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Product #: 010-0167-01

Mamba XLX2 Quick Start
Mamba XLX2 Drivers Ed Guide
XLX vs XLX2 Comparison
Audible Alert Reference
Motor Quick Start
Mamba XLX2 Mounting Template
XLX2 Resource Page     

Introducing the Mamba XLX2, an ESC that will redefine the limits of 1/5th scale R/C! 

Engineered from the ground up, the Mamba XLX2 is packed with a potent combination of hardware and software advancements, sensored performance, CRYO-DRIVE™ and waterproof design that will set a new standard for high performance power systems. The Mamba XL family is well known for its extreme performance capabilities. The XLX2 pays homage to the legacy of its predecessors and exceeds their performance on all levels.

The Mamba XLX2 and 2028-800kv combo is designed for the most extreme and demanding RC applications. The massive motor and high power ESC are capable of pushing vehicles and drivers to their limits and beyond. This is the perfect combo for vehicles weighing up to 30 lbs and up to 8s LiPo.

CRYO-DRIVE™, Castle’s proprietary breakthrough technology integrates unique software and dedicated hardware to reduce heat and dramatically increase performance.  Thousands of times per second, the XLX2 software minimizes the amount of time the electrical components spend generating heat. These software advancements work in parallel with an open housing design which enables increased directional airflow to cool critical components. With the combination of a new 50mm fan and forged elliptical fin heatsink, the XLX2 maximizes airflow throughout the system, taking thermal performance to a whole new level. The results are more power handling, cooler ESC temperatures and longer run times and for ultra-high performance.

NOTE: Due to the high power nature of the XLX2, you must use appropriately sized batteries and connectors.
We recommend a minimum 150 amp connector for the XLX2; examples include Castle 6.5mm polarized, EC8 and QS8. DO NOT USE XT90, Traxxas, EC5/IC5 or any other connectors rated below 150 amps continuous.

You can easily optimize the ESC for any driving condition, from rugged terrain to smooth pavement to the perils of rock and gravel. Create, save and download setup profiles through the Castle Link Programming Suite on your Windows™ PC, or wirelessly with the convenience of the new B-Link™ Bluetooth™ Adapter and Castle Link app for Android or iOS.

Additional tuning flexibility awaits you with on-the-fly adjustments from your transmitter via the Auxiliary wire. Simply connect the white signal wire to an open radio channel, and enable the feature in Castle Link by selecting what Auxiliary function you would like to use. Access programming parameters such as Torque Control, Max Brake or Max Throttle. 

SENSORED 1/5TH SCALE IS HERE! Pairing the Mamba XLX2 with the Castle 4-POLE 12-SLOT SENSORED 2028-800KV will allow heavy, high speed rigs to experience controllable low-end ranges without sacrificing power, punch or speed.  SmartSense™ mode uses the motor’s sensors to start the motor to provide smooth starts, excellent torque, and low-speed drivability. Once the motor is spinning, it seamlessly transitions to Castle’s ultra-efficient sensorless mode. You’ll put more power to the ground, where it should be, instead of wasting it through raw heat and RPMs.

  • Input Voltage Range 3S-8S LiPo (33.6v max)
  • Sensorless, SmartSense™  and Brushed Running Modes
  • Powerful Integrated 20A Peak Adjustable BEC (5.25V-8.0V)
  • CRYO-DRIVE™ Technology minimizes the amount of time the ESC’s electrical components spend generating heat, resulting in improved thermal performance during partial throttle operation where the majority of driving occurs
  • ESC is housed in a rugged CNC aluminum case and potted in waterproof epoxy to  protect the electronics and promote efficient heat transfer
  • Premium forged heatsink with elliptical fins for superior air flow and increased heat dissipation
  • Oversized factory equipped thermally controlled 50MM cooling fan
  • Compatible with S.BUS2 Telemetry Link and Futaba T4PX, T7PX and T7PXR transmitters
  • Mounting holes located in bottom of aluminum case for affixing to your vehicle
  • Waterproof design for all weather conditions
  • Data logging capability to capture and record performance data from your vehicle
  • Auxiliary wire functionality for "on-the-fly" adjustments using your transmitter
  • Audible alerts for easy diagnosis of common issues such as motor-over-temperature and low-voltage cutoff
  • Convenient transmitter programming for six common adjustable settings including cutoff voltage and drag brake
  • Easily tune and update ESC with USB and Bluetooth™ programming options
  • Castle Link USB programming kit (coupon included with purchase)
  • Optional smartphone-based programming with the B-LINK™ Bluetooth Adapter (sold separately and Castle Link all available on Google Play or Apple App Store)
  • Proudly designed and manufactured in Olathe, KS USA and backed by Castle Creations' 1-year warranty


