EX-2 ST2 w/KR-241FH

No. 80657
End of production

EX-2 with Drop Extension Steering Unit2(ST2)


#Dimensions: 240×163×107mm  
#Weight: 528g ( Not included battery)
#Current: 150mA RO3/AAA/UM4 battery x 4
#Using time: 6hours ( It may change by a kind of battery in use.)
#40 Model Memories.
#Micro receiver KR-211FH included.
#Other Compatible receivers: KR-418FH,KR-415FHD,KR-413FH,KR-241FH,KR-211FH,KR-212FHG.

*This products does not include the Manual in the package. Please download manual from here. (Manual is same as EX-RR ver2.0 software. But Grip Unit is different at EX-RR and  EX-2, please attention this difference.)


Made in Japan.


  • Drop down extension Unit 2 are installed.

    Superior durability and operation feeling led by new angle sensor.

    We adopt new angle sensor which was particular about the durability and the feeling of operation for both steering and throttle. Prevents deterioration of durability and operational feeling due to wear, which can be said to be the problem of contact sensors. Along with smooth operation feeling by smoother sliding, we realize high durability that is approximately 100 times compared with the prior sensor. Therefore, the best feeling of operation can be maintained for a long time. In addition, the new sensor outputs a more linear signal to the Master Unit. You can control the ESC and servo with a detailed operation sense. A realization of a sense of unity between people and cars.

    Increased the number of ball bearings that support the steering shaft for higher accuracy!

    Increased the number of ball bearings that support the steering shaft for higher accuracy!
    The number of ball bearings supporting the steering shaft has been increased from one to two. The double-support type supports higher precision operation and reliability.

    The soft spring which can be operated with a constant tension.

    The normal spring included in the extension unit has been modified. The previous spring used was a progressive spring becoming stiffer as the wheel angle increased, but the new softer spring give a linear stiffness as the wheel angle increases. Since the spring tension can be adjusted, you can set the spring tension to your personal preference.

    Ver2.0 software installed. ( same as EX-RR)

    This product are changed software to Ver2.0. It is same as EX-RR Ver2.0.
    This update are for product that shipped after Aug of 2018.
    Also customer are able to updating EX-2. Please see update infromation page for detail.


    Calculator has rollout calculation.


    This new function has been added to the calculator in the EX-2. Put TYRE DIAMETER in the calculator, ROLLOUT( Car movement distant per one motor rotation ) is automatically calculated. This is useful for changing gearing in a DD car.







    New Push Control Function for Direct drive car.


    A motor that has a strong magnetic force will add a braking effect when the throttle is released and will make a car stall in the corner. Setting the amount of forward input to remain on the throttle as the trigger returns to neutral can be adjusted. This is effective for F1, WorldGT and 1/12 category of cars whose gear ratio is small.






    English⇔Japanese language change is possible in the menu.


    You can change language in the display from Japanese and English. Selecting the display language that you prefer to use.








    Incrased Model memory to 40.

    Model Memory of EX-2 were 20 model momories.
    In the Ver2.0 Software, Model memories icreased to 40. You can save many setting for your situation.


    Adding various performance functions such as down timer and more.

    #Individual response settings for the steering and throttle.( Feel setting menu)
    #Display RF mode (FH-G/ FH-F /MzMHS G/MzMHS F)
    #2 way setting point in the Steering Speed.
    #3 way Setting point in the Throttle Speed.
    #Full acceleration settings.
    #Full ABS Settings.
    #Balance L/R added in the Steering override.
    #Add User timer.
    #40 model memory.

    *This photo is screen of Down Timer




    High performance CPU &2.7inch LCD
    Using a similar CPU to the EX-1 provides a super linear and fast response. Each menu is displayed like an icon to make it easy to search and the new menu tree is useful for setting up to 20 vehicles.




    Two LCD Positions90 Degrees Conversion
    The LCD screen can be placed in two directions for a preferred viewing position.

    Compact and Light Weight Master Unit
    The Master Unit is lighter and the re-newed design achieves a new weight balance. The EX-2 is very compact and light weight making it very useful for your use.


    Trigger Position Adjustable  3D trigger feature
    Using KO's unique 3D trigger and trigger position adjustment allows for comfort for all hand and finger sizes.




    EX-2 Short Antenna
    The new short antenna design reduces obstructions and performance offered is very linear and connected to the system.

    K.I.Y Optional Parts Compatible
    Utilizing the Patented K.I.Y system allows for Steering Units, Grip Units, Battery Stand and Grip Pads to be used with the EX-2 as upgrades to your system.



    Xpansion Manager software
    You can use our xpansion software for setting. 



    Model Select / Model Name / Model Copy / Model Reset / All Reset

    Display / Battery / Calculator / Sound / VR Information / Config / Key Speed / Menu Speed / Language / Operation time / User timer

    Steering Travel / Steering Balance / Steering Trim/Steering Sub Trim / Steering Trim rate / Steering Speed Turn(2way) / Steering Speed return (2way) / Steering Curve / Steering Punch / Steering Feel / Steering Response / Steering Auto Trim / Steering Auto Balance /Steering Reverse

    Throttle travel F / Throttle travel B / Throttle Trim/Throttle Sub Trim / Throttle Trim rate / Throttle Speed Turn(3way) / Throttle Speed reTurn(3way) / Throttle Curve / Throttle Punch / Throttle Feel / Throttle Response / Push Control/ ACCEL / ABS / Auto Start / Idle Up / Neutral Brake / Throttle Override / Throttle Reverse

    KEY Setting / 2WAY / 3WAY / 5WAY / ANALOG / Gyro / Twin Servo / 4WS/AMP Mixing / Throttle Mixing / Trim Set

    Timer Start / Trigger Start / Lap history / Start Stop Key / Lap Key / Lap Navi / Alarm time / Pre Alarm / Alarm Mode / Timer Mode (Lap Timer/Down Timer)


    ・Master Unit EX-2 x1
    ・Xpansion Unit(ver2.12 firmware) x1
    ・Drop Extension Steering Unit2 x1
    ・Basic Grip Unit x1
    ・Normal stand Unit x1

    ・KR-241FH x1

  • Drop Extension Unit2

    End of production
    No. 10645

    3D Extension Unit for KIY

    End of production
    No. 10501

    ST Unit Stick Type for KIY

    End of production
    No. 10502

    Battery stand Unit

    End of production
    No. 10546

    ExpertGrip (left)

    No. 10527

    Expert Grip Unit2(right)

    End of production
    No. 10578


    No. 21011


    No. 21009

    KR-415FHD Short Antenna

    End of production
    No. 21010

    KR-241FH 2.4GHz FHSS

    End of production
    No. 21008

    KR-212FHG Gyro System Receiver

    End of production
    No. 21006

    KR-211FH 2.4GHz FHSS

    End of production
    No. 21005

    Aluminum Steering Wheel2(Gun Metal)

    End of production
    No. 10569

    Color Grip2( Gray)

    No. 10530

    Color Grip2 (Blue)

    End of production
    No. 10532

    ICS-USB Adapter HS

    No. 61028
  • Radios

    EX-LDT/EX-RR/2(XpansionVer2.15)Instruction Manual