scutty

    Scutty Been here awhile

    Joined:
    Jul 19, 2011
    Oddometer:
    388
    Location:
    Sunny Surrey, UK
    Every one - its a must-have for any SMT owner
  5. prooney377

    prooney377 Pete Rooney

    Joined:
    Feb 27, 2011
    Oddometer:
    50
    Location:
    Liverpool, rain capital of England.
  6. bart802

    bart802 Adventurer

    Joined:
    Mar 23, 2010
    Oddometer:
    64
    Location:
    Michigan
    I have a 2013 SMT on order. Good thing I have my DR650 to ride while I wait for it ! Has anyone heard when they might show up here in the U.S. ?
  7. Cortez

    Cortez BAZINGA!

    Joined:
    Apr 22, 2006
    Oddometer:
    7,208
    Location:
    Croatia
    Yeah!
    Late August!

    :deal:deal
  8. MIghty

    MIghty Been here awhile

    Joined:
    Jan 27, 2012
    Oddometer:
    109
    Location:
    South Jersey
    Augest? Wow. A lot later than last year. I got mine in May
  9. goodcat8

    goodcat8 I can pass this guy.....

    Joined:
    Feb 19, 2008
    Oddometer:
    3,050
    Location:
    Los Angeles
  10. Davo-55

    Davo-55 Long timer

    Joined:
    Oct 28, 2009
    Oddometer:
    1,668
    Location:
    Roanoke, Virginia
    I am waiting to join this club. Patiently waiting. They were supposed to be here mid January. Then mid February. Now any day. WHERE IN THE HELL IS MY 2013 990 SMT?? I want. Black please.
  11. MIghty

    MIghty Been here awhile

    Joined:
    Jan 27, 2012
    Oddometer:
    109
    Location:
    South Jersey
    They said the same thing to me last year. Finally got it in may. Well wroth the wait.
  12. Alarm

    Alarm Been here awhile

    Joined:
    Nov 11, 2010
    Oddometer:
    296
    Hello,

    maybe it sounds like a silly question, but does the '09 model have a 12v plug ?
  13. bigboyxl

    bigboyxl Been here awhile

    Joined:
    May 24, 2011
    Oddometer:
    394
    Location:
    Czech republic
    mine was mounted by a dealer
  14. burgerking

    burgerking echt bezopen

    Joined:
    Oct 23, 2005
    Oddometer:
    631
    Location:
    Holland
    No but it has 2 12V acc. leads just behind the steering head, one that is constantly on and one that switched by the ignition.

    The 12V plug is mounted on SMT's from 2011 onwards
  15. Alarm

    Alarm Been here awhile

    Joined:
    Nov 11, 2010
    Oddometer:
    296
    Thank you very much !
  16. Alarm

    Alarm Been here awhile

    Joined:
    Nov 11, 2010
    Oddometer:
    296
    As i am really interested in a '09 or '10 model , it would be great if someone could provide me with following information:

    1) Are there any major differences between 09 and 10 model ?

    2) I have seen that there was a recall for the suspension system, are
    there any known issues that seem to rise up on the SMT series ? water cooling system, clutch or anything else.

    3) What has to be checked on the 30.000km service ? Valves, oil , anything else?

    4) Does the akrapovic exhaust system (not full system) increase fuel consumption ?

    5) Is there something i should pay extra attention on the SMT, since it will be a used bike.

    Thank you in advance
  17. Scutty

    Scutty Been here awhile

    Joined:
    Jul 19, 2011
    Oddometer:
    388
    Location:
    Sunny Surrey, UK
    Hi

    Although this is a good thread those type of questions would be much better asked aver at ktmsmt.com forum
  18. Alarm

    Alarm Been here awhile

    Joined:
    Nov 11, 2010
    Oddometer:
    296

    Thank you . I will do that.
  19. burgerking

    burgerking echt bezopen

    Joined:
    Oct 23, 2005
    Oddometer:
    631
    Location:
    Holland
    As far as I know
    1. No
    2. Recall on suspension? no clue never had an issue regarding this with my 09
    3. Sorry no idea
    4. Depends, standard map no, akra map yes.
    5. Most likely issues, the clutch slave cylinder, although with SMT's that is rarer since they are relatively (vs the 950/990 Adv) new.
  20. bart802

    bart802 Adventurer

    Joined:
    Mar 23, 2010
    Oddometer:
    64
    Location:
    Michigan
    Just heard from my dealer , my smt will be in next week !
    :clap