  • 4-POLE 12-SLOT sensored design that boasts exceptional efficiency and produces less heat
  • Proprietary stator winding produces low internal resistance for a cooler running motor
  • Dual sensor ports to ensure optimal installation in your large-scale vehicle
  • Oversized NMB bearings and vibration dampening system ensure the longest possible bearing life
  • High-strength, high-temperature grade neodymium sintered magnets combined with high-strength Kevlar wrap ensures the integrity of the rotor is not compromised during harsh running conditions and high RPMs

  • Mamba XLX2 ESC
  • 2028-800kv Sensored Brushless Motor
  • 300mm Direct Connect Sensor Wire
  • Mamba Decals
  • Mamba XLX2 Quick Start Guide
  • Sensor port dust cover
  • Coupon for free Castle Link USB
Social Media Content
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(Based on 4 vote(s))
4 review(s) | Write a review
  • USD $499.95 /EA
    USD $374.95 /EA
    26% discount
  • List Price: USD $609.95 /EA
Code Availability Quantity
010-0167-01 This item is in stock. EA
Product Use Statements
Individual transmitter signals for neutral, full throttle, and full brake vary. You must calibrate your Castle ESC so that it will operate effectively with your transmitter. Anytime the ESC is powered up with a new transmitter or with different throttle channel settings, it will need to be calibrated to the transmitter’s throttle settings. The ESC may also need to be calibrated after updating to new software via Castle Link.
Input Voltage:
Applying voltages higher than 33.6V will cause irreparable damage to your Mamba XLX2 controller; DO NOT RUN HV CELLS (above 4.2v/cell) WHEN RUNNING AT MAX CELL COUNT (8s). This will exceed the 33.6v rating and will damage the ESC and not be covered by the warranty.
Battery Capacity Minimum:
The Mamba XLX2 is a high-performance controller; you must use high-discharge cells in your high-performance application to ensure vehicle performance. Recommended battery capacity is 5000mAh. We recommend using 50C continuous discharge or higher LiPo batteries.
Wiring and Soldering:
High strand count silicone coated copper wire is essential with higher power electric power systems. Castle Creations' wire is lower resistance than the same diameter of solid copper, meaning more power gets from the batteries to the motor with less wasted as heat. The ultra-high strand count and silicone coating means the wire is very flexible which prevents work hardening and breakage with use.
Connector Ratings Minimum:
The Mamba XLX2 requires the use of connectors designed for 150+ amps continuous. Ex. Castle 6.5mm polarized or 8mm bullet. 
The Mamba XLX2 is capable of handling incredible amounts of power, your motor must also be up for the task. Always run your motor within the manufacturer’s specs. Monitor motor, battery, and controller temps carefully and never let the motor get above 200° F. Excessive heat in the motor can damage the motor, the Mamba XLX2, and the batteries.

Always double check that all connections are tight and secure before each use. Motor and battery bullet connectors will loosen up over time from vibrations, g-forces and use. A loose connector will cause increased resistance, this can lead to arcing or stress on the electronics and lead to failure.
If you change your vehicles gearing, motor, or battery, check your motor, ESC and battery temperatures often on the first run. If components get too hot, increase the spur size, reduce the pinion size, or reduce the pack voltage.
Castle Link Settings:
During the optimization of your setup it is critical to check motor and ESC temperatures after making adjustment.  The heat limit threshold for Mamba XLX2 ESC is 200° F and Castle motors is 200° F.  We recommend the use of the data log as you progress with the feel and power of the vehicle. You will be able to record real-time data such as motor RPM, battery current and voltage, ESC and motor temperature, throttle input, and more. Download and analyze the collected data via Castle Link and make adjustments to maximize both performance and battery life.
AUX Wire:

The AUX wire allows you to adjust a setting “on-the-fly” using an auxiliary channel on your receiver. The AUX wire function is disabled by default and is programmable via Castle Link. Plug this wire into the auxiliary (#3/#4) channel on your receiver.

