1. 4 Stroke Husqvarna Motorcycles Made In Austria - About 2014 & Newer
    FE = 4st Enduro & FC = 4st Cross

FE/FC My new FE 350!

Discussion in '4st' started by SM113, Nov 1, 2014.

  1. Aaron platt Husqvarna
    A Class

    Location:
    Central Oregon
    Husqvarna Motorcycle:
    17 TX300, 17 FE450
    Other Motorcycles:
    16 Beta EVO 300
    The price initialy set me back when I bought the XF2 coolant. Now I won't use anything else. Overheating is a thing of the past and the stuff won't freeze. It doesn't corrode anything in the motor and the lower pressures are easier on seals and hoses. The half gallon container will typically do two bikes also.
    Tinken likes this.
  2. bikesparky Husqvarna
    AA Class

    Location:
    Townsville Oztrailia
    Husqvarna Motorcycle:
    FE501
    Other Motorcycles:
    Superduke 1290
    Removing the thermostat doesn't always results in better cooling. Too fast a flow and the liquid doesn't have time to absorb the heat and works counter productive.
    We tried this on a race engine with and electrical water pump. it has the benefit that it doesn't run when not needed and the speed can be accurately tuned for the required temperature.
    With engine at max output and the pump at full bore it actually cooled the engine less then backing the pump off to 3/4 speed. Logic would disagree with this but the real life results where there.
    Also very bad to run a aluminium engine too cold as the best way is uniform temperature spread around the complete cylinder and head assembly. Thermostat helps with that.
    I do agree that most thermostats now are a bit on the excessive high temperature end, this die to emissions and so on. Changing it to a lower temp unit might be better than removing it and also lowering the temp the fan comes on.
  3. reveille Husqvarna
    Pro Class

    Location:
    Northern Illinois
    Husqvarna Motorcycle:
    2014 FE501
    Other Motorcycles:
    2015 300 XC W
    I run the same thermostat setup on my FE that comes stock on the FC;)
    bikesparky likes this.
  4. Tinken Husqvarna
    Pro Class

    Location:
    Hesperia, CA
    Husqvarna Motorcycle:
    MY12 WR511
    Other Motorcycles:
    Yamaha
    Typical motorsports coolant systems are about 1 quart. The coolant need only sit at the top of the core elements or 4mm above. The space is needed for thermal expansion.

    This is actually not true, but is a common misconception. I can and had to prove this through mathematical calculation to the current administration here at ZipTy for the exact same argument before they would move forward to creating XF2. My thermal heat calculations are all based upon the change in temperature (^T) and the rate of coolant (meters/second) W/m-2K/s (watts per meter squared kelvin per second). This is why XF2 out performs coolants which are higher viscosity such as Engine ice See graph below. A experiment would be to place an air obstruction in front of the radiators in order to slow the air down and allow it to have longer contact. Commercial drivers do this to increase the temperatures during winter months.

    [IMG]

    I suspect the reason behind the heat change in some instances is because of cavitation. This is a huge problem when cooling at high rates speed. XF2 has very little cavitation due to its very little water content.

    Thermostats are used based upon water which has a higher specific heat. It takes longer to heat water up. XF2 is different in that it heats very rapidly and it can release that heat energy very fast. So even an aluminum engine with XF2 will heat very rapidly and maintain a constant temperature for light or heavy loads.
    bbc, bikesparky and SM113 like this.
  5. Weantright Husqvarna
    AA Class

    Location:
    Burton, Oh
    Husqvarna Motorcycle:
    2019 FX350 w/KYB Inserts
    Other Motorcycles:
    2017 FE250 w/OC, 2016 XTrainer w/KYB
  6. SM113 Husqvarna
    B Class

    Location:
    Oregon U.S
    Husqvarna Motorcycle:
    Soon to be 2015 FE 350
    XF2 is what I run I love the stuff!!!

    Well checked the valves again today, a little early for the 2nd check but it's at 28 hours and 581 miles.. And once agai. Valves where perfect . And I have to say are pretty easy to check, maybe not as easy as some of the Japanese bikes... But a have worked on and adjusted worse
  7. troy deck Husqvarna
    Pro Class

    Location:
    Republic MO
    Husqvarna Motorcycle:
    87 250wr 12 cr125
    Other Motorcycles:
    kx65 ty80 rm80 kdx250
    MAN I HATE IT WHEN TINK TURNS ON HIS BIG BRAIN MY OL WOOD BURNER CANT KEEP UP
  8. bikesparky Husqvarna
    AA Class

    Location:
    Townsville Oztrailia
    Husqvarna Motorcycle:
    FE501
    Other Motorcycles:
    Superduke 1290
    It does make sense however if XF2 is able to absorb heat quicker there can be faster flow, more heat release in the radiators and better cooling.
  9. endurocrotts Husqvarna
    C Class

    Location:
    Arizona
    Husqvarna Motorcycle:
    2015 Husqvarna FE 350
    Other Motorcycles:
    2014 Sherco 2.9, 2014 BMW 1200 GSW
    Picking up my FE 350 on the 17th of March. Lots of good info in this thread. Going to get the dealer to load the euro map. Have any of you guys had this done? What are the benefits?
    Thanks
  10. reveille Husqvarna
    Pro Class

    Location:
    Northern Illinois
    Husqvarna Motorcycle:
    2014 FE501
    Other Motorcycles:
    2015 300 XC W
    Had halls do it to my 501. Bike runs smoother and cooler. Don't hesitate to have it done. I also run the trailtech switch to cycle between 3 maps. Once the ecu is unlocked and the euro map is installed it allows you to change maps on the fly.
  11. endurocrotts Husqvarna
    C Class

    Location:
    Arizona
    Husqvarna Motorcycle:
    2015 Husqvarna FE 350
    Other Motorcycles:
    2014 Sherco 2.9, 2014 BMW 1200 GSW
    Thanks for the info. I'll look into the TT switch. Assume it plugs in under the gas tank on the left side?
  12. reveille Husqvarna
    Pro Class

    Location:
    Northern Illinois
    Husqvarna Motorcycle:
    2014 FE501
    Other Motorcycles:
    2015 300 XC W
    Plugs in near battery,ecu area. Mine replaces the kill switch and incorporates it into the unit. Very easy install. Sicass racing
  13. endurocrotts Husqvarna
    C Class

    Location:
    Arizona
    Husqvarna Motorcycle:
    2015 Husqvarna FE 350
    Other Motorcycles:
    2014 Sherco 2.9, 2014 BMW 1200 GSW
    Thanks for the info, I'll have the dealer install a switch we he remaps.