Cooling fan temp switch

fasteddy · Dec 14, 2008

KTM 530 THERMOSWITCH 95-100 DG, 2008, 2009

Old thread new info??

KTM Part #78035045000 THERMOSWITCH 95-100 DG will swap out the 80-85DG switch that comes standard with the fan kit. This should help with battery charging and E- starting reliability by limiting the excessive running of the fan in tight woods or extreme use situations.

Ed...

Chas · Dec 15, 2008

I buy my thermo-sensors from http://www.partsgeek.com for my KTM's. Order 'Auxiliary Fan Switches' (='s thermo-sensor) for a 1984 BMW 318i Sedan. They are inexpensive, $14 or $28 depending on the brand, and available in at least 4 heat ranges ranging from 82 C (180 F) to 99 C (210 F).
The radiator bunghole size is about 14mm which is likely the same as the Berg.

steve · Dec 16, 2008

http://www.husaberg.org/index.php?set_a ... _photo.php

14 * 1.5

Steve

GoldenBoy · Feb 12, 2009

Re: KTM 530 THERMOSWITCH 95-100 DG, 2008, 2009

fasteddy said:
Old thread new info??

KTM Part #78035045000 THERMOSWITCH 95-100 DG will swap out the 80-85DG switch that comes standard with the fan kit.

Just a "heads up" for those interested in this topic. Just found out today that the above item is "discontinued" in KTM's parts list.

AZRen · Jul 2, 2009

Chas said:
I buy my thermo-sensors from http://www.partsgeek.com for my KTM's. Order 'Auxiliary Fan Switches' (='s thermo-sensor) for a 1984 BMW 318i Sedan. They are inexpensive, $14 or $28 depending on the brand, and available in at least 4 heat ranges ranging from 82 C (180 F) to 99 C (210 F).
The radiator bunghole size is about 14mm which is likely the same as the Berg.

Not sure how this translates overseas but for us Yanks I just picked this one up at NAPA for $20.

Threads are M14X1.5 - and is 95C on 90C off.

1984 BMW 318i Sedan

NAPA

Item#: ATM1435033

DAY51 · Mar 7, 2010

What about inline or surface mount switches?

Does anyone have a switch set up for radiators without the bung hole for the fan switch included in the fan kit? This link is from another thread (LeFrog?) but no details as to fit and function or which temp range. It is a surface mount switch, http://catalog.selcoproducts.com/category/disc-thermostats?

Also:
http://www.egauges.com/vdo_indA.asp?PN=ATM-2280
http://www.pegasusautoracing.com/productdetails.asp?RecId=5991
Substitute switch for sender.

Or Weld-in (solder) bungs:
http://www.jegs.com/c/Cooling_Hose-Fittings/10603/10002/-1

Just wondered what's been tried and hopefully true.
Thanks,
DB

KURTS78 · Mar 25, 2010

MIDOGROCKET WHAT KIND OF BIKE ARE YOU EXACTLY RIDING ???

In my personal and humble opinion I think your bike gear is extremely high and maybe you are using to much clutch and the bike is working always in the warmer range, try to lower your gear by changing first your front sprocket (try a 12 or 13 T F SPROCKET), most offroad bikes betwen 250's and 570's use (12/52 and 13/52) you are using a 15/50, so that is like a 13/44 or 12/47, that gear I think is mostly to use it on highways and paved roads..

Good Luck!

Kurt from Caracas Venezuela.

jsmthjsmith83 · Mar 30, 2010

There are many high voltage switches are available in market,you can find following features in proper switch
programmable set point,window and hysteresis function,two outputs programmable 1-100 Hz,max/min. memory,direct or remote installation,LED display with status indication 270° rot able,standardized menu structure,dip tube length up to 1 meter.

steve · Mar 30, 2010

KURTS78 said:
MIDOGROCKET WHAT KIND OF BIKE ARE YOU EXACTLY RIDING ???

