Author Topic: Cooler Thermostat Fan Switch (Read 2290 times)

SpitFireRSA · « **Reply #20 on:** January 27, 2017, 02:40:07 am »

Quote from: evansv on January 26, 2017, 05:15:40 pm

Here's a picture of the fan switch adaptor I made. I pealed back the rubber boot to make it more obvious.

Nice ! At what temperature does the switch get triggered ?

By looks of it it's just a new switch with an adaptor. Could briefly explain how you made that and what was used for it ?

Maybe someone in future could copy your method

SpitFireRSA · « **Reply #21 on:** January 27, 2017, 02:43:02 am »

Evansv, I noticed that you are running silicone hoses as well, did that make a difference in cooling ?

evansv · « **Reply #22 on:** January 27, 2017, 06:30:34 am »

It is just an adapter.

The reason I did this was that I wasn't prepared to pay R640 + VAT for the KTM 640 switch, as I already had this switch with the enduro fan kit. I'm not sure what the temperature range is. The part number for the kit is 59065041044. I have a manual override switch as well, so I just put the fan on when I'm in traffic, or heavy off road stuff.

The thread for the radiator was 14mm metric fine & the switch I had was 10mm metric fine. I bought a 14mm metric fine bolt & a 12mm metric fine nut. I cut the 14mm bolt to the correct length the & drilled a 8mm hole through the centre. I then welded the 12mm nut onto the remaining 14mm bolt head. Viola. So far so good.

Total cost R36 + a stainless steel welding rod & a bit of black paint.

I don't know if the hoses made a difference to temperature, as I don't have a temperature gauge. I got the hoses in the UK & fitted them, as mine were a bit tired. I also tried running Evans (no relation) waterless coolant, but changed over to standard Motal when a hose came off on a trip. At least water can be used with the Motal coolant.

spankme · « **Reply #23 on:** June 01, 2017, 04:38:23 pm »

http://slavensracing.com/shop/ttv-temperature-switching-meter-ktm-690-husky-701/

MXDURO · « **Reply #24 on:** June 11, 2017, 07:06:48 pm »

With shipping it comes to $150

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IanTheTooth · « **Reply #25 on:** June 11, 2017, 08:15:31 pm »

R39.37 81 degrees C
16mm Thread Radiator Fan Thermo Detect Switch 37760-MT2-003 3042678 For Honda Motorcycle

https://www.banggood.com/Radiator-Fan-Thermo-Detect-Switch-37760-MT2-003-3042678-For-Honda-Motorcycle-p-1050738.html?rmmds=search

Bill the Bong · « **Reply #26 on:** June 12, 2017, 10:06:30 am »

I tried 2 different ones for my 690. The one with the correct thread pitch was of a LTZ400 Suzuki quad. The one of a Big Boy!!! which had a Honda copy engine, did not work.

Colin Kaapschehoop · « **Reply #27 on:** June 26, 2017, 10:15:05 pm »

Suzuki part no. 17680-50F70

miks · « **Reply #28 on:** January 14, 2018, 07:05:02 pm »

Quote from: Colin Kaapschehoop on June 26, 2017, 10:15:05 pm

Suzuki part no. 17680-50F70

My apologies for digging up an old thread, busy part shopping for 690 'essentials' and this was one of the items.

From what I've read it seems like there are 4 options:

1. Suzuki part 17680-50F70. Is the general consensus that the Suzuki switch is the best way to approach this? At which temp does it activate the fan? Not sure on current cost

2. Another option is the Trailtech fan switch/meter. You can manually adjust the temp for when the fan kicks on. $89 excl. shipping = R1100

3. Add a manual on/off switch like what @SpitFireRSA did. Not sure if fans auto on/off is retained by adding the switch.

4. Fan temp switch sensor from another KTM. Not sure on current cost

I will still have to query with KTM which of these will void the bikes warranty

SpitFireRSA · « **Reply #29 on:** January 15, 2018, 03:07:55 pm »

Hi Miks

1. Suzuki part 17680-50F70. Is the general consensus that the Suzuki switch is the best way to approach this? At which temp does it activate the fan? Not sure on current cost

-- Try MotoHut - http://motohut.co.za/contact_us - they had the best prices last time I checked. I didn't go with this as option 3 is working just dandy.

