No. 30126


​#Torque: 7.5Kg-cm Speed: 0.13sec/60deg(@6.0V)

#Dimensions: 33×26×15mm (Mini size)
#Weight: 26.0g
#Operating voltage: 6.0V 
#The hard alumite aluminum gear (first gear made by plastic)
#Core-less motor
#Dual ball bearings
#The hard servo gear shaft
#Black cable
#Gold plated connector

#Recommended category
 1/12 Racing, GTcar, F1.

Made in Japan.

  • This succeeds to the technology of RSx. This is the mini-size servo which fits 1/12 category most.
    It uses a high-power core-less motor in luxury and secures high retentively and reliability.

    The servo adopts the aluminum gear to which hardening Alumite treatment is applied.
    The gear is strong in a shock and moreover shows an effect in the reproducibility of the driving.
    The black wire servo leads, attractive in a chassis layout, are used.

    HCS Compatible.

    HCS (High speed Communcation System) is the new high speed communication system between the receiver to the servo. The HCS mode shortens communication time of the signal which is compressed. HCS compatible servos is changing mode automatically by signal from receiver. So HCS compatible servos can use with all receivers.  
    If you want to use servos by HCS, please use with HCS compatible receivers.


    Installed preset settings

    The following factory MODEL settings are pre-installed. 
    You can chenge setting by Servo model selector.

    Model1: Default setting(1/12 Stock class recommend)
    Model2: 2014 IFMAR setting (1/12 Modified class recommend,mild)
    Model3: 2015JMRCA Champion(1/12 Modified class recommend, Quick)
    Model4:  GT500, World GT, F-1 Rubber tyre class recommend
    Model5:  F1 form tyre, Asphalt road surface recommend

    *Model1 has been selected in factory setting.


    ICS Compatibe. 

    You can change servo's setting when you use our software" ICS Servo Manager".
    Ex, parameter of stretch. More retentivity in High grip condition, less retentivity in Low grip situation,
    You can select value by grip situation for best setting servos.


    Servo x1
    Grommet x4
    Screw for Horm

  • RSx3-12 World spec version

    End of production
    No. 30127

    RSx3-12 GT version

    End of production
    No. 30128

    Servo Model Selector

    End of production
    No. 61029

    ICS-USB Adapter HS

    No. 61028
  • Servos

    RSx3 / BSx3 Series Manual

    KO Driver

    KO Driver 2015

    Servo Manager

    ICS ServoManager Software Ver2.0.1.0
    This software can setting for RSx/BRx2/RSxone10/BSx2one10/RSx-12. Also you can use setting data from our.


    RSx12 series Factory setting


    Servo Fitting Chart
    Fitting chart for various KO Servo.


    About ICS(new version 10.2017)

  • Compatible for HCS! KR-415FHD