[Limited] EX-NEXT LDT Black SP w/ KR-420XT Triple Receiver

No. 10772

<Includes Serial compatible receiver KR-420XT>
<Limited Triple receiver set>

# Dimensions:256.0×170.0×127.5mm(Does not include protrusions)
# Weight: 563g(battery not included )
# Power supply: AAA size dry battery x4,
        Ni-MH battery x4,
        Li-Fe battery (2cell 6.6V)*,
        Li-Po battery (2cell 7.4V)*,
        (Batteries are sold separately.)
# Current: 200mA or less
# Channel: PWM 4ch / Serial 8ID
   *Maximum setting ID number of serial are different by each products.
# Frequency: 2.4GHz
# Radio Mode: XT
# Model memory 50
# Compatible receiver: KR-420XT, MINI-Z EVO 2 receiver unit for KO compatible transmitter, MINI-Z EVO Receiver Unit EX-NEXT MC-8

*Do not charge the battery with the power on.

*This product’s manual is not included in the package, please download from here.
*Please refer to the Expert Grip Unit LDT manual here.
*Can not use LCD Xpansion unit EXP-104 series.
*Can not use FHSS or DSSS receiver. (KR-418FH KR-415FHD,KR-210S etc)
*The product photos on this site are prototypes, which may be different to production models.

Made in Japan

  • Black painted version available in the lineup

    A new black color has been added to the EX-NEXT lineup. Instead of simple solid black paint, it is painted in black with pearl. The matt texture gives it a luxurious feel.


    The aluminum steering wheel has been changed to a new design.


    New idea! Equipped with Lay Down Trigger!​

    A new idea to lay down the operation axis of the trigger by 90 degrees. This sensation that you can squeeze and press naturally with your fingertips. Ergonomic design that does not disturb the movement of the fingers realizes a seamless and highly linear operation feeling over the entire stroke. Makes accelerator work and braking smoother and more enjoyable. "LDT" is born, which seems to improve Dora Tech for both one and two ranks. This appearance, which is also focused on the quality of operation feeling, takes you to a new dimension. Also, this is adjustable for using by children who has small hands  * There are limit by Hand size.

    For more information on "LDT", please visit here.

    Charge battery by connecting to stand

    Balance terminal extension cable is included. You can charge the battery without removing the battery from the transmitter.
    *This compatible connecttor is XH (3 pins).* Compatible Battery size (Maximum):88x18x32cm






    Equipped with a new standard "XT" that achieves the fastest communication speed in the industry​.

    You can choose and use from "XT advanced mode" which is the world record response for one way communication and "XT telemetry mode" which is compatible for Telemetry ( 2 ways communication).



    XT Advanced Mode

    An all new control software and radio communication software of the EX-NEXT has been developed.  World record communication response and High resolution control are installed. 
    "XT Advanced mode" that is the highest speed in EX-NEXT is about 3 times the speed of the EX-RR. 
    The performance far exceeds the conventional high-speed communication.

    High-speed communication in the XT advanced mode improves the information density that will be sent to the receivers. 
    You will feel a "Fine and smooth maneuvering feeling" by unprecedented high-definition and high-resolution control when operating.

    XT Telemetry mode

    EX-NEXT supports "XT Telemetry mode" that uses 2-way communication. When "4S series servos" that support serial compatible are connected to the B/S port in the new receiver KR-420XT, you can use "REAL TIME ICS". So, you can easily change parameters of servos from the transmitter without accessing the car directly. Setting your car with more freedom and more detail without compromise.

    Also, even using the XT Telemetry mode that is 2-way communication, the High-speed response is still faster thanthe EX-RR.


    High speed supported by Serial servo.​

    Currently mainstream servo control method is performed by PWM control. PWM control method uses pulse width to send position of servos output from receiver. Serial control method uses a digital signal value to send the position of the servo output. So, communication speed of the Serial control method will be significantly faster than a PWM control method, time ofthe servo’s action from your operation input is shorter. Operating feeling will be ultra high speed like operating thecar directly.

    <Compatible servos> RSx4S / BSx4S Series


    *Servo is sold separately.


    Supported HCS.

    EX-NEXT & KR-420XT support the use of HCS that was adopted from the RSx3, BSx3 series. Until now, it was necessary to change the receiver mode using the settingdevice, but with EX-NEXT this can be changed from the transmitter for each channel. HCS compatible servos are automatically change to HCS mode when the received signal is HCS. If you want use HCS, please connect servos to 1-4ch ofthe KR-420XT.

     <Compatible Servo> RSx3 / BSx3 / RSx4S / BSx4S Series


    NORMAL mode

    You can use different kinds of servos by changing the response mode to "Normal mode". So, you can use most current servos and ESC with EX-NEXT.

    In this case, please connect to 1-4ch of the receiver.
    *If you change the response mode of EX-NEXT from NORMAL to XT advanced mode in the radio settings, the maximum movement degrees of servos are limit to maximum about 42 degrees and will change. So, if you use NORMAL mode were commended setting to XT telemetry mode in the radio setting. In case of using an ESC, there is no chance of using over a travel limit, so there is no problem using with XT advanced mode.


    Firmware Ver.3.00 compatible with MINI-Z

    Firmware Ver.3.00 is released to use MINI-Z EVO with EX-NEXT. By combining it with MR-04EVO2 and "MINI-Z EVO 2 Receiver Unit for KO Compatible Transmitter (No.82045)", you can use the "telemetry function" that allows you to adjust settings from the radio, and the "advanced mode" that allows faster communication.