  • You MUST connect the AUX wire to an open channel on your receiver if running more than a single servo on the receiver. If you have 2 servos, fans, and/or LEDs plugged into the receiver, you MUST connect the AUX wire to the receiver, even if you are not using the Auxiliary function. If only the ESC and a single servo are connected to the receiver, then you do not need to connect the AUX wire to the receiver.
  • You MUST disconnect the AUX wire from your radio before connecting to Castle Link. Failure to do so may result in damage to your Castle Link and/or computer.
Operating Environment

Although Mamba XLX2 is waterproof, it is not intended for operation while completely submerged in liquid. Always rinse the ESC and motor with clean water after exposure to corrosives or dirt. While the motor and controller may be waterproof, we suggest users confirm that the rest of their vehicle, including the batteries, servos, radio and chassis are also waterproof before exposing them to liquids of any kind.

**The cooling fan must be removed prior to driving in wet conditions. It is not waterproof.

ESC Specs
Application Guidelines:
1:5th Scale vehicles weighing up to 30lbs max with included 2028-800kv motor

Vehicle Examples: Losi DB XL-E™, Arrma Kraton 8s™, Arrma Outcast 8s™, Traxxas X-Maxx™. Note: Some vehicles may require aftermarket parts to allow ESC and/or motor fitment.
Input Voltage Range:
MIN: 3S LiPo, MAX: 8S LiPo 33.6V
Running Modes:
Sensored, Sensorless, Brushed and SmartSense™ when paired with a Castle 4-POLE 12-SLOT Sensored Motor.
Brake: Proportional
Reversible: Yes, but may be disabled for racing.
On/Off Switch: Yes, waterproof
Cooling Fan: Yes, factory equipped (50mm), fully removable** (See Product Use Statements)
Size: Length: 3.98” (101.2mm),  Width: 2.49” (63.3mm),  Height: 2.2” (55.8mm)
Weight (with wires): 13.1 oz (371g)
Motor Connectors:
8mm female bullets
Items Needed for Operation: The Mamba XLX2 requires the use of connectors designed for 150+ amps continuous, such as Castle 6.5mm polarized or CC BULLET 8.0MM
Operating environment:
Waterproof design for all weather conditions (See Operating Environment Considerations)
Fully programmable Castle feature set using Castle Link USB adapter (coupon for free link included in package) and freely downloadable Castle Link Windows software, or the Castle Link App and a B-LINK Bluetooth Adapter (sold separately).
Telemetry Link Capable:
Yes, with Castle Creations Telemetry Link for S.BUS2 and Futaba T4PX, T7PX and T7PXR Transmitters.
Tech Tips:
The Mamba XLX2 has threaded mounting holes on the bottom of the ESC. There are four M3 mounting holes with a maximum depth of 5mm; they are spaced 46mm wide and 40.2mm long. Use this template for assistance in alignment and screw hole positioning.

Always double check that all connections are tight and secure before each use. Motor and battery bullet connectors will loosen up over time from vibrations, g-forces and use. A loose connector will cause increased resistance, this can lead to arcing or stress on the electronics and lead to failure.

Motor Specs
Input Voltage Range: 12S max (8s max with XLX2)
Kv: 800
Max. RPM: 45,000
Motor Size: Length: 4.4" (113.2mm)
Diameter: 2.2" (57mm)
Shaft Size: Length: 30mm
Diameter: 8mm
Weight (w/wires): 44 oz. / 1.25kg
Mounting Hole Specifications: 4mm @ 30mm spacing
Cooling Fan: Available, but not included. See 011-0153-00 here.
Connectors: 8.0mm male bullets.
Items Needed for Operation: N/A
Product Use Statements: Do not use mounting screws that extend more than 5mm into the front of the motor. Using too long of a screw can result in damage to the motor's windings and will not be covered by the warranty.

