KO Propo

An Easy-to-Use Brushed ESC from KO PROPO for Beginners and Veterans Alike
A simple, ready-to-use design that allows you to install it right out of the box. It comes with preset programs that are compatible with any car. Additionally, motor connections are made easy with connectors, ensuring a hassle-free setup. Just follow the manual for initial setup, and you'll be ready to drive in no time.

Equipped with a Low Voltage Cutoff Function!
Lithium Polymer and Lithium Ferrite batteries can be damaged by over-discharge, but the VFS-FR3 is equipped with a low voltage cutoff function, allowing you to play without worrying about over-discharge. In the past, a PC was required to change the settings, but now with the VFS-FR3, you can select the battery mode during the initial ESC setup. You can also check which battery mode is selected by the LED status.

Available modes: Lipo/LiFe/NiMH, NiCD

Back Timer Setting Function Added
You can now set the time delay before entering reverse after pulling the trigger on the transmitter. This feature helps prevent accidental reversing during fine brake control, similar to pumping the brakes. During the initial ESC setup, you can choose from three levels. Additionally, more detailed settings can be adjusted using the manager software.

Compatible with KOPROPO's proprietary HCS
Now compatible with KOPROPO's proprietary "HCS" system, reducing the communication processing time between the receiver and ESC by 1/4 for a more direct control feel.

The mode automatically switches when connected to an HCS-compatible receiver. Of course, it can still be used in normal mode, so no changes are needed from previous compatible models.

Powerful BEC Circuit for Safe Use with Two Servos!
Equipped with a 6V 3A BEC circuit (receiver/servo power circuit), the VFS-FR3 uses high-capacity components, unlike the 1.5A parallel elements often found in overseas products. This ensures that even when using two high-current servos for 4WS systems, the circuit will not be damaged. Additionally, the built-in limiter function activates in the event of issues like steering lock, so you can use it with peace of mind.

Suitable for Experienced Drivers!
While you may start with the standard motor from the kit, as you gain experience, you'll want to push for more speed. The VFS-FR3 has no motor turn limit, so when you're ready to unleash even more performance, you can adjust the drive frequency to maximize the potential of high-spec motors. It delivers the same powerful output as the VFS-FR2.

Feature
# Foward / Reverse / Brake function.
# KO Variable frequency system setting.
Foword 32 divide step positions, 64 frequency settings
# Factory setting installed.
Recommend setting (please use motor as below)
[LIPO] over 12T recommended
[Life,NiMH] over 23T recommended
# Reverse cancel setting.
# Equipped with voltage cutoff (Selectable modes: Lipo/LiFe/NiMH, NiCD)
# Back timer can be set before entering reverse mode
# Neutral brake function
# Using "VFS-FR3 Manager" allows for more detailed settings.

Specifications
#Dimensions: 32.6× 29.0× 19.4mm
#Weight: 25.3g (Main Unit Only)
#Compatible motor: Brushed motor unlimited
#Maximum peak current: 1200A (FET Spec)
#Maximum continuous current: 300A (FET Spec)
#Rated Current: 120A (FET Spec)
#Drive Frequency: 0.50(±0.3) - 7.00(±0.3)kHz (64 steps)
#Operating voltage: 6.6 to 8.4V (BEC output voltage: 6.0V)
#BEC output 6.0V/3A

Made in Japan.

Attention
*You can not use setting card for the VFS.
*If you want to change the cut off voltage and each parameter, you must use the PC and ICS USB Adapter HS.

Replacement gear set for the BSx4S Grasper STD.

High quality black KO servo wire.  250mm.

An adapter that can be used for branching serial signals. It is recommended when connecting two serial servos such as GP cars to the B / S port (serial port) of the receiver. It can also be used as a branch for power supply such as lap count transponders.

By making the branch part a small base, it is more compact than the conventional product. It is a size that is easy to store in the limited mounting space of GP cars.

Replacement case top for the BSx4S servo.

By changing bottom case of "BSx4s-one10 Grasper2" or "RSx4S-one10X" can be reversing the lead wire out direction, wiring such as touring cars can be neatly organized. Due to the heat sink effect, the heat of the FET can be efficiently dissipated.

Weight :4.7g ( +2.3g from default case)
Dimension(thickness) :5.8mm (+1.3mm from default case)

[Compatible models]
BSx4S-one10 Grasper2
BSx4S-one10 Grasper2 DRIFT SPEC
RSx4S-one10X
RSx4S-one10X Type-T

Replacement aluminium upper case for BSx2-one10 Grasper / BSx3-one10 Grasper.

