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Old 07-11-2009, 08:11 AM   #16
CodeMonkee
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Quote:
Originally Posted by AlphaMike
Yeah, but the 102C we're talking about is the coolant temperature, not the oil temperature. If the coolant is at 102C, then how hot is the oil? 110C? 120C? More?

And just because the fan comes on at 102C doesn't mean the coolant never gets hotter than 102C.
That is true. But if you don't measure you don't know. You can't assume that if the coolant is 200 to 220F that the oil is too hot. The only way to know for sure would be to have an oil temp gauge/readout.

Personally I think bikes should have a number of engine status readouts that are more important than a tach (not just idiot lights - but at least idiot lights, but if you have idiot lights you have a sensor and you can have a readout.):

Oil pressure
Oil temp
If water cooled then coolant temp
Battery voltage.
A fuel gauge that actually works.
An odometer

I would give up the tach and speedo on my Duck if I could get oil pressure, batt. voltage and a fuel gauge that works as well as the one in my car - but with modern electronics there is no reason to no have all of these and just switch between modes.

My Whoosaburger has no tach, only a speedo, an hour meter, a clock and various odos.
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CodeMonkee screwed with this post 07-11-2009 at 08:22 AM
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Old 07-18-2012, 02:42 PM   #17
svracer01
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Quote:
Originally Posted by Spearo View Post
I ordered the E-bay thermoswitch and was not impressed with what I received. I asked for specific clarification that I would receive an 85-degree switch. The switch I received from E-bay came with a POS stamped O-ring and the switch is stamped 88-ON. Do not use the E-bay o-ring.

With the 88-deg switch the KTM 690SMC fan turns ON at 8-bars although, I feel ripped off. Ahhh… just another E-Bay customer!

For laughs I un-earthed my ATV out of the mountain of crap in the outside garage. There I found the answer to my reason for starting this thread.

Green – 88-deg ON : LTZ400
Blue – 102-deg ON : 690SMC
Red – 88-deg ON : “The Ebay Switch”

Stop getting ripped off by E-Bay and get a thermoswitch for a Suzuki LTZ400. The Suzuki LTZ400 is a Kawasaki KFX-400 is an Arctic Cat DVX-400. Suzuki makes it and sells it to Kawasaki and Arctic cat, It is a very good 400cc Sport ATV.

The Green switch in the picture is from my 2006 Suzuki LTZ-400. You should be able to get it from any Suzuki, Kawasaki or Arctic Cat dealer for $40-US. Use the KTM o-ring with it.

Down with E-bay…

DaNewbie





ive got an 07 SM and i followed your advice and got an 07 LTZ400 fan switch. i was changing the coolant anyway so i drained it all, changed the switch, refilled and then brought the bike up to temp. all the way up to 9 bars.....still no fan.
any suggestion?
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Old 07-19-2012, 12:51 AM   #18
LukasM
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Quote:
Originally Posted by svracer01 View Post
ive got an 07 SM and i followed your advice and got an 07 LTZ400 fan switch. i was changing the coolant anyway so i drained it all, changed the switch, refilled and then brought the bike up to temp. all the way up to 9 bars.....still no fan.
any suggestion?
Is the fan fuse good? You can check if it's the switches fault by simply connecting the wires.
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Old 07-19-2012, 05:23 AM   #19
alongat
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Hasn't anyone tried one of these:

http://www.ktmtwins.com/ktm-690-part...rmostat-switch
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Old 09-20-2012, 01:33 PM   #20
Brown Dog
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My Ebay switch took a dump & wont turn the fan on
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Old 09-20-2012, 01:51 PM   #21
Uller
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Quote:
Originally Posted by Brown Dog View Post
My Ebay switch took a dump & wont turn the fan on
Same here. I went with the switch above from KTM Twins. It was the cheapest I could find......
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Old 09-20-2012, 03:49 PM   #22
Brown Dog
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I put my stocker back in for now, but I'm ordering one from ktmtwins too
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Old 09-21-2012, 06:03 AM   #23
It'sNotTheBike
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[QUOTE=Spearo;9982852]
The stock switch turns on only once the coolant temperature has reached 102 Celsius.

