Techtonic Hobbies

Losi Promoto-MX 1/4 Scale RC Motorcycle RTR Combo - Pro Circuit Scheme

Experience the thrill of motocross racing with the Losi Promoto-MX 1/4 scale RC motorcycle. This ready-to-run combo features stunning Pro Circuit graphics and delivers authentic two-wheeled performance that will leave you breathless. With its revolutionary self-balancing gyro technology and powerful brushless motor, the Promoto-MX brings the excitement of professional motocross to your backyard or local track.

Key Features:

• Ready-to-Run Combo - Complete package includes battery and charger for instant action
• 1/4 Scale Authenticity - Massive size with incredible detail and presence
• Self-Balancing Gyro - Advanced stabilization technology keeps the bike upright and stable
• Brushless Power - High-performance motor delivers impressive speed and acceleration
• Pro Circuit Graphics - Eye-catching professional racing livery
• Spektrum DX3 Radio - Precision 3-channel control with DSMR technology
• Durable Construction - Built to handle jumps, crashes, and aggressive riding
• Realistic Suspension - Front and rear suspension for authentic motocross handling

What's Included:

• 1x Losi Promoto-MX 1/4 Scale RC Motorcycle (RTR)
• 1x Spektrum DX3 3-Channel DSMR Transmitter
• 1x Spektrum 3200mAh 3S 11.1V Smart LiPo Battery
• 1x Spektrum S120 USB-C Smart Charger
• 1x Product Manual

Specifications:

• Scale: 1/4
• Model: Promoto-MX
• Motor: Brushless
• Radio: Spektrum DX3 DSMR 2.4GHz
• Battery: 3200mAh 3S 11.1V Smart LiPo (included)
• Charger: Spektrum S120 USB-C (included)
• Graphics: Pro Circuit Scheme
• Weight: 20kg
• SKU: LOS06002
• Barcode: 605482170502

Revolutionary Self-Balancing Technology:

The Promoto-MX features an advanced gyro stabilization system that keeps the motorcycle balanced and upright, making it easier to control than traditional RC motorcycles. Whether you're carving corners, hitting jumps, or performing wheelies, the self-balancing technology provides confidence-inspiring stability.

Perfect For:

RC enthusiasts, motocross fans, and collectors seeking the ultimate large-scale RC motorcycle experience. The Promoto-MX delivers authentic two-wheeled thrills with the convenience of ready-to-run simplicity. From backyard bashing to track racing, this 1/4 scale beast is ready to dominate.

Pro Circuit Graphics:

Featuring the iconic Pro Circuit racing livery, this Promoto-MX looks as good as it performs. The professional graphics package captures the essence of championship motocross racing and turns heads wherever you ride.

Unleash the power of professional motocross with the Losi Promoto-MX 1/4 scale RC motorcycle.

MEET THE MONSTER KING!
The legend has evolved, and it’s bigger, tougher, and meaner than ever! The HPI Racing Monster King is here to take the crown, born from the DNA of two fan-favorite platforms: the Wheely King and the Crawler King. By combining the best of the Wheely-King and Crawler King into a single monster truck platform, we’ve created something special for Wheely-King fans!

Built around a refined version of the original Wheely King chassis, the Monster King boasts a new center gearbox with external slipper clutch, enhanced steering geometry, and new hex hardware for easier maintenance. Every change made  with the performance, and fun in mind — from the Lock-Nut suspension mounts that banish E-clips forever, to the rugged new Tredz tires wrapped around wide 2.2” MT wheels.

Topping it all off is the fully licensed Ford Bronco 4400 bodyshell, an RC replica inspired by the real-life Big Kahuna truck, run by Shane England, with the help of RTR Vehicles and Vaughn Gittin Jr. Motorsports. Featuring a detailed interior, internal roll cage, and working LED light bars, this stunning body brings authentic Big Kahuna style and realism to the Monster King.

The Monster King Big Kahuna brings the spirit of the original Wheely King into a new era. Stronger, smoother, and packed with upgrades that fans will appreciate. With its tough solid-axle design, authentic details, and that unmistakable HPI fun factor, it’s ready to tear up any terrain in true monster truck style.