The "Grasper" series, which has been well received since its launch, has achieved its characteristic "high holding power that seems to bite" in the standard size as well. The basic specifications have been greatly improved by adopting a new brushless motor. It has a high speed of 0.09sec/60°, which is in the response class, and generates a powerful torque of 40.0kgf.cm(@7.4V), the highest of KOPROPO. In addition to this, the Grasper STD with its strong holding power delivers cornering performance worthy of the name "Grasper".

The included selector allows you to switch between preset models.

5 patterns of presets available

Five presets are installed in the model memory of the Grasper STD. You can use them properly according to the machine and road surface. Please use the servo model selector to switch the servo function that can handle various situations with one servo.

Model 1: Power saving high
Model 2: Power saving low (Factory setting)
Model 3: Balance
Model 4: Performance
Model 5: High performance
* Since the holding power of the 4th and 5th settings is very strong, a creaking noise will be heard when in neutral, but this is not a malfunction.

What is holding power
The holding force is the force that the servo shaft tries to hold a position. Grasper has meanings such as "grasping tightly" and "grasping firmly", and is a name that expresses the characteristics of this servo that firmly captures the road surface.

Reinforced stainless steel final gear
The durability of the servo has been strengthened to match the improved servo specifications. Stainless steel is used for the final gear. Furthermore, nitriding treatment has been applied to achieve the strength to withstand the maximum torque of 40.0kgf.cm(@7.4V). In addition, the height of the serrations on the final gear has been adjusted slightly higher to allow the use of multiple servo horns. The number of teeth and diameter of the serrations are unchanged.

[Specifications]

#Torque: 40.0Kg-cm Speed: 0.09sec/60deg(@7.4V)
#Torque: 33.0Kg-cm Speed: 0.12sec/60deg(@6.0V)

Reference Spec
#Torque: 44.0Kg-cm Speed: 0.08sec/60deg(@8.4V)

#Dimensions: 40.4×37.5×20mm (Standard size)
#Weight: 76.5g
#Operating voltage: 6.0～7.4V (Lipo, Life, Ni-MH)
#Brush-less motor
#Reinforced stainless steel final gear
#Hard alumite aluminum gear
#Dual ball bearings
#Hard servo gear shaft
#Aluminum top case
#Aluminum heat sink middle case
#Black cable
#Gold plated connector
#Serial Compatible
#HCS Compatible

#Recommend category
1/8 Off road, 1/8 On road, 1/8GT, 1/10 EP Off road

Made in Japan.

RSx standard size series evolves to serial communication
The "RSx" standard series, which has been loved by many users for many years and has been active in races around the world, has evolved to be serial compatible while maintaining its basic performance. By combining this with the EX-NEXT advanced mode, the RSx series can provide even better response performance than before. In addition, by using the telemetry function of EX-NEXT, it is now possible to change the ICS parameters of the servo from the radio. Since the EX-NEXT supports conventional HCS and standard communication specifications, it can be used not only with the serial-compatible KR-420XT but also with a wide variety of receivers.

The Servo model selector for 4S is included so you can easily switch between preset models.

Compared to the "Grasper STD" with brushless motor, the "RSx4S" with coreless motor has a milder operation feeling. Use the RSx4S according to your preference of machine, course, and driving feel.

Reinforced stainless steel final gear
The RSx4S(Standard size) uses stainless steel for the final gears to strengthen the durability of the gears. In addition, the height of the serrations on the final gear has been adjusted slightly higher to allow the use of multiple servo horns. The number of teeth and diameter of the serrations are unchanged.

Implemented a "4S" system that supports serial
The "4S" servo supports serial. By supporting serial, there are the following merits.

(1) Ultra-high-speed communication dramatically improves response.
The PWM method is the mainstream control method for RC servos. In the PWM method, the angle is specified by the width of the signal transmitted from the receiver. On the other hand, in serial communication, the servo angle can be specified numerically. In serial communication, the communication interval can be significantly shortened compared to the PWM method, and the interval from command to operation is greatly reduced. By combining with EX-NEXT's XT mode, we have achieved an unprecedented ultra-fast response as if you were just touching the machine.