In my personal and humble opinion I think your bike gear is extremely high and maybe you are using to much clutch and the bike is working always in the warmer range, try to lower your gear by changing first your front sprocket (try a 12 or 13 T F SPROCKET), most offroad bikes betwen 250's and 570's use (12/52 and 13/52) you are using a 15/50, so that is like a 13/44 or 12/47, that gear I think is mostly to use it on highways and paved roads..

Good Luck!

Kurt from Caracas Venezuela.

Tim, aka MeDogRocket, was on a 550 and then a 450 and like me rides single track a bit. I'm on a 650 and find that using the throttle is hard work, so use the clutch instead to manage drive in slow, tight terrain. Do it all day, and after lunch, its kick time because the battery is done from running the fan.

There are other solutions, eg 'floating the ground', but the higher temp switch helps, and is cheap and simple to implement.

Steve

Steve

Chas · Mar 31, 2010

The newer E-start KTM 2 strokes use a fan kit which has a thermo-sensor which splices into one of the rad hoses. That should be easy to adapt to any bike.

Haskell · Mar 31, 2010

A few of us need to e-mail Husaberg/KTM and suggest controlling the fan on/off by using the coolant temp sensor input and have the computer control the fan ground.
You could use the ECU programer to program at what temperture the fan comes on and goes off
Would be easy for the factory to do!
Have a great ride
Haskell in Idaho

bowser · Apr 1, 2010

why would they do that?
They wouldn't be able to make a killing from selling separate fan kits

fasteddy · Aug 19, 2010

Just an update, I recently purchased and changed out the standard Husa thermo switch with ktm part #78035045000, a 95/100 deg thermo fan switch, rode the bike (2008 FE 550) in sweltering heat over the next 3 days while arrowing and then de-arrowing the course for a local event. Before hand the fan would run almost continuously causing the battery to run down, with the higher temp switch the fan did come on but not near as often as before (the bike never over heated). The battery remained fully charged for the whole three days making button starts the norm. Should have done this a long time ago. The switch can be found as part of the fan kit for 2008 and up exc's.
Price via Munn's and KTMTALK.com is $58.00!!

Ed..

jzfe · Aug 19, 2010

Good info, thanks for the part #. The link did not work for me BTW.

I recently installed the fan kit on my 550. So far i haven't had any battery draining(yet), runs alot too. Only runs for a minute or so after a hot shut down. I'll likely get that switch anywho. Mind telling us the price?

jz

GregUK · Aug 20, 2010

fasteddy said:
I recently purchased and changed out the standard Husa thermo switch with ktm part #78035045000, a 95/100 deg thermo fan switch,

I had battery issues with my 2008 FE450 when riding slow technical trails in the south of Spain when the fan would run almost continuously. I never had the same problems in the UK as it's winter here all year long!

I have just swapped the bike for a 2011-spec FE570 and have a fan kit to fit to that this weekend. I note that the thermo-switch for the 2011 fan kit is marked 100-95 and is listed as part number 78035045000. Now there's a thing!

Greg

fasteddy · Aug 20, 2010

GregUK said:
fasteddy said:

I recently purchased and changed out the standard Husa thermo switch with ktm part #78035045000, a 95/100 deg thermo fan switch,

Click to expand...

I had battery issues with my 2008 FE450 when riding slow technical trails in the south of Spain when the fan would run almost continuously. I never had the same problems in the UK as it's winter here all year long!

I have just swapped the bike for a 2011-spec FE570 and have a fan kit to fit to that this weekend. I note that the thermo-switch for the 2011 fan kit is marked 100-95 and is listed as part number 78035045000. Now there's a thing!

Greg

LOL, Who would have thought!!
8O 8O

Ed

Chas · Aug 22, 2010

fasteddy said:
The switch can be found as part of the fan kit for 2008 and up exc's.
Price via Munn's and KTMTALK.com is $58.00!!

Don't waste your money on the OEM sensor, as the same unit for an '84 BMW 318i auto (and others) is available for $20 or less.

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Cooling fan temp switch

fasteddy

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GoldenBoy

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DAY51

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steve

Chas

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bowser

fasteddy

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GregUK

fasteddy

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