Tredz TRZ 135x86mm tires
No monster truck is complete without a serious set of shoes, and the Monster King Big Kahuna delivers in style. Brand-new 2.2” 56mm wide monster truck wheels give the truck a bold, aggressive stance, perfectly matched to the new Tredz TRZ 135x86mm tires. Designed specifically for the Monster King, these high-grip TRZ tires feature a deep, open tread pattern that provides outstanding traction on dirt, grass, gravel, and asphalt alike. Whether you’re pulling wheelies, climbing rocks, or carving up the backyard, these tyres are built to perform.

Moulded in HPI’s high-quality rubber compound, the new Tredz TRZ tyres strike the perfect balance between soft, grippy feel and long-lasting durability. Combined with the wide wheels for improved stability, they deliver confident handling and predictable control across any terrain — all while giving the Monster King its unmistakable, beefed-up monster truck look.

Fully Licensed Bodyshell & Authentic Graphics
The Big Kahuna name has serious pedigree — and your new HPI Racing Monster King Big Kahuna model brings that legacy straight into your hands. Driven and owned by Shane England out of Powderly, Texas, Big Kahuna made its debut in 2013 and has become a fan-favourite for its daring stunts, bold graphics and surf-culture flair. 

We’ve captured that spirit in a meticulously licensed bodyshell: the Ford Bronco 4400–inspired design that Big Kahuna unveiled for its modern era. Every curve, graphic and detail reflects the real truck’s aesthetic, from the surf-board silhouette to the rugged roll-cage and standout “BIG KAHUNA” brand.

Crafted from high-strength polycarbonate, the bodyshell is screen printed and hand-finished with cutout windows sitting atop a hard-plastic internal roll cage for scale authenticity and durability. You’ll also see working LED lights in the grille and roof-bar, controlled via the transmitter for show-quality lighting on scene.

It’s a full-fidelity tribute to the real Big Kahuna truck, now shrunk to RC scale with all the attitude intact.

The Monster King is easy to drive with the included All-New 4 Channel 2.4Ghz FHSS TF-51 Transmitter. Features:

NEW - 4th Channel - 100 position digital slider,
NEW - Steering Exponential, 
Drop-down steering position for a natural control position,
Foam-covered wheel for extra comfort and grip,
Swappable steering wheel design for left-handers!
Rubber finger and thumb handle grips,
Rubber bumpers on all corners for the highest protection,
Magnetic area for body clips or screws while you work!
Digital on and off switch,
Audible warnings for low power and idle time!
Servo Reverse, EPA, Trims and Dual Rate switches.

The NEW RF-51 receiver features a waterproof silicone inner jacket for use in any weather and a built-in failsafe - Uses the HPI 4-way LED Adaptor to add headlights with the built-in LED Light controller!

• Features
  1/10th Scale Monster Truck
  Fully licenced RTR-Vehicles Ford Bronco 4400 Polycarbonate bodyshell
  with hard plastic cage and driver.
  Updates to the Wheely King/Crawler King chassis
  New centre gearbox configuration
  New external adjustable slipper clutch
  New spur gear cover
  New motor mount plate
  Motor mounting positioning Inserts
  New rear body mount bracing
  New radio box
  New “E-Clip” eliminating lower shock and linkage mounts
  New steering linkage
  New Hex hardware
  New 2.2” 56mm wide MT wheels and Tredz 135x86mm “TRZ” tires.
  Oil-Filled shocks
  Front and rear differentials
  Aluminum blue-anodized lower links
  Higher Carbon content, less flexible upper links
  TF-51 Transmitter and RF-51 Receiver
  SC-3SWP2 Brushed ESC (2S Max recommended for Brushed Motor)
  Brushed 550 12T motor
  LED headlights and roof bar lights included (TX controlled)
  2000mAh Ni-MH pack and USB Charger included
  Metal Geared Steering Servo (6.0V/16kg/MG)