(2) Servo parameters can be changed from the radio at hand
The next-generation radio "EX-NEXT" is equipped with a telemetry (two-way communication) function. "REAL TIME ICS" can be used by connecting the serial compatible servo "4S" to the B / S port mounted from the new receiver KR-420XT. Servo parameters can be set arbitrarily from the radio without having to collect the machine at hand. It's easier than ever to create a more flexible and in-depth settings without compromise.

When using serial, connect to the B / S port of the KR-420XT in XT mode of EX-NEXT.

"Serial Branch adapter" ideal for serial wiring
The KR-420XT receiver is equipped with a single B/S port (serial port) for connecting serial servos, and for GP cars, etc., where two servos are used, the optional "Serial Branch adapter" is recommended for splitting the port.

This product is more compact than the conventional product by using a smaller base for the branching point, making it easier to store in the limited space of a GP car.

If you want to use two serial servos at the same time, you need to change the ID number of each servo. the ID number can be easily changed by connecting to [LCD Expansion Unit 2] of EX-NEXT. for how to change the ID number, refer to "LCD Expansion Unit For details on how to change the ID number, please refer to "LCD Expansion Unit 2 EXP-201 Startup Guide".

Electrical Switch3

The Serial servos and the Electrical Switch 3 can be used together.
When the B/S port of the KR-420XT(receiver) is occupied by the serial servos, connect the Electrical switch 3 to one of the available 1CH~4CH.

Added "Frequency" as a new parameter
RSx4S can change various characteristics to your liking by ICS, but "Frequency (FREQUENCY)" has been newly added from 4S. "Frequency" is a function to change the frequency of the motor built into the servo. By changing the frequency, the servo Activity changes. Direct feeling improves by lowering the frequency. The servo operation becomes active and the machine will bend sharply. The higher the frequency, the smoother the servo will move. The activity will be calm and you will be able to bend smoothly. Please select your favorite characteristics while changing the settings.

Compatible with conventional systems (PWM)
It can also be used in HCS, which has been well received, and in normal mode, which can be used for a wide range of models.

【HCS】

The communication processing time between the receiver and the servo is compressed to 1/4, and it can be used with a direct operation feeling.

[Normal mode]
System used for servos and ESC’s that has been adopted for many years. It can be used with many receivers.

Serial / HCS / normal mode switching method.
The servo automatically switches depending on the port connected to the receiver and the mode setting. No additional options are required for mode setting. If you want to use it serially, connect it to the B / S port of KR-420XT. Also, when using with HCS, it can be used simply by connecting to channels 1 to 4 set in HCS. The same applies to normal mode. Of course, it can also be used with the KR-418FH and other receivers that have been released so far. * Only KR-420XT can be used for serial mode. For conventional receivers, use HCS or normal mode.
　
Tight black and silver new color aluminum top case
An aluminum case is used for the top case that supports the [holding power] that does not shake. By further cutting after alumite treatment, a sharp form with an edge is created (chamfering). Furthermore, by cutting the inner thickness to the utmost limit, the product is lightweight while maintaining sufficient strength.

Reduced case size for easy installation in chassis
By reducing the size of the servo case in the longitudinal direction from 41.0mm to 40.4mm, it is now easier to mount servos in a variety of the GP car.

Easy-to-manage black servo wire
Commitment extends to servo leads. The black cable, which looks tight, has the optimum softness for handling while ensuring the required current capacity. The length of the cable has been changed from 200mm to 250mm.
This has made it possible to install the product in many car models without difficulty.

5 patterns of presets available
Five presets are installed in the model memory of the RSx4S. You can use them properly according to the machine and road surface. Please use the servo model selector to switch the servo function that can handle various situations with one servo.

Model 1: Settings that can be used for all purposes regardless of category(default)
Model 2: ^
Model 3: ^^
Model 4: ^^^
Model 5: ^^^^ *Increased holding force and torque
*The factory default setting is "Model 1".

Please use "Servo Model Selector for 4S" to switch models.
* The conventional servo model selector (No.61029) cannot be used.

・Factory Default setting data

Model Setting Sheet

The RSx4S allows you to change the parameters of each model with EX-NEXT.

LCD Xpansion unit 2 Parameters can be changed from EXP-201

You can connect a servo to the Xpansion and set the characteristics to your liking by operating the Xpansion buttons. Compatible servos are all models equipped with ICS. Of course, it also supports RSx4S.

* A separate power supply (6 to 7.4V) and "twin extension wire" or "Serial Branch adapter" are required.

