990 running hot this year

Discussion in 'Dakar champion (950/990)' started by tahoeacr, May 20, 2009.

  1. tahoeacr

    tahoeacr Long timer

    Joined:
    Jan 7, 2007
    Oddometer:
    2,266
    Location:
    Lake Tahoe
    Seems kinda strange. The air temps aren't that high yet. My bike just runs the fans alot off-road this year. Just did an oil change and all is good. No coolant loss either. Oil temps yesterday got to 242. Climbing up a canyon in the dirt averaging about 30 mph. I have never seen anything higher than 226. I was also down on HP at my last dyno session. Could have been the different airbox, but it's the same thing that SD's are seeing 5-10 hp gains. I think I'll do a leak down/compression test. What #'s are you all getting? I think I read 195+-. Break my heart if I have to pull the heads off:evil .
    #1
  2. azkiwi

    azkiwi message in a bottle

    Joined:
    Aug 11, 2004
    Oddometer:
    10,630
    Location:
    Upstate AZ
    Global warming :D

    Really though, there are other external variables in oil temperature. Humidity, terrain, rider input to name a few.

    If you modded the airbox you might be running leaner now. If you're making more power why would you not expect more heat? :dunno
    #2
  3. tahoeacr

    tahoeacr Long timer

    Joined:
    Jan 7, 2007
    Oddometer:
    2,266
    Location:
    Lake Tahoe
    Not making more power. Air/fuel ratios are in the low 12's. Plenty rich. Airbox temps are lower than with a stock air box. Terrain was uphill, but I was running mid throttle at 3-5K. Far less load than I put on it last year in the desert at 100+ temps. I could see it if it was all first gear slow riding with no air flow to the oil tank.

    I think your right. It's global warning=longer riding seasons.
    #3
  4. Rellik

    Rellik o-KAY!

    Joined:
    Sep 4, 2007
    Oddometer:
    590
    Location:
    Calgary

    Noticed the exact same thing with mine :huh
    #4
  5. cpmodem

    cpmodem Orange Caveman

    Joined:
    Nov 29, 2004
    Oddometer:
    7,130
    Location:
    masa yee yah tee 59° 14' 9" N / 135° 26' 42" W
    Or that crappy fuel they're selling these days.:baldy
    #5
  6. simonpig

    simonpig droppin' jewels

    Joined:
    Nov 14, 2006
    Oddometer:
    1,434
    Location:
    NYC
    My 990 went up to 6 bars the other day in NY traffic. Wasn't super hot either. I think these things are made to go fast all the time.
    #6
  7. Jhalls

    Jhalls Been here awhile

    Joined:
    Jul 18, 2007
    Oddometer:
    106
    Location:
    ATL, Rollin with the big dogs
    I am not new to bikes by any stretch of the imagination but I am new to my KTM 990 ADV.

    I too have noticed that it seems to run hot. I was also wondering if that was the norm. I just bought on 07 with 5k on the clock for 8.5k so am well happy with it but I wondered if I had a problem when in traffic I saw 5 bars.

    I guess not from readind this post.
    #7
  8. tahoeacr

    tahoeacr Long timer

    Joined:
    Jan 7, 2007
    Oddometer:
    2,266
    Location:
    Lake Tahoe
    There's a good point. Next comparable day I'll fill her with race gas and do the same canyon.
    #8
  9. azkiwi

    azkiwi message in a bottle

    Joined:
    Aug 11, 2004
    Oddometer:
    10,630
    Location:
    Upstate AZ
    Its all relative, eh? If KTM just added a bar at the top, everyone would be happy. :D
    #9
    Simosez likes this.
  10. Dogtown

    Dogtown Been here awhile

    Joined:
    Apr 4, 2008
    Oddometer:
    433
    Location:
    Marin County
    I pulled off the stock plastic restrictive radiator guard and put on one of those steal after market jobbers and run 10-20 deg cooler!!!:clap
    #10
  11. raddad

    raddad Raddad

    Joined:
    Aug 2, 2011
    Oddometer:
    39
    Location:
    Scottsdale, AZ
    What year is your bike Dogtown?
    #11
  12. raddad

    raddad Raddad

    Joined:
    Aug 2, 2011
    Oddometer:
    39
    Location:
    Scottsdale, AZ
    I have a 2011 990 R and it runs hot. I have put on ti exhaust, added the extra fan, removed scog converters and other smog bits, remapped by factory mechanic. It runs cooler, but it is still too hot. I know from the factory they set them up incredibly lean to pass smog - hence the warm running, but I have done everything to cool this bike down and it still runs hot in my humble opinion. Any other suggestions?
    #12
  13. nk14zp

    nk14zp Long timer

    Joined:
    Feb 24, 2010
    Oddometer:
    2,861
    Location:
    Maine
    5 bars is normal on my 06 950adv. Cleaning the radiator made the biggest difference in cooling. It looked clean but when I cleaned the bike to check the valves it did run cooler after. Also noticed it stays cleaner with the high fender.
    #13
  14. Whodatschrome

    Whodatschrome Long timer

    Joined:
    May 4, 2015
    Oddometer:
    2,695
    Location:
    North of North Plains
    Just how hot is it?
    #14
  15. Rharr

    Rharr Been here awhile

    Joined:
    Apr 5, 2014
    Oddometer:
    887
    Location:
    Tucson Az
    Waterless coolant, like Evans or zipty racing, sh847 series regulator, and a good synthetic 15-60 oil. That's about all that is left to do without adding a oil cooler. The series regulator shuts off the stator to control voltage instead of shutting extra volts which add heat to the stator. Plus removing the plastic rad guard and using a open racing one and washing out the rad regularly
    #15
    Bonnie & Clyde likes this.
  16. DerViking

    DerViking Shred

    Joined:
    Mar 8, 2006
    Oddometer:
    1,563
    Location:
    Black Bill Park
    Always worth remembering to check your sensors. A bad thermostat sensor might send you down an unnecessary path. I've borrowed a high zoot thermal scanner from work, and used that for checking engine temp. I was mostly curious if I could "see" the hot spot that was causing dieseling on a two stroke. Ended up spending a highly educational afternoon firing up different vehicles and watching how they warmed up.
    #16
  17. Whodatschrome

    Whodatschrome Long timer

    Joined:
    May 4, 2015
    Oddometer:
    2,695
    Location:
    North of North Plains
    For reference...
    2D58245C-2899-4A1D-B80E-43F87CE4493F.jpeg
    #17