1. 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

Iridium IX Spark plugs 449-511

Discussion in '4 Stroke' started by Tinken, Dec 10, 2012.

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  1. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    Hundreds of happy riders have proven it's no problem. As long as you leave the connector in place that runs the 2nd Butterfly actuator, the ECU doesn't know the difference. I removed the O2 sensor years ago as it only works with Map1 (aka jumper removed)
    Huskynoobee, Feb 27, 2017
    #61
    HuskySnake likes this.

  2. Dangermouse449 Husqvarna
    Pro Class

    Location:
    Sunshine Coast QLD Australia
    Husqvarna Motorcycle:
    2011 TE449
    Other Motorcycles:
    2009 CRF450R 2000 YZ125
    The EFI makes corrections to the tables based on the MAP sensor as well as all the other sensors (TPS, Coolant, air temp etc)
    With the secondary butterfly in place, the MAP sensor still sees a partial vacuum when the main throttle is opened and adjusts fuelling to suit.
    Even with the 2nd butterfly removed, the ecu sees whatever manifold pressure there is based on the MAP sensor and adds fuel accordingly.
    Dangermouse449, Mar 1, 2017
    #62
    HuskySnake likes this.

  3. Max449 Husqvarna

    Husqvarna Motorcycle:
    TE449
    Other Motorcycles:
    GasGas 300
    Hi Dangermouse
    I removed the second butterfly on my TE 449 Supermoto but still have the idle roller arm installed...
    would u recomend to also remove it?
    can u tell me if the fuel/air ratio is impacted by removing the second butterfly?
    Im a bit scared to just test it full power on the streets...
    dont want something unecpected to happen and to fly out of a turn :)

    THX man apreciate it
    Max449, Sep 12, 2020
    #63
    Big Timmy likes this.

  4. Big Timmy Husqvarna
    Pro Class

    Location:
    (South Eastern) AZ.
    Husqvarna Motorcycle:
    2015 FE 501 with lots of goodies.
    Other Motorcycles:
    BMW G450X, 15'FE501, 23 KTM 1290 SAR
    Take out the second butterfly and remove the swedged lug on the idle roller pulleys arm as well.
    The AFR will have nothing to do with that mod, it has everything to do with what map you are running.
    Go to Map 3 also known as the Akro map is recommended.
    Tune ECU is your friend for this.
    Unless you are running a PC 5.
    Big Timmy, Sep 12, 2020
    #64

  5. Max449 Husqvarna

    Husqvarna Motorcycle:
    TE449
    Other Motorcycles:
    GasGas 300
    Thx man
    Now I feel safe to send it again
    Max449, Sep 18, 2020
    #65
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