* This product does not support parameter changes by the servo manager connected to a PC.

Please be careful

There may be slight vibration under no load, but this is not a malfunction. This servo sets the parameters to optimize the driving condition. Therefore, when viewed with the servo alone, the output shaft may generate slight vibrations or drive noise, but this is not an abnormality and does not interfere with operation.

Contents
Servo x1
Grommet x4
Eyelet for servo case x4
Screw for Horn x1
Servo model selector for 4S x1

Specifications
#Torque: 17.6Kg-cm Speed: 0.06sec/60deg(@7.4V)
#Torque: 14.5Kg-cm Speed: 0.07sec/60deg(@6.0V)

Reference Spec
#Torque: 19.4Kg-cm Speed: 0.06sec/60deg(@8.4V)

#Dimensions: 40.4×37.5×20mm (Standard size)
#Weight: 75.3g
#Operating voltage: 6.0～7.4V (Lipo, Life, Ni-MH)
#Core-less motor
#Reinforced stainless steel final gear
#Hard alumite aluminum gear
#Dual ball bearings
#Hard servo gear shaft
#Aluminum top case
#Aluminum heat sink middle case
#Black cable
#Gold plated connector
#Serial Compatible
#HCS Compatible

#Recommend category
1/8 Off road, 1/8 On road. 1/10 OFF road

The "Grasper" series, which has been well received since its launch, has achieved its characteristic "high holding power that seems to bite" in the standard size as well. The basic specifications have been greatly improved by adopting a new brushless motor. It has a high speed of 0.09sec/60°, which is in the response class, and generates a powerful torque of 40.0kgf.cm(@7.4V), the highest of KOPROPO. In addition to this, the Grasper STD with its strong holding power delivers cornering performance worthy of the name "Grasper".

What is holding power
The holding force is the force that the servo shaft tries to hold a position. Grasper has meanings such as "grasping tightly" and "grasping firmly", and is a name that expresses the characteristics of this servo that firmly captures the road surface.

Reinforced stainless steel final gear
The durability of the servo has been strengthened to match the improved servo specifications. Stainless steel is used for the final gear. Furthermore, nitriding treatment has been applied to achieve the strength to withstand the maximum torque of 40.0kgf.cm(@7.4V). In addition, the height of the serrations on the final gear has been adjusted slightly higher to allow the use of multiple servo horns. The number of teeth and diameter of the serrations are unchanged.

[Specifications]

#Torque: 40.0Kg-cm Speed: 0.09sec/60deg(@7.4V)
#Torque: 33.0Kg-cm Speed: 0.12sec/60deg(@6.0V)

Reference Spec
#Torque: 44.0Kg-cm Speed: 0.08sec/60deg(@8.4V)

#Dimensions: 40.4×37.5×20mm (Standard size)
#Weight: 76.5g
#Operating voltage: 6.0～7.4V (Lipo, Life, Ni-MH)
#Brush-less motor
#Reinforced stainless steel final gear
#Hard alumite aluminum gear
#Dual ball bearings
#Hard servo gear shaft
#Aluminum top case
#Aluminum heat sink middle case
#Black cable
#Gold plated connector
#Serial Compatible
#HCS Compatible

#Recommend category
1/8 Off road, 1/8 On road, 1/8GT, 1/10 EP Off road

Made in Japan.

[Specfications]
●Dimentions:30.9×18.4×13.5mm
●Weight:5.8ｇ
●Operation Voltage: 4.8～7.4V
●Frequency: 2.4GHz（XT）
●Number of Channel: PWM 4CH、Serial 8ID
●Black shild antenna
●Gold-plated terminals
●Telemetry compatible
●Serial control compatible
●HCS compatible
●Fail safe function equipped

[Compatible models]
EX-NEXT
*It cannot be used with EX-LDT/EX-RR/EX-2.
*The KR-242XT is exclusively for XT telemetry. Please use the KR-420XT if you wish to use XT Advanced Mode.
*The "France Mode" RF mode (WIDTH), which was implemented in EX-NEXT (firmware version 2.02 and earlier), is not supported. Please pair using "General Mode."

Made in Japan

Battery box with 8pcs of UM-3 or AA battery for transmitter.

KO PROPO Trigger assembly for LDT. 

Throttle Unit Assy for KIY.

Also fits EX1 trigger. (Replaces KO16064)