I bought a used '10 FE 450 in early December. Several weeks ago I purchased and installed the Husaberg Fan Kit. I havent been able to ride on the trails yet here in Colorado due to snow and cold weather. Nonetheless, after installing the kit and running the bike in the driveway to see how long it takes to get the fan to turn on, I felt like it the OEM switch did not turn on soon enough (bike had to get real hot). I found a replacement switch that turns on at 95C and turns off at 90-91C (at least that is what is marked on the actual switch. I think the KTM/Husaberg OEM spec is something 100C/95C or 102/97C.
I had read here or elsewhere that you can use the fan switch from an '84 BMW 325E. I have recently ordered a number of items from www.rockauto.com
and been really impressed with their cheap pricing and their quick delivery. So, I went looking for what was available from Rock Auto. They list over a dozen stock switches available for this model with a couple special order ones as well.
If you go to their catalog (www.rockauto.com
), click on start button, click on BMW, 1984, 325E, Electrical Switch & Relay, and then choose Radiator Fan Switch to see the available listings. The prices of the switches range from $4.45 to $24.79 for the stock items (with various brands and on/off temperatures). Be sure to get the TWO prong temperature sensor. They incorrectly show 1 item with a 1 prong connector among the choices.
I ended up picking up the Beck/Arnley 2011310 switch which is a 95C/91C switch. Cost was $13.65. Shipping to my zip code (Denver, Colorado) was $1.61. The Beck/Arnley 99C/95 switch (2011312) is $5.75 with $1.64 shipping.
There are several other brands that you may like better with varying temp specs (and some are hard to tell the exact specs unless it mentions in the description).
Here is the link: http://www.rockauto.com/catalog/raframecatalog.php
I can assure you the Beck/Arnley switch I purchased (2011310) is an exact fit/copy to the 2010 OEM switch with the exception of lower on/off temp.
FYI....I know it sounds like a sales pitch above, but I have no affiliation with Rock Auto. I have used them about 5-6 times for auto parts and have been impressed every time with the speedy delivery and what seems like reasonable prices. But, I didnt scour the internet looking for the absolute lowest price. For all I know some other places have it cheaper, but I wanted to offer this one up as an option.
This radiator fan switch is also not unique to one model BMW. They list about 21 different BMW models that it fits all with multiple years. I dont believe the year/model listed earlier in this thread was one of them, but I am not absolutely sure.