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May 21st, 2008, 06:58 PM   #1
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Thermostat?

I noticed that my FS650e has a thermostat but the FS650c does not. Is it needed? Why does the e have it and c doesn't?
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May 21st, 2008, 08:30 PM   #2
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RE: Thermostat?

my understanding of the thermostat is really only for one purpose...it speeds up the time it takes for the engine to reach operating temp, thereby meeting emissions sooner (a cold engine is a dirty engine in terms of emissions). The C doesn't have it because its a closed course race machine and on-road emission laws don't apply there.

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May 22nd, 2008, 03:32 AM   #3
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RE: Thermostat?

Supermotomike,

I also worried about that and I am thinking to remove it becouse I use my berg only on corse.If you also use your berg on corse,try it.Just have attention in engine warm up twice if you remove it,because as nizzo said the thermostat "speeds up the time it takes for the engine to reach operating temp".

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May 22nd, 2008, 03:41 AM   #4
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if it was my bike i would leave the thermo in , it allows a slower flow rate giving better cooling efficiency
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May 22nd, 2008, 06:34 AM   #5
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one more quick point on this subject...if you decide to remove it, I strongly recommend removing the hoses along with the stat. Then install the two simple hoses same as on 650C or FC models. If you just remove the stat and keep the by-pass hose, the coolant can continually by-pass the engine and you may overheat.

Also if you ride in the winter, removing the stat and by-pass hose is a very good idea...I have seen guys sieze motors by running a stat at below 0*C temps.
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May 22nd, 2008, 06:38 AM   #6
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Originally Posted by whosahberg
if it was my bike i would leave the thermo in , it allows a slower flow rate giving better cooling efficiency
Then why did the FC models not have thermostats?

Have you ever seen any aftermarket stuff for motorcycles that slow down the flow rate so the bike cools better? Nope, everything is high-flow impellers and high flow water pump covers, etc.

I don't buy the slow flow theory, especially when most of my problems on my overheating Husaberg went away after I went to the FC style set up. That is just my personal experience.
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May 22nd, 2008, 06:52 AM   #7
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Johnf3,

I think what Whosaberg is trying to say is that slowing down the flow allows the coolant to pick-up more heat. If the coolant flows too fast it can pass thrrough the engine without picking up the neccesary heat...then you could be back in an overheat situation. Coolant flow (speed) is one critical dynamic factor to consider when designing a cooling system.

But generally the Berg cooling system is designed to remove all the heat we can give it at slow speeds (unless we violate the clutch for long periods). I agree...put the FC hoses on and call it good (just don't let the EPA stick a probe in your tail pipe when the motor is still cold.
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May 22nd, 2008, 07:39 AM   #8
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Originally Posted by Johnf3
Originally Posted by whosahberg
if it was my bike i would leave the thermo in , it allows a slower flow rate giving better cooling efficiency
Then why did the FC models not have thermostats?

Have you ever seen any aftermarket stuff for motorcycles that slow down the flow rate so the bike cools better? Nope, everything is high-flow impellers and high flow water pump covers, etc.

I don't buy the slow flow theory, especially when most of my problems on my overheating Husaberg went away after I went to the FC style set up. That is just my personal experience.
ask dale lineaweaver what he thinks ... thats where my info comes from

why did husaberg give the 05 and on fe models thermos when the 04 models had none
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May 22nd, 2008, 07:46 AM   #9
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Thanks for the guys. I was curious when I noticed the difference in the spare parts book between the two models.
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May 22nd, 2008, 09:32 AM   #10
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I remember in older topic that Dale Lineaweaver recomended to leave the thermostat,but I think that the guy who asked,had an enduro and not a supermoto or motocross.I think that this is the point.The factory knew something more when decided to install thermostat only in enduro and street legal supermoto.I dont remember seeing any factory Husaberg supermoto with thermostat the last October here in Greece.The fact that those engines are really pressed to their limits whithout having thermostat,force me to think that for supermoto racing use or corse use only,the FE or FS c hoses are not a bad idea,in my opinion specially the HOT period.I would leave the thermostat if I used my Berg for road use

Regards sotosberg
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