2. Another option is the Trailtech fan switch/meter. You can manually adjust the temp for when the fan kicks on. $89 excl. shipping = R1100

-- Cannot comment on this - but it looks good.

3. Add a manual on/off switch like what @SpitFireRSA did. Not sure if fans auto on/off is retained by adding the switch.

-- As mentioned - this was enough for me right now. Yes, it's a bit of a mission hitting the on off button when you want it - but it works. KTM sold me the switch and didn't mention anything about warranty. Oh - and the auto on/off is retained as you are merely wiring in a second switch to do the same job.

4. Fan temp switch sensor from another KTM. Not sure on current cost

-- Yes, also a possibility.

miks · « **Reply #30 on:** January 15, 2018, 04:35:07 pm »

Thanks!
Will update when I have the bike and make a decision

miks · « **Reply #31 on:** February 08, 2018, 10:58:44 am »

Fitted the lower temp fan switch yesterday and replaced all the coolant while busy

At how many 'bars' of temp does the standard switch come on? I forgot to check before fitting the new switch so have no comparison.

M3X3Z3 · « **Reply #32 on:** February 08, 2018, 12:57:20 pm »

Depending on the bike and ambient temperature, 1 or 2 bars from the top

miks · « **Reply #33 on:** February 09, 2018, 05:24:52 pm »

Since I've fitted the switch, it comes on 3 bars from the top then the temp drops and it goes off - I guess it works

Thumper Dumper · « **Reply #34 on:** February 09, 2018, 08:16:26 pm »

Quote from: miks on February 09, 2018, 05:24:52 pm

Since I've fitted the switch, it comes on 3 bars from the top then the temp drops and it goes off - I guess it works

Which one did you fit?

miks · « **Reply #35 on:** February 09, 2018, 09:29:44 pm »

The coolant temp fan switch 17680-50F70

Ordered from Suzuki R480 excl. VAT

Thumper Dumper · « **Reply #36 on:** February 13, 2018, 09:07:31 pm »

Quote from: miks on February 09, 2018, 09:29:44 pm

The coolant temp fan switch 17680-50F70
Ordered from Suzuki R480 excl. VAT

Thanx

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Swyster · « **Reply #37 on:** June 04, 2018, 08:33:26 pm »

This is a option aswell bought a few in for 990/950 but they fit 690 aswell.

Manual fan switches
https://r.tapatalk.com/shareLink?share_fid=63206&share_tid=223080&url=http%3A%2F%2Fwww%2Ewilddog%2Eza%2Enet%2Fforum%2Findex%2Ephp%3Ftopic%3D223080&share_type=t

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BuRP · « **Reply #38 on:** June 05, 2018, 10:21:26 am »

I am amazed at all these posts above, as no-one mentions switching-temperature?
Goodluck mounting one with a higher temp!

Also, any automotive parts shop will have a catalogue of these things, and there's a few cars (some Suzuki) which have the exact-fit switch.
Better still, this catalogue also lists the switching temperature, pick & choose.
Best, they're very cheap, contrary to bike part prices or the daylight=robbery price of Rally Raid!

It seems I have to do this, as quite frankly the info on this thread is useless.

BuRP · « **Reply #39 on:** June 05, 2018, 10:26:17 am »

Quote from: IanTheTooth on June 11, 2017, 08:15:31 pm

R39.37 81 degrees C
16mm Thread Radiator Fan Thermo Detect Switch 37760-MT2-003 3042678 For Honda Motorcycle

https://www.banggood.com/Radiator-Fan-Thermo-Detect-Switch-37760-MT2-003-3042678-For-Honda-Motorcycle-p-1050738.html?rmmds=search

This is the wrong switch to mount!
It may fit, dunno, but wrong it remains - as there's only 1 terminal present leaving the radiator itself the other.
The fan draws quite some current, not a good idea to chase this through the radiator!
Sure, if you want to DIY or add a relay or.... suit yourself.
Btw, it also is too cold, is must be close to the thermostat-opening temperature.
Best is to aim for some 92-95C, which is cooler than the OEM switch, on a 2018 Husky 701 some 106C!