Who know what the oil temperature is at that point... breaking down...[QUOTE=Spearo;9982852]



Who know ( sic ) how to engineer an engine best ? You or the KTM engineers ?

I'm betting on the KTM engineers.

In any case, synthetic oil as specified for the 690 engine doesn't "break down" at 102 degrees C. or even 120 C.


From what has been written here, the OP seems intent on cooling the engine without having first gathered data on what the engine oil temperatures are. The overwhelming probability is that the engine oil temperatures are ( before any changes to the cooling system ) well within design parameters and there is no need to force the engine to run cooler.

The OP doesn't seem to
grasp that an engine needs to operate at temperatures
which are high enough to boil away water which condenses in that engine
when it cools after it quits running. An engine failing to reach such temperatures
is a bad thing. If the engine runs too cool to boil water out of the oil it
will result in accelerated wear on the engine internals due to acids which
occur when water is present in engine oil along with other contaminants which
are a byproduct of the combustion process.

Modern synthetic oils are more than capable of dealing with 102 degrees C. and then
some. The 10W50 Motorex usually specified by KTM can deal with such temperatures
with ease.

This thread is a good example of why it is unwise to blindly follow just anyone's ideas on the internet.
If the OP here told you he knew that venting your skull with an ice pick would result in your brain
working better would you go grab an ice pick and proceed to operate ? Of course you wouldn't. Then why
would you redesign your motorcycle based on the opinion of a person who obviously has no professional
qualifications relevant to engine design or oils ?


Better to consult with a professional engineer, or at least read some SAE papers on synthetic engine oils
and the ability of those oils to deal with temperatures well above the sea level boiling temperature of water
( 100 degrees Celsius ) and why engines need to run hot enough to work as designed, which includes the
oil exceeding the temperature of the boiling point of water every time the engine is run at full operating temperature.

Kudos to Codemonkee for his typically logical approach, which sadly is often ignored by people
in this forum, some of whom seem to willfully ignore facts in the manner of a person who embraces
superstition as a guiding light.

.

It'sNotTheBike screwed with this post 09-21-2012 at 07:34 AM
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Old 09-21-2012, 08:11 AM   #24
zxrider11
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Well written advice.

Too many people that think they have to re-engineer what the engineers did.
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Old 09-21-2012, 09:11 AM   #25
Bill the Bong
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Maybe you two should first own a 690. Just saying...
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Old 09-21-2012, 10:24 AM   #26
zxrider11
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Quote:
Originally Posted by Bill the Bong View Post
Maybe you two should first own a 690. Just saying...
Here is my 2012, very happy with the bike so far.

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Old 09-21-2012, 10:32 AM   #27
CanadianX
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Quote:
Originally Posted by Albie View Post
I guess he doesn't want to wait till it hits 88 degrees before the fan kicks on. I'm guessing that's why he wants one that kicks the fan on at 80 - 85.
88 will take you back to the future
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Old 09-21-2012, 12:20 PM   #28
Uller
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Quote:
Originally Posted by It'sNotTheBike View Post
This thread is a good example of why it is unwise to blindly follow just anyone's ideas on the internet.
If the OP here told you he knew that venting your skull with an ice pick would result in your brain
working better would you go grab an ice pick and proceed to operate ? Of course you wouldn't. Then why
would you redesign your motorcycle based on the opinion of a person who obviously has no professional
qualifications relevant to engine design or oils ?
.
I was reading what you stated until I got to the highlighted part and then, I decided your full of shit and I could really care less what your opinion is......
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Old 09-21-2012, 12:45 PM   #29
Albie
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Quote:
Originally Posted by CanadianX View Post
88 will take you back to the future
Just so long as the flux capacitor is charged up.
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Old 09-21-2012, 12:48 PM   #30
Albie
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Quote:
Originally Posted by Bill the Bong View Post
Maybe you two should first own a 690. Just saying...
Had mine with the stock switch for 5 years and 27K miles. Hasn't burnt up yet, much less ever overheated.
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