LC8 Adventure Second Fan Install

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by cyborg, Feb 18, 2011.

  1. the octopus

    the octopus The Chef

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    I'm glad I posted before pulling the trigger on the fan! Thanks for the info. Back to the hunt for a fan at the lowest price so I can get my 990 set up as soon as I receive my bracket and splitter.
    #21
  2. GoNOW

    GoNOW Long timer

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    Reall? No such problems on my 04.

    #22
  3. Guano11

    Guano11 Stop me if you've heard this one....

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    I thought that only worked on Japanese bikes.:augie

    Great documentation on the install; thanks for posting. Anxious to hear how it performs for you.
    #23
  4. Bill 310

    Bill 310 Poser Emeritus

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    Is there a waiting list to order a complete fan kit when you they are back in stock?

    I have a 990 ADV.



    #24
  5. cyborg

    cyborg Potius Sero Quam Numquam

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    To test the new dual-fan setup I just installed and the RED 200F water temp sensor I also installed after the second fan install (OEM sensor is BLUE 220F, see both below) I did the 15 minute idle reset, which is also a good way to get the bike up to full temp.

    [​IMG]

    5-7 minutes into the run the bike was up to 4 bars and holding steady and the dual fans were cycling on and off regularly, good solid blasts of hot air off both sides, which means the bike was holding steady temp regulation at a lower temp (200F) than before at idle, a good sign. :thumb

    A quick voltage test showed no drop in voltage (high 13's) as the fans cycled on and off, which means the charging system was easily keeping up even at idle.

    After reading keeners caution, I felt the right side tank where the fan blows on it and it was very hot. Now I know that in normal operation with no second fan, hot air off the radiator blows through there also, but maybe the forced hot air will heat up that inside tank surface more than what it would normally get, also heating up the fuel itself a bit more too. I'm not really worried all that much about the issue, but will probably lay in some self-adhesive gold or silver heat shield to the inner tank surface right where the forced air blast hits it, to reduce heat transfer to the tank. That should be enough to take care of it, and won't be externally visible.

    I have added extra heat shield to several places on the bike, like on my airbox for example, to reduce engine heat transfer to the incoming air

    [​IMG]

    and right tank already to reduce exhaust pipe heat transfer, so this will just be a bit more.
    #25
  6. keener

    keener Speed changes you.

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    I'm surprised. It is a known issue. There is a reason KTM added that Fan Cap on higher models.
    #26
  7. GoNOW

    GoNOW Long timer

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    That's news to me. I was told it was just to keep the hot air off the drivers leg. I do have the fan cap, just never installed it. Been fine in 114 degree heat with no tank problems.


    #27
  8. Geek

    Geek oot & aboot

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    Hey Cliff... Moab the end of March? :deal :evil
    #28
  9. cyborg

    cyborg Potius Sero Quam Numquam

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    PM'd ya
    #29
  10. mookymoo

    mookymoo Mookish Mook

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    What are the mounting dimensions on the fan?
    Is it the same mounting points as a standard EXC fan?
    #30
  11. Head2Wind

    Head2Wind MotorcycleMayhem

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    Maybe, will need to check what the fan is on the range of possibilities.
    #31
  12. Head2Wind

    Head2Wind MotorcycleMayhem

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    KTM PN: 58435041000 (690, 950SE) "LOOKS" like a similar fan for ~$90USD... however I do not know for sure as I do not have one in hand. Also, the connector is different so will need to be modified/adapted.
    #32
  13. Chipper

    Chipper Been here awhile

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    The fan off 4 strokes works, I have it on mine with H2W' s bracket. Did have to splice different plug on but same fan.
    #33
  14. Bill 310

    Bill 310 Poser Emeritus

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    I think the heat shield looks like a good idea. I checked out some suppliers and see different types,attachment processes, and heat reflectig temps.

    Which tape should I buy?



    #34
  15. Head2Wind

    Head2Wind MotorcycleMayhem

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    What I have used:

    Frost King; 1/8" closed cell foam, aluminum faced, self adhesive. I have used this on the air box, edge seam sealed with the NASHA tape.

    NASHA: 300 deg F rated, 3" wide dead soft aluminum, self adhesive tape. I have used this as seam tape and also applied to the interior surface of both fuel cells.

    HELIX brand: High temp, woven glass/ceramic body, aluminum faced, self adhesive, 18" X 18" sheet. This material works great where exhaust system components come in close contact with plastic body panels. I have used this to replace the failure prone OEM heat shield on the right/lower section of the right side fuel cell near where the front header pipe passes through. I then edge taped it in with the NASHA tape.

    <a href="https://picasaweb.google.com/lh/photo/W2DasZFQW6tLjXNBCX2f9g?feat=embedwebsite"><img src="https://lh6.googleusercontent.com/_peAio9mDcUM/SLTTsFExUpI/AAAAAAAACOM/PoMRe0XAE6Q/s640/P1000119.JPG" height="480" width="640" /></a>

    <a href="https://picasaweb.google.com/lh/photo/mlGIuIw5VuQzggbs96p05g?feat=embedwebsite"><img src="https://lh5.googleusercontent.com/_peAio9mDcUM/SLTT4w6Vm5I/AAAAAAAACPM/TtG7W4-rRQE/s640/P1000127.JPG" height="480" width="640" /></a>
    #35
  16. Bootsy

    Bootsy Been here awhile

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    That part(60035044050) doesn't fit on the right side.!!!




    WARNING,....

    Heat from the new fan will most likely cause the paint and stickers on your right gas tank to bubble up.

    This is what happens to older 950 bikes that didnt have a fan cap (60035044050). I had to order one from higher models OEM parts.
    #36
  17. DSM8

    DSM8 Where fun goes to die....

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    Put some rice in it and shake the hell out of it.
    IT works.
    #37
  18. Head2Wind

    Head2Wind MotorcycleMayhem

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    correct.... the 5.2" fan is larger than the 4" fan....and will not fit the bracket. It is possible to fit the 5.2 into the right side, however there is not enough room for it to be mounted with a bracket, requires attaching directly to radiator transfer tubes.... and its TIGHT fit at best... The bonus is the 5.2" fan pulls almost 50% more air than the 4" at 2.5 inHg

    The 5.2" fan is ~$78 bucks


    #38
  19. alshaffer

    alshaffer Been here awhile

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    Being a new 990-Adv rider, after reading seemingly hundreds of blogs on cooling fan issues I decided to go to the source ... Kurt at BDCW in this case. Just today, he said they're working up an aux fan solution for the 990-Adv bikes that should be available in June. For those of you out there who put a lot of stock in BDCW products (like me), it might be worth waiting for theirs to hit the streets.

    And apologies if this is old news. I didn't read all 3 pages of this thread, but thought it worthwhile info.
    #39
  20. bigkuri

    bigkuri Long timer

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    Top tip - worth waiting indeed. Will be interesting to see what they come up with....
    #40