Always double check that all connections are tight and secure before each use. Motor and battery bullet connectors will loosen up over time from vibrations, g-forces and use. A loose connector will cause increased resistance, this can lead to arcing or stress on the electronics and lead to failure.
Application Guidelines: N/A
Max. Recommended Vehicle Weight: Vehicles weighing less than 30lbs.
Tech Notes: Running modes: Sensorless and Sensored

Water Resistant Design: The sensor board is coated with silicone conformal coating to protect the sensors from moisture. The sensor connections are not water resistant; water can cause signal loss which could result in loss of sensored capabilities. Castle recommended applying dielectric grease to the outside of the sensor wire connections after installation of the wire. Routine maintenance is recommended after running in wet conditions. Please refer to this document for running and maintaining motors in wet environments.

For support, frequently asked questions, technical documents, and more, visit our support site.

Castle Creations, Inc. warrants this product to be free from manufacturing defects for a period of one year from date of purchase.

This is a high power product with the potential to be very dangerous. Please read the safety information before use. This product may contain chemicals known to the State of California to cause cancer and or birth defects or other reproductive harm.

U.S. Patent # 7400103, 7492122, 7579796, 7740516, 8287328, 8678875, and 8905814 B2 - Other patents pending.

Controller designed and circuit boards manufactured, in Olathe, Kansas USA.
Controller assembled in Olathe, Kansas USA.

Motor designed in Olathe, Kansas USA.
Motor manufactured in China.
Product Features
  Castle’s newest software technology, CRYO-DRIVE™ minimizes the amount of time the ESC's electrical components spend generating heat by optimally controlling which components are being used while driving the motor. This is happening thousands of times per second, which greatly reduces the rate at which the ESC heats up.  This results in significantly improved thermal performance during partial throttle operation where the majority of driving occurs. Your setup will be able to handle higher gear ratios, in heavier vehicles, with longer runs.

When paired with a Castle 4-POLE 12-SLOT SENSORED MOTOR SmartSense™ software, enabled by default in the Castle Link Programming Suite, will use the motor’s sensors to provide smooth starts, excellent torque, and low-speed drivability.  Once the motor is turning, it seamlessly transitions to Castle’s ULTRA-EFFICIENT sensorless mode with electric timing. Smooth sensored startups and high-efficiency sensorless running makes the Mamba XLX2 system produce more power and less heat. QUIETSENSE™ is an innovative advancement in the design of sensored motors to deliver the highest precision and most efficient startup.

The Mamba XLX2 allows “on-the-fly” adjustments to be made through the AUX wire once enabled in Castle Link. Once you have selected an AUX wire function, that setting can then be tuned from your transmitter while driving. Torque control, max throttle, max brake and drag brake adjustments are a sampling of the available modes. This real-time tuning allows you to quickly and easily fine-tune your system. . Click here for additional information.

Enabled by default, the Mamba XLX2 captures and records performance data from your vehicle. This allows you to view a detailed turn-by-turn record of what your ESC actually experienced during the run. You will be able to record real-time data such as motor RPM, battery current and voltage, ESC and motor temperature, throttle input, and more. Download and analyze the collected data via Castle Link and make adjustments to maximize both performance and battery life.

For over 20 years Castle engineers have been setting the bar for industry leading software functionality. The Castle Link Programming Suite is your ticket to creating the perfect setup. To gain access to the host of tuning parameters, simply redeem the coupon for the Castle Link adapter included with your Mamba XLX2 purchase and download the simple to install software from our website and you are ready to personalize your controller's settings. You can now wirelessly program your ESC with the free Castle Link Mobile App and the purchase the B-Link Bluetooth Adapter. Click here for settings overview for the Mamba XLX2 ESC.

You can now WIRELESSLY PROGRAM settings with the free Castle-Link app available on the Apple App store or Google Play for Android devices and the Castle B-Link™ Bluetooth™ Adapter (sold separately). It is compact and lightweight installed in your vehicle, for anytime programming!

