Adjusting wheel size on 990 odometer?

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by HellSickle, Apr 2, 2013.

  1. HellSickle

    HellSickle Scone Rider

    Joined:
    Sep 19, 2005
    Oddometer:
    9,693
    Location:
    Fort Collins
    My odometer is off by at least 5 miles per hour at highway speed. I see the wheel circumference pop up on the odometer at startup, but I can't figure out how to adjust that in the computer. I have been all through the owner's Manual and pushed every conceivable combination of buttons.

    Help?
    #1
  2. Peanuts

    Peanuts Long timer

    Joined:
    Sep 12, 2009
    Oddometer:
    1,765
    Location:
    Beautiful but often rainy North Yorkshire, UK
    09 onwards? You have to cut the brown/black striped wire on the speedo connector and leave it cut to enable access to the wheel size function.

    To adjust the wheel size<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:p></o:p>
    1- press MODE to go to TRIP 1<o:p></o:p>
    2- Hold the MODE key for around 10 sec<o:p></o:p>
    3- It will show actual wheel size. Use the MODE key to increase the wheel size and the SET key to decrease it<o:p></o:p>
    4- Hold the MODE and SET key to exit<o:p></o:p>
    <o:p></o:p>
    The default size on the 990R is 2205mm circumference for the 21" wheel. <o:p></o:p>
    19" - 2040 mm<o:p></o:p>
    17" - 1882 mm

    so if yours is 10% out, adjust the circumference figure by 10% and go try again :)
    #2
  3. HellSickle

    HellSickle Scone Rider

    Joined:
    Sep 19, 2005
    Oddometer:
    9,693
    Location:
    Fort Collins
    Thanks!
    #3
  4. geometrician

    geometrician let's keep going...

    Joined:
    May 25, 2008
    Oddometer:
    1,037
    Location:
    West-By-God Virginia
    There is a pretty big difference in tire circumferences between types, brands, etc.

    I got into the habit of measuring the distance (in millimeters) it takes to roll the bike forward until the same point on the tire touches the (flat, smooth) ground. It takes a few minutes but then you know your favorite tire size.

    Having put tons of bicycle speedos on roadracing bikes/street customs over the years this makes a difference- they are usually more accurate than anything coming from the factory!
    #4
  5. Rally_West

    Rally_West Central Scrutinizer

    Joined:
    Feb 9, 2007
    Oddometer:
    196
    Location:
    Redondo Beach
    Does this trick for 2007 or just the '09 and later? Mine is off about the same.
    #5
  6. Peanuts

    Peanuts Long timer

    Joined:
    Sep 12, 2009
    Oddometer:
    1,765
    Location:
    Beautiful but often rainy North Yorkshire, UK
    Early bikes with seperate speedo have less flexibilty of wheel size.

    Instead of choosing the circumference (or how far the wheel travels when it does one full turn) you only get to choose from 21", 19" or 17".

    Try setting it to 19" if you have 21" wheel, its close to GPS speed, but there is no safety factor to protect your licence ;)
    #6
  7. scottrnelson

    scottrnelson Team Orange

    Joined:
    Apr 3, 2006
    Oddometer:
    1,523
    Location:
    Folsom, CA
    I was able to modify my 2008 using the mode button as described. I tried all of the settings and compared it to my Garmin Zumo 550. The 19" wheel setting is within one mph at all legal speeds for my bike (which has a 21" front wheel).

    So now I have an accurate speedometer and an inaccurate odometer. The KTM odometer indicates that I have traveled about 3-5% fewer miles than my GPS indicates. I can live with that, although it makes the fuel mileage calculations look even worse.
    #7
  8. Jonny955

    Jonny955 Been here awhile

    Joined:
    Feb 14, 2007
    Oddometer:
    285
    Location:
    Horsham, Sussex
    Just as a comparison, I checked the accuracy woth GPS the other day.

    Bike: 990 (2012 model) with standard 21" front wheel & Pirelli Scorpion
    GPS: Garmin Montana

    What I found surprised me a little. The speedo reading on the KTM is pretty accurate and within ~2.5%. It's not so easy to gauge at lower speeds due to the whole integer reading so these are as accurate as I could get in the time I had, based on a steady straight line ride;
    KTM 31mph = Garmin 30mph
    KTM 40mph = Garmin 41mph
    KTM 70mph = Garmin 68mph
    KTM 100mph = Garmin 97.something mph (private road, of course :evil)

    If I change mine to the 19" wheel setting, the speedo will under-read by a greater margin.

