Over heating '10 fe570

I and other people overheat our bikes from time to time to the point of steam rising from overflow from the rads.

Mostly getting stuck in a difficult section going too slow to flow air over the rads.

We install fan kits. Mine was just installed. If the dealer ever sorts out this new problem with the coolant sensor (now thought to be the ECU) then I will get to go out and try it out, but I anticipate it will help a lot.

The Husabergs and KTMs overheat easily due to small radiators.
They also spit coolant if the fluid is too high, it should be just covering the fins.
A catch tank is a good idea so the fluid does not get lost and a fan keeps airflow on the radiator at slow speeds.
Turn the bike off when not moving!
Enjoy the bike!

Sounds normal. Install the fan kit. Its money well spent.

nick790 said:

Looks like I'll be buying a fan kit then. Anything else I can do to keep my Burg cool?

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In addition to the fan replace the stock silencer with one that is more free flowing. Stock silencer causes the bike to retain a lot of heat.

First time out today with my fan kit and it did come on. I didn't get to ride the one trail that I always overheat on, but between the exhaust wrapping and the fan kit, I did notice noticeably less heat coming off the engine.

I got the 50 foot roll from DEI - still a lot of it left over. Probably enough (and then some) to do another bike.

nick790 said:

Thanks for the quick reply. How hard was thar mid pipe to get off? What temp does the fan cut in? Any advantage in an override switch?

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I didn't do the wrapping myself. I don't have a good place to work on my bike, especially with winter approaching (I have a carport that has several inches of standing water in it when it rains and that is it) and I had a bunch of stuff I wanted to get done:

Fan kit
Header wrap
Subframe tank
Rad braces
Suspension re-sprung/re-valved
Check the valves

So I just dropped it off at the dealer and let him do all that while I sit at my computer at home and earn the money to pay for it to be done. It is an equitable trade since I can earn the money faster and easier than I could do the work on my bike even if I had a good shop and tools. Besides, although I don't mind working on bikes, I used to be a prof. diesel mech and I just don't get much enjoyment from working on mechanical things anymore - BTDT.

So I don't have an answer for your questions.

I really like the results though. I don't think I would see an advantage in an override switch. The fan is turned on via a sensor in the bottom of the rad. I am sure someone here knows what temp it turns on at, but my guess is that maybe you could get a different sensor if you didn't like the temp of the one that comes with the kit.

nick790 said:

Thanks for the quick reply. How hard was thar mid pipe to get off? What temp does the fan cut in? Any advantage in an override switch?

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You have to remove the tank and shock. Remove the subframe bolts and lay it to the side. Be patient and removing the mid pipe is not that bad. When wrapping the pipe wear gloves and long sleeves has it's fiberglass impreganated. Wetting the wrap makes it easier to handle, less fiberglass floating about and dries tighter.

nick790 said:

What temp does the fan cut in? Any advantage in an override switch?

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Fan switches on at 100c. Check out this post:
viewtopic.php?f=6&t=12605

I can't see any advantage in an overide switch because the factory fan works perfect

Hi: My FE450 `09 was overheating all the time. Water was boiling like it wasnt ´flowing properle. After lot´s of theories and mistakes trying to fix the problem the dealer got it. The problem was that the helix (airscrew, propeller) of the water pump which was damaged.
Maybe you should check that if you here water boiling inside the motor or the water system all time.
Greetings.

SC

Hi There,

I have experienced similar over heating problems on KTMs and Bergs over the years and regularly race and ride my berg in all sorts of hot conditions. One of the things to check is the Thermostat, if this is not working properly one side of the bike will continue to overheat while there is still a lot of coolant in the system and the waterpump can also overheat and puke through the expansion hole. Unfortunately KTM keeps using ****** thermostats, I have replaced them on all my bikes and it makes a huge difference. The Radiator cap is another thing that can 'just give out' not keeping enough pressure in the system giving the effect of overheating when in fact its not. The fan is great for ultra tight slow going conditions, otherwise the bike is designed very well to keep cool. Ifyou do pull the thermostat just remove the inner component, the outer ring is needed to re-seal the unit.

Cheers, Digs.

KTM as made a change to the radiator caps between 2009 and 2010, all 2010 and newer should have a 1.8 cap. You can order the cap for older models, it interchanges. Also if your interested in keeping the coolant in the radiator, Evans cool which is not a water based coolant boils at a much higher temperature than anything else that I am aware of. I tried Engine Ice and several other supposed supper coolants prior to going with it. If you are going to switch, make sure you get as much of the original coolant out of the system before refilling it. Just picked up a 2010 FX 450 and have not had much hot weather time on it yet. I do mostly GNCC and National Hare Scrambles so anything I can do to stack the odds in my favor for durability is a plus.