Mamba XLX2 is telemetry ready, which means owners of Futaba T4PX, 7PX  and T7PXR Transmitters will be able to purchase the Castle Creations Telemetry Link for S.BUS2. Real-time data such as ESC temperature, voltages, and RPM can be monitored to ensure performance advantages and spare you the “unknown” parameters that all R/C enthusiasts experience at some point. Telemetry data provides another level of protection and can increase performance.

Housed in a rugged CNC-machined aluminum case and then potted in waterproof epoxy. This not only protects the electronics but ensures any heat generated in the controller can easily be dissipated through the case.

Mamba XLX2 features Audible Alerts that will notify you via audible chimes of possible issues with calibrations and error conditions to help diagnose problems,

The Mamba XLX2 is proudly designed and manufactured in Olathe, Kansas USA and is backed by Castle Creations’ 1-year warranty and unparalleled "make-it-right" customer support. Call us, email us, or walk in our front door – we’re here to help. Click here for additional information about our Tier 1 and Tier II warranty.

Optional Accessories
B-Link Bluetooth Adapter supports iOS and Android App
Telemetry Link S.BUS
Castle Link Quick Connect (or Quick Connect Duo)
Quick Field Programmer, Surface Version
6.5mm Polarized Connectors-Male/Female Single Pk
6.5mm Polarized Connectors-Male Multi-Pack
Polarized Castle Connectors - 6.5mm Female Multi-Pack
6.5mm Male/Female Connector Set (3ea)
8.0mm Male/Female Connector Set (3ea)
Motor Cooling Fan, 20XX Series, V2 (Coming Soon!)
Castle Capacitor Pack, 8S MAX (35V)

Service Parts
WIRE, 36", 08 AWG, BLACK                                  
WIRE, 36", 08 AWG, RED
WIRE, 36", 08 AWG, WHITE

      Average rating:
      (Based on 4 vote(s))
      Rate this product:
      Gary From Texas
      XLX2 Combo w/ 800 or 1100kv motor
      April 7, 2024
      Two years ago when I purchased my Armma Kraton EXB roller I put a XLX2 w/ 1100kv motor in it and raced it against other 1/5 scales. That setup was beast mode since it was always hard to catch me off the starting line. Then I sold the K8 EXb, purchased a Losi DBXLE 2.0 roller, put the XLX2 1100kv setup in it, and ran it for a year. It had no problems getting that chassis to move and it helped me win several 1/5 scale races. After a year I put in an 800kv motor and tuned it. Now that setup is more fun than ever running at 66mph off-road.
      0 of 0 people found this review helpful
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      Hammer From United States
      Power House!! ??
      July 14, 2023
      I’ve had this combo in my Kraton 8s since it was released and it’s an absolute powerhouse!! I’ve tried many combos and this one is by far my favorite! ??
      If you don’t believe me.. get one and try it yourself. ??
      0 of 0 people found this review helpful
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      Jesse williams From Gardnerville nv
      Xlx2 800kv combo
      July 14, 2023
      Perfect power for the arrma kraton 8s exb. And with the castle link you can tune it to your style of driving
      0 of 0 people found this review helpful
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      Ricky Willingham From United States California
      Absolutely KING
      April 20, 2022
      I purchased this ESC and Motor combo the XLX2 with 800Kv motor and short answer is this is absolutely insane and king in my 1/5 EXB Kraton 8s. If you’re interested in more specifics continue reading.
      I am running 37/47 and after fixing the diffs in the Kraton (1 mil front silicone ear plugs mid and 500K in rear) this truck loves the huge power system that it has available. It will easily pull 12 o’clock wheelies while bash racing on grass and dirt, it has the instant power to correct while in air and while doing all of this the motor without a fan does not even get to 170 deg for the entirety of the session. Battery wise I use the Gens Ace Bashing Pro 11K (x2) I have some images of my set up on my instagram page @themaxxrc if you’re interested in seeing what the set up looks like. If you have read this far I appreciate you taking the time and valuing my opinion on this product. I can’t wait to get more ESC and Motor combos offered from Castle.
      5 of 5 people found this review helpful
      Was this review helpful to you? (5) (0)

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