640 Adv DUAL radiator fans guide - Page 6

Lear60man · 09-22-2009, 01:24 PM

Update. Install was stupid easy. Hard wired it to the battery with an on off switch on the handlebars. Noticeable difference as the temp drops immediately. Does anybody know if the thermostat that comes with the kit is the lower temp thermometer?

ChrisC · 09-22-2009, 01:52 PM

Quote:

Originally Posted by Lear60man

Update. Install was stupid easy. Hard wired it to the battery with an on off switch on the handlebars. Noticeable difference as the temp drops immediately. Does anybody know if the thermostat that comes with the kit is the lower temp thermometer?

I was going to try to retrofit the older 85 deg C thermoswitch. When it came I found it to be for the older style, smaller bung in the radiator. So I capitulated and wired in a manual override switch (still on one fan though)...

makazica · 02-01-2010, 09:17 AM

Would somebody be willing to teach me how to wire a second fan so I can also mount a switch....in order to manually control the second fan....??

Sorry, I'm an electrical idiot......

sellmeyer · 02-01-2010, 02:40 PM

can anyone provide me with the approximate size of each radiator on the 640 LC4?

I'm currious how they might work on a BMW F650GS single, which has a single, thin radiator which is 25% blocked by the main frame...I was thinking about looking for a custom pair of radiators but figured they would cost too much.

Maybe a pair from the KTM would be suitable and a cheaper option than custom?

-also, can anyone tell me why these engines are running so hot? I know the fan kicks in quite a bit on my bike, but maybe the Rotax does run as hot as the LC4 and can thus get away with a smaller radiator?

-thoughts?

boney · 02-01-2010, 04:22 PM

Quote:

Originally Posted by sellmeyer

can anyone provide me with the approximate size of each radiator on the 640 LC4?

I'm currious how they might work on a BMW F650GS single, which has a single, thin radiator which is 25% blocked by the main frame...I was thinking about looking for a custom pair of radiators but figured they would cost too much.

Maybe a pair from the KTM would be suitable and a cheaper option than custom?

-also, can anyone tell me why these engines are running so hot? I know the fan kicks in quite a bit on my bike, but maybe the Rotax does run as hot as the LC4 and can thus get away with a smaller radiator?

-thoughts?

Another option, for those who aren't into spending money on another fan is to piggyback a pair of wires to a switch in your cockpit. Just run two wires connected to a switch on your handlebars or wherever down to the thermoswitch. At the south end of the wires attach some piggyback connectors:

Disconnect the two stock wires from the thermoswitch, plug in your new wires (with the piggyback connectors) then re-attach the stock wires onto the piggybacks. Now you have manual control of your fan, which will still work via the thermoswitch normally if you haven't manually activated it.

In my experience, if I turn the fan on early, I don't need a second fan. The key is to get air flowing asap when your speeds get low. Your mileage may vary.

meat popsicle · 02-02-2010, 08:55 PM

Quote:

Originally Posted by makazica

Would somebody be willing to teach me how to wire a second fan so I can also mount a switch....in order to manually control the second fan....??

Sorry, I'm an electrical idiot......

there have been a few wiring diagrams over the years posted... was it on this?

dig, dig, dig...

This one enough?
http://www.advrider.com/forums/showp...6&postcount=70

9Toes · 12-29-2010, 09:09 AM

Just for feed back fitted fan as per right had side but wired into the unused power lines for the factory fitted road book plug just above the lights. Just not the brightest as I added the road book a year earlier and hard wired that into the 12 V aux socket. I just couldn't figure what fuse I would require, but in both cases hoping that both are fused to main box at battery.
Fan works fine on manual toggle.

Someone with some sense of electricity can let me know how dump this is or is piggybacking ok ?

Cheers

wrk2surf · 02-09-2013, 07:17 PM

just a bump for a good thread.. is it in the lc4 thread ??

meat popsicle · 02-11-2013, 05:59 AM

Quote:

Originally Posted by wrk2surf

just a bump for a good thread.. is it in the lc4 thread ??

'tis

02-01-2010, 02:40 PM	#79
sellmeyer Gnarly Adventurer Joined: Mar 2007 Location: Aspen, Colorado USA Oddometer: 387	looking for dimensions of the radiators can anyone provide me with the approximate size of each radiator on the 640 LC4? I'm currious how they might work on a BMW F650GS single, which has a single, thin radiator which is 25% blocked by the main frame...I was thinking about looking for a custom pair of radiators but figured they would cost too much. Maybe a pair from the KTM would be suitable and a cheaper option than custom? -also, can anyone tell me why these engines are running so hot? I know the fan kicks in quite a bit on my bike, but maybe the Rotax does run as hot as the LC4 and can thus get away with a smaller radiator? -thoughts?

12-29-2010, 09:09 AM	#82
9Toes Adventurer Joined: May 2007 Oddometer: 35	Its a worry Just for feed back fitted fan as per right had side but wired into the unused power lines for the factory fitted road book plug just above the lights. Just not the brightest as I added the road book a year earlier and hard wired that into the 12 V aux socket. I just couldn't figure what fuse I would require, but in both cases hoping that both are fused to main box at battery. Fan works fine on manual toggle. Someone with some sense of electricity can let me know how dump this is or is piggybacking ok ? Cheers __________________ Bothy,Angus, Scotland. KTM 640 Adv & GS 1200

02-09-2013, 07:17 PM	#83
wrk2surf BITD/Rallye Joined: Dec 2007 Location: THE exact center of California/Bass lake/Yosemite Oddometer: 5,307	just a bump for a good thread.. is it in the lc4 thread ?? __________________ Thanks for the 2013 support: DUNLOP, BELL HELMETS, Kriega USA, Carbon-pro.com, Ride 100% Goggles, Renazco Racing, Sidi/Motonation, Acerbis USA,KLeN, FMF, Mx1west,,Masters paint and body, Magura , motolab ,and Freedom Cycle

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09-22-2009, 01:24 PM	#76
Lear60man Sleeping Joined: Nov 2007 Location: So Cali Oddometer: 714	Update. Install was stupid easy. Hard wired it to the battery with an on off switch on the handlebars. Noticeable difference as the temp drops immediately. Does anybody know if the thermostat that comes with the kit is the lower temp thermometer?

02-01-2010, 09:17 AM	#78
makazica Studly Adventurer Joined: May 2008 Location: Zagreb, Croatia Oddometer: 705	Would somebody be willing to teach me how to wire a second fan so I can also mount a switch....in order to manually control the second fan....?? Sorry, I'm an electrical idiot......