Guys,
are the radiators on the new FX the same as what KTM has been using for the 09/10 bikes?
are the radiators on the new FX the same as what KTM has been using for the 09/10 bikes?
thanks for the reply, gents.... a friend of mine with 09 FE 390 has experienced some over heating issues like my FX 450, and has started using EVANS fluid in his coolant system.. he rode this past weekend in a scramble, in mid 95 degree weather, and did not boil in the slow tight stuff... I have been a little skeptical of the Evans, due to its ultra high boiling temperature (250 degrees or so), as I was thinking if I got bike hot enough to cook this stuff out, it would do a LOT of damage to the machine... but everyone that runs Evans likes it, and has no issues... anyone else out there familiar with this stuff?
Go to the cooling system forum and do a search for Evans.
Been running it in my 04 550 for a long time, the EPGr. The only draw back with it is that it is not recommended for temps below freezing. Although I have used it in the teens before. And you can't be an idiot and use this stuff. In a pressurized system it won't boil until 400 degrees, so you have to use your head a little.
I used it in my 04 550 b/c I couldn't put a fan on my bike, and even though it runs about 20 degrees warmer than regular glycol/water coolant, it stayed in the bike.
It also has the advantage of running at or near zero pressure.
However, with a little bit of home work, and a trip to the radiator shop you can get a fan on your FX which is the best way to go. Just get the fan kit for the FE's, and have a bung welded into your radiator so you can use the stock temp switch.
Been running it in my 04 550 for a long time, the EPGr. The only draw back with it is that it is not recommended for temps below freezing. Although I have used it in the teens before. And you can't be an idiot and use this stuff. In a pressurized system it won't boil until 400 degrees, so you have to use your head a little.
I used it in my 04 550 b/c I couldn't put a fan on my bike, and even though it runs about 20 degrees warmer than regular glycol/water coolant, it stayed in the bike.
It also has the advantage of running at or near zero pressure.
However, with a little bit of home work, and a trip to the radiator shop you can get a fan on your FX which is the best way to go. Just get the fan kit for the FE's, and have a bung welded into your radiator so you can use the stock temp switch.
There is also a kit for certain KTM 300's that has a fitting that goes into a radiator hose for the thermostat. That way, no work necessary on the radiator.
hi guys.there is a fan kit available from your dealer specified for the fx.the stat goes in the hose so no need to cut & weld rad.regards htm
Right you are! Thanks HTM.
Look at the bottom of this page: http://www.husaberg.com/PowerParts.250. ... id=+2301J0
Look at the bottom of this page: http://www.husaberg.com/PowerParts.250. ... id=+2301J0
ls1yj said:
all models have a reflash, 09s and 2010s, that will really reduce the amount of overheating. It really inproved the lowend on my 570, and made pull smoother in the transition
Just throwing this out there, but it seems to me that a very high boiling point would really hinder cooling of hot spots in the engine.
When an area gets locally hot like on the head near the exhaust valves, coolant boils on that spot and the bubbles are scrubbed away by the quickly moving coolant, where they recondense again. The process of local boiling and scrubbing removes a lot of heat from hot spots. Just some Kevin Cameron type stuff I recall reading.
When an area gets locally hot like on the head near the exhaust valves, coolant boils on that spot and the bubbles are scrubbed away by the quickly moving coolant, where they recondense again. The process of local boiling and scrubbing removes a lot of heat from hot spots. Just some Kevin Cameron type stuff I recall reading.
Joined Oct 2005
935 Posts | 21+
Texas
Duken4evr said:
That is opposite of what I have read--"nucleate boiling" like you describe hinders heat transfer. Plus, once your coolant starts to boil, more than likely you are on the way to boiling over. Now I may not be as smart as Kevin Cameron, but I am fairly certain that coolant on the ground doesn't cool as good as Evans in the radiator, especially when you are on a remote section of single track with no way of refilling your radiator.
I run a Trailtech Voyager GPS on my FX, which has a temperature gauge to keep track of what my coolant is doing. I do not run a fan, and do not need to with Evans. I ride in some flat out nasty and technical single track (other bikes I am riding with are boiling away), and I have not approached dangerous operating temps yet. These bikes can easily handle 230-240 degree water temps, which is where normal coolant starts to boil and boil out. The Evans handles these temps easily. I won't ever have anything else in my FX's radiator. I do recommend a temp gauge to monitor what is going on, since it has such a high boiling point.
Thanks for your feedback John. Evans is interesting stuff. I had not heard of it before and did some research. I really like the long lasting and waterless nature of it. Seems like corrosion and pressure to the cooling system would be greatly reduced, which are good things.
Amazon has it for $35 a gallon. That is not bad at all, considering the benefits and longevity of it. I am sold
Amazon has it for $35 a gallon. That is not bad at all, considering the benefits and longevity of it. I am sold
Joined Oct 2005
935 Posts | 21+
Texas
Duken4evr said:Thanks for your feedback John. Evans is interesting stuff. I had not heard of it before and did some research. I really like the long lasting and waterless nature of it. Seems like corrosion and pressure to the cooling system would be greatly reduced, which are good things.
Amazon has it for $35 a gallon. That is not bad at all, considering the benefits and longevity of it. I am sold
I am using the NPG+, just fyi. It is what is recommended for our bikes by Evans. Try it, I think you will like it. :rock:
Edit: Now (new) on Evans website they say to use the "R" instead of the "+". I have had no issues running the "+".
Joined Apr 2002
3K Posts | 11+
Phoenix Arizona
As Dale brought up. Evans is good stuff. You just have to be smart with it. Just because it's not boiling over doesnt mean it's not ready to melt the water pump seals out of it or seize. If there is any way to mount a fan, do it. If your running hot enough that you need to run Evans, you need to run a fan.
Joined Oct 2005
935 Posts | 21+
Texas
That's not necessarily true at all. The limiting factor would be oil temperature, where anything above 250 degrees for an extended period is too hot. As I said, I monitor my coolant temperature with a temp gauge, so I think I have a pretty good handle on whether I need a fan or not.berger said:
I ordered the Evans and already have a fan kit anyway. I ride high elevation (up to 13,000 feet here in CO) it is not usually hot up there, but the air is thin and as a result, it does not cool as well. The trails I ride up there are hard core rocky and steep too.
I may put the Evans in my FZ1 street bike as well, since the OEM coolant is ready to change due to time in the system. Sheesh. Look how expensive you guys are to hang around
I may put the Evans in my FZ1 street bike as well, since the OEM coolant is ready to change due to time in the system. Sheesh. Look how expensive you guys are to hang around
Joined Apr 2002
3K Posts | 11+
Phoenix Arizona
For what it's worth, coming from the land of REALLY FREAKIN HOT. I have run a fan kit on the 570 since new. I boil the fuel often, but never the coolant. Never added a drop to the cooling system in 2 years.
I did need to run fans and Evans in my 650's though when running single track in the summer months. My 04 before the Evans was known locally as the "Husa-dragon" for all of the steam it beltched. That bike carried cheeseberger to his first Baja 1000 finish.
I did need to run fans and Evans in my 650's though when running single track in the summer months. My 04 before the Evans was known locally as the "Husa-dragon" for all of the steam it beltched. That bike carried cheeseberger to his first Baja 1000 finish.
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