    Jon
    #8
  9. HellSickle

    HellSickle Scone Rider

    Joined:
    Sep 19, 2005
    Oddometer:
    9,693
    Location:
    Fort Collins
    Cut the wire, still doesn't do anything. Engine off or engine on, doesn't matter. You don't suppose I need to move it for a bit first? That's the only other thing I can think of. I sure would like to have an accurate speedometer, but I'm about ready to button it back up and live with it.
    #9
  10. Peanuts

    Peanuts Long timer

    Joined:
    Sep 12, 2009
    Oddometer:
    1,765
    Location:
    Beautiful but often rainy North Yorkshire, UK
    Did you have TRIP 1 display showing before you pushed the MODE button again and held it a while?
    #10
  11. HellSickle

    HellSickle Scone Rider

    Joined:
    Sep 19, 2005
    Oddometer:
    9,693
    Location:
    Fort Collins
    Yup. Held it up to 30 seconds in both trip 1 and trip 2. Nada. Definitely cut the brown/black (equal-stripped wire).
    #11
  12. BuilderScott

    BuilderScott Been here awhile

    Joined:
    Jan 3, 2011
    Oddometer:
    991
    Location:
    Lyons, Colorado
    My 950 is new-to-me and the speedo is about 6mph high at 80mph. If anyone has input on the 950 computer, :ear ... Thanks for the input. :freaky
    #12
  13. HellSickle

    HellSickle Scone Rider

    Joined:
    Sep 19, 2005
    Oddometer:
    9,693
    Location:
    Fort Collins
    Don't the above instructions work for you?

    Mine is a 2010 990. The referenced instructions did not work. My new HID bulbs arrived, so I'm ready to put it back together. Not knowing what the brown/black wire does, I'll have to solder it back together & button things up.

    Edit: Google search shows that others are still struggling with this issue. I'm going to call my expert dealer tomorrow and see if he has any tips. Some of the instructions state to press both buttons while in trip F. I can't seem to get back to trip F now. Puzzled.....
    #13
  14. DeeGee

    DeeGee I'm a Yorkshireman thanoz

    Joined:
    Jan 2, 2008
    Oddometer:
    1,885
    Location:
    Up North In The UK!
    The above instructions don't work on the 950. I've just tried it in trip 1 and trip 2 and all it does is convert from MPH to KMPH.

    Any ideas?
    #14
  15. HellSickle

    HellSickle Scone Rider

    Joined:
    Sep 19, 2005
    Oddometer:
    9,693
    Location:
    Fort Collins
    I gave up. Even my dealer couldn't help. I'm just living with the error.
    #15
  16. alongat

    alongat Long timer

    Joined:
    Jan 20, 2010
    Oddometer:
    1,272
    Location:
    Toronto, Canada
    I did the speedo calibration a few days ago on my 2012 Adventure R:
    1- removed the brown / black wire out of the gauge cluster's harness (rather than snipping it),
    2- hit "mode" until gauge was in "Trip 1"
    3- held the 'mode" button for ten seconds and it went into "length" mode (I suppose they mean circumference)
    4- adjusted accordingly for my new 19/17 wheels
    5- pressed "mode" and "set" buttons to save and exit calibration settings

    Worked like a charm for me. I will say however that for a brief second, I almost confused the brown / black wire with a black / orange wire in the same harness - double-check that you have removed the correct wire and simply leave it disconnected permanently so you can make future changes on the fly...
    #16
  17. HellSickle

    HellSickle Scone Rider

    Joined:
    Sep 19, 2005
    Oddometer:
    9,693
    Location:
    Fort Collins
    Thanks. I'll give that a try next time I have the bike apart. Perhaps I confused the wires and removed the brown/orange instead.
    #17
  18. olec

    olec Rookie

    Joined:
    Jun 10, 2008
    Oddometer:
    273
    Location:
    Norway - the land of the Vikings
    Works here too! Bike is '11 990R EU model. The brown / black wire is in the middle of everything. The connector didnt have any numbering and I do not have the wire diagrams, so I do not know the "Number". But it works and its the only brown / black wire there.
    #18
  19. Zuber

    Zuber Zoob

    Joined:
    Sep 28, 2004
    Oddometer:
    2,217
    Location:
    Main Street, Shedd, Oregon
    950 and 07-08 990's, you only get the 1719/21 wheel size choice.
    At 60 mph you are doing 56, go 10.4 miles to make 10 miles.

    For the 09-newer, pull the wire, tape it up. Then you can adjust all you want. Looks like Brown with Black stripe.

    Info here for 690's also.

    Old thread>
    http://advrider.com/forums/showthread.php?t=606948
    #19
  20. scottrnelson

    scottrnelson Team Orange

    Joined:
    Apr 3, 2006
    Oddometer:
    1,523
    Location:
    Folsom, CA
    I have a 2008. I set it to 19" and it is within 1 mph of my GPS at pretty much all speeds that I ride it at.

    The odometer is off by about 5%, but that doesn't bother me nearly as much as having the speedometer off.
    #20