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Old 02-19-2011, 02:17 PM   #16
the octopus
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Fans are available for about $35 on eBay right now. Same fan: 12v SPAL 4" push.
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Old 02-19-2011, 02:29 PM   #17
scapegoat
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Curious if there's any issues reported adding a second fan to the factory wires and plug? anyone know the amp draw of one of these little dudes?
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Old 02-19-2011, 03:03 PM   #18
Head2Wind
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Quote:
Originally Posted by scapegoat View Post
Curious if there's any issues reported adding a second fan to the factory wires and plug? anyone know the amp draw of one of these little dudes?
The OEM fuse for the fan circuit is 10A, the OEM 5.2" fan is rated for ~4A max current for max load. The second 4" fan is rated for just under 2A max load.

Based upon this information I originally determined that the addition of the second fan would be well within the safe limits of the harness and protection fuse.
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Old 02-19-2011, 03:05 PM   #19
Head2Wind
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Quote:
Originally Posted by the octopus View Post
Fans are available for about $35 on eBay right now. Same fan: 12v SPAL 4" push.

The fan that I have spec'd is the PULL fan, not the PUSH. If fit with the harness that I have been making the PUSH fan will blow through the radiator back to front. It may be possible to change the direction of rotation of this fan to make it a PULL type, however I do not know if this will work well or for very long.
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Old 02-19-2011, 03:40 PM   #20
keener
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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.
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Old 02-19-2011, 04:46 PM   #21
the octopus
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Quote:
Originally Posted by Head2Wind View Post
The fan that I have spec'd is the PULL fan, not the PUSH. If fit with the harness that I have been making the PUSH fan will blow through the radiator back to front. It may be possible to change the direction of rotation of this fan to make it a PULL type, however I do not know if this will work well or for very long.
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.
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Old 02-19-2011, 04:52 PM   #22
GoNOW
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Reall? No such problems on my 04.

Quote:
Originally Posted by keener View Post
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.
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Old 02-19-2011, 05:35 PM   #23
Guano11
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Quote:
Originally Posted by viola-tor View Post
Someone here recommended rice. That's right, uncooked rice.
I thought that only worked on Japanese bikes.

Great documentation on the install; thanks for posting. Anxious to hear how it performs for you.
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Old 02-19-2011, 05:40 PM   #24
Bill 310
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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.



Quote:
Originally Posted by Head2Wind View Post
The fan that I have spec'd is the PULL fan, not the PUSH. If fit with the harness that I have been making the PUSH fan will blow through the radiator back to front. It may be possible to change the direction of rotation of this fan to make it a PULL type, however I do not know if this will work well or for very long.
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Old 02-19-2011, 05:55 PM   #25
cyborg OP
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First test

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.



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.

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



and right tank already to reduce exhaust pipe heat transfer, so this will just be a bit more.
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Old 02-19-2011, 08:14 PM   #26
keener
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Quote:
Originally Posted by GoNOW View Post
Reall? No such problems on my 04.
I'm surprised. It is a known issue. There is a reason KTM added that Fan Cap on higher models.
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Old 02-19-2011, 09:49 PM   #27
GoNOW
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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.


Quote:
Originally Posted by keener View Post
I'm surprised. It is a known issue. There is a reason KTM added that Fan Cap on higher models.
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Old 02-19-2011, 09:56 PM   #28
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Hey Cliff... Moab the end of March?
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Old 02-20-2011, 08:57 AM   #29
cyborg OP
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Hey Cliff... Moab the end of March?
PM'd ya
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Old 02-25-2011, 05:54 PM   #30
mookymoo
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What are the mounting dimensions on the fan?
Is it the same mounting points as a standard EXC fan?
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