    If you already have EX-NEXT

    If you already have EX-NEXT, you can update it to Ver. 3.00 to make it compatible with MINI-Z EVO. Please download the software and files necessary for uploading from the following links.  *The ICS USB Adapter HS is required for the update.

    "EX-NEXT Updater, Update file"

    *"MINI-Z EVO 2 Receiver Unit for KO Compatible Transmitter (No.82045)" is not included in this set.
    *When using "MINI-Z Mode" and "MINI-Z EVO Receiver Unit EX-NEXT MC-8" and "MR-03", telemetry function  and advanced mode cannot be used even if EX-NEXT is updated to Ver. 3.00.
    *The conventional "MINI-Z EVO Receiver Unit 82040" is not compatible with this product.


    Ultra small receiver KR-420XT

    Port on the KR-420XT

    The figure below shows the ports of the KR-420XT. There are a total 5 ports. The most right port is the B/S port. In case of using serial mode compatible servos, connect to this port.
    1-4 ch are same function as conventional KR-418FH and KR-415FHD. You can use conventional servos in these ports.


    Equipped with a terminal compatible for serial communication​.

    KR-420XT supports “REAL TIME ICS" that is a new serial communication to servos . You can use "REAL TIME ICS" by connecting to the B/S port using the BSx4-one10 Grasper2 that supports serial communication.

    There is only one B / S port, but you can connect two or more devices by changing the device ID number and using a twin extension cable. You can use "REAL TIME ICS" in a GP car or other categories too.

    Example for wiring serial servo.

    If you use 2 servos with GP car, connect the 2 servos to the B/S port using the Servo Twin Extension Wire II w/new plug. It is necessary to change ID number to 2 for the throttle servo, but it is easy to change by connecting it to the Xpansion of EX-NEXT. 

    Ultra small dimensions case​

    The ultra-compact receiver KR-420XT, which is equipped with the latest devices abundantly for the EX-NEXT. While maintaining the same footprint as the KR-418FH compact receiver, which has been very well received, the connector mounting height has been reduced, and the total volume is smaller then before. 5 Connecting ports for servos or ESC are equipped. Also, unused connecting ports can be use to power cooling fans and transponder for lap counting systems.

    Pairing device without Power cycle.

    The UI (user interface) of the setup switch and pilot LED has also been reviewed. In addition to the same handling as the conventional KO PROPO receiver, pairing and RF mode switching functions have been additionally implemented without turning the power on / off.KR-420XT has the capability to install an antenna pipe to receiver case directly just like the KR-415FHD, which has been very well received. The footprint is the same as the conventional model KR-418FH, but you can save the trouble of installing an antenna mount.


    Intuitive alert function with vibration and full-color LED

    Equipped with a vibration motor that has been requested. This can be used for alarms that notify the running time and alerts for various sensors. In addition, the LED on the front of the master unit is a full-color LED. The radio wave mode in use and the alert content of the vibration motor can now be identified by the LED lighting pattern.


    Xpansion 2 that can change the ICS setting of the servo is standard equipment.​

    EX-NEXT is equipped with the evolved "LCD Xpansion unit 2 EXP-201" as standard equipment. New telemetry, XT radio mode, supported menu, and also the newly added setting function for ICS compatible servo are standard. Serial compatible servos which support "REAL TIME ICS" and conventional ICS compatible servos can be used. Change settings of an ICS servo by only using the Xpansion unit 2 without using a PC or servo model selector.

    *It necessary to use external power (6 to 7.4V) for setting by Xpansion unit 2 only. Please use the "Servo Twin Extension Wire II w/new plug" for power supply, sold separately.



    New Drop down extension Unit 2.1

    Tune up for EX-NEXT

    Tuned for the evolution of the EX-NEXT to match the fastest feeling master unit as an exclusive use unit.

    Superior durability and operation feeling led by new angle sensor.

    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!

    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.


    Firmware update function.​

    Firmware update function is supported with the use of the ICS USB Adapter HS.
    Please refer below pages for information about update.
    EX-NEXT Updater, Update file

    *Window PC and ICS USB adapter HS are necessary for update.
    *Firmware for EX-NEXT can only be used for this product.  It cannot be used with EX-RR/LDT/2/6/6R.


    EX-NEXT function list

    RF mode/Response/REAL TIME ICS/Battery fail safe

    Model select /Model name/ Model copy /Model reset /50 model

    Display / Battery / Calculator / Sound/ VR information / Setting /Key speed /Menu speed  /Display language / Operation timer /User timer / All reset

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

    <Throttle>Travel F / Travel B / Trim /Sub trim / Trim rate / Speed turn(3way) / Speed return(3way) / Curve / Punch / Feel / Response / Push control / Acceleration / ABS /Auto Start / Idle up / Neutral brake / Over ride / Reverse / Brake in / Hand brake

    Key setting/ 2WAY / 3WAY / 5WAY / Analog/ Gyro / Twin servo / 4WS/AMP mixing
     /Throttle mixing / Trim set 

    Key setting/ 2WAY / 3WAY / 5WAY / Analog

    Timer Start / Trigger start / Lap history / Start stop key/Lap key /Lap navi / Alarm time/ Pre alarm / Aram mode / Timer mode (Lap timer/ Down timer)



    Master Unit EX-NEXT (Black SP) x1
    LCD Xpansion Unit2 EXP-201 ×1
    Aluminum Steering Wheel6 x1
    Drop down  extension Unit 2.1 ×1
    Expert grip unit LDT x1

    Receiver: KR-420XT ×3

    Other: Throttle Lever(wide)/Trigger Pad/Brake spacer/Balance terminal extension cable

    *Battery, Dry batteries are sold separately