ktm 690 overheating

Discussion in 'Thumpers' started by casteater, Jul 28, 2012.

  1. casteater

    casteater Adventurer

    Joined:
    Feb 20, 2012
    Oddometer:
    20
    I can't keep my ktm 690 endure r from overheating, I have exhaust on the way as well as the new fan switch. I just removed the thermostat and I was wondering if anybody else has done this before and if it helps or hurts. I am open to anything else to keep it from over heating if there are any other proven methods. Thanks
    #1
  2. garrett

    garrett Been here awhile

    Joined:
    Oct 17, 2006
    Oddometer:
    503
    Location:
    Calgary
    I did some very technical riding in warm temps, 20 deg Celcius, and found the fan came on a lot. The bike has never boiled over but my concern is what happens in hot weather. So, I bought a lower temp sensor, turns fan on sooner, and will be replacing the coolant with Engine Ice. I presume this will keep the temps down.

    Garrett
    #2
  3. bigborefan

    bigborefan Making new friends

    Joined:
    Jul 15, 2007
    Oddometer:
    2,730
    Location:
    USA - Midwest, Central Illinois
    I had an 08. IMO the 690 is not a great tight single track bike, too much motor and heat. I never had any issues other than tight, slow single track though.
    #3
  4. Gros Buck

    Gros Buck Beef = Packed Vegetables

    Joined:
    Jun 29, 2006
    Oddometer:
    849
    Location:
    Quebec City, Canada
    What makes you think it overheats ???

    You can laways use this. http://www.engineice.com/ It's propylene Glycol. Compatible with water (in case of emergency) but not compatible with ethylene glycol coolant (Prestone). You will need to flush you cooling circuitry. But otherwise, it will lower your temperature by around 50 degrees F.

    In extreme cases, you can also use waterless propylene glycol : http://www.evanscooling.com/ You will not be able to mis it with water in case of emergency.

    Paul Jr
    #4
  5. yowcapt

    yowcapt Roaming earth...

    Joined:
    Jul 24, 2019
    Oddometer:
    3
    Location:
    Dubai UAE / Ottawa Canada
  6. theofam

    theofam Been here awhile Supporter

    Joined:
    Nov 12, 2009
    Oddometer:
    744
    Location:
    Denver
    I had the same issue. Here’s how I fixed it:

    Flush the coolant
    Add Engine Ice
    Swap out the fan switch for a 1993 Geo Metro LSi fan switch. It is PN TFS596 at Advance Auto. This drops the fan on temp from 102C to 93-98C and eliminated my overheating situation.
    #6
    Dao1 likes this.