Overview
The Losi Promoto-MX isn't the first scale RC motorcycle that's ever been sold. But it is the very first one that accurately reproduces the full experience and pure fun of riding a real motorcycle. It's the long-awaited dream of RC hobbyists and dirt bike fans alike. Whether you're a seasoned competitor looking for a new challenge, a weekend basher seeking something different, or discovering the world of RC for the first time, this ready to run RC motorcycle delivers unprecedented realism through a unique hybrid of mechanical and electronic technology developed specifically for the Promoto-MX. This brushless RC motorcycle represents a genuine breakthrough in the hobby.
The unprecedented realism of the Promoto-MX goes much deeper than its faithfully detailed looks, featuring the narrow frame, officially licensed FXR Racing graphics, and authentic rider gear. What truly sets this 1/4 scale RC motorcycle apart is how successfully it captures authentic dirt bike performance through innovative engineering. The best-looking and best-performing RC dirt bike ever made, the Promoto-MX combines cutting-edge electronics with carefully engineered mechanical systems that replicate the handling characteristics of full-size motorcycles. It's fully assembled and ready-to-run—requiring only a compatible LiPo battery and charger to get started, making it an ideal brushless RC motorcycle for anyone seeking immediate riding enjoyment.
For dirt bike enthusiasts, the feel of the Promoto-MX will be instantly familiar. RC car fans will discover an entirely new way to drive that pulls you deep into the heart of the action—carving berms, skimming whoops, holding wheelies, and throwing roost. Unlike other RC motorcycle models, the Promoto-MX performs better at high and low speeds than any previous RC motorcycle thanks to its integrated electronic and mechanical systems working in perfect harmony.
Key Features
- Patent-Pending Spektrum MS6X Technology — This innovative stabilising technology improves balance and control by allowing the Promoto-MX to lean, turn, and manage wheelies with unprecedented finesse. The system takes your input from the included DX3PM transmitter and commands the motorcycle to respond with realistic dynamics that mimic real dirt bike behaviour.
- Frame-Integrated High-RPM Flywheel Unit — A heavy steel flywheel spinning at over 22,000 rpm with the 2700Kv motor creates powerful gyroscopic force for unparalleled stability. Mounted as low and as far forward as possible in the frame, this flywheel enables the Promoto-MX to pivot around its centre point to improve jumping, changes of direction, and overall riding accuracy.
- Spektrum Firma 3652 3800Kv Brushless Motor — This powerful brushless system delivers 40+ mph speeds with smooth, efficient power delivery. The 4-pole motor configuration ensures responsive acceleration and consistent performance across all terrain types.
- Three Drive Modes for Complete Control — Dirt Mode allows the motorcycle to pitch up sufficiently for jumps and obstacles whilst preventing over-rotation. Street Mode clips throttle output when pitching begins, keeping the front tyre on the ground for maximum acceleration. Wheelie Control lets you hold sustained wheelies at any speed on smooth surfaces. Switch between modes on the fly using the transmitter's A/B rocker switch.
- Officially Licensed FXR Racing Graphics and Dunlop MX53 Tyres — Authentic styling with factory racing branding combines with Dunlop's proven motocross tyre design. The MX53 tyres provide genuine grip characteristics matched to real dirt bike performance, enhancing both realism and handling.
- Rising Rate Rear Suspension — Engineered using full-size motorcycle suspension geometry, the rear suspension provides superior grip and prevents bottoming out during high-impact landings. This sophisticated suspension system is a key factor in the Promoto-MX's superior terrain handling.
- Innovative Front Fork Design with Tuning Capability — An internal spring and dampener system allows you to adjust ride height and tune performance by changing silicone dampening fluid. This level of adjustability is rarely found in RC motorcycles and puts genuine tuning capability in your hands.
- Dual Disc Braking System with Cable Drive — Featuring both front and rear braking, this innovative system cuts stopping distance in half compared to rear-brake-only designs. The functional, cable-driven front disc brake provides realistic stopping power and control.
- Chain Drive with Dual Disc Performance Slipper Clutch — The slipper clutch prevents engine stalling during hard braking and provides smooth power delivery during acceleration changes, just like a real motorcycle.
- Lean Bars with Adjustable Stops — These protective bars catch the front tyre if it washes out on loose dirt, preventing the Promoto-MX from exceeding its maximum lean angle and helping push it back upright for recovery. Adjustable stops allow dialling in the bike for any surface or grip level.
- Twin Aluminium Plate Chassis — The twin-plate construction adds realism, rigidity, and durability. This distinctive feature captures authentic motorcycle styling whilst providing the structural strength needed for high-performance riding.
- Front Crash Structure Protection — Fork tubes are protected with a collapsible front crash structure that prevents bending during front impacts, safeguarding critical steering components.
- Servo Saver with Bearing-Mounted Composite Plates — Stiff circular springs provide consistency in steering with enough give to protect the servo. This innovative design dramatically improves bike performance when setting down from wheelies, landing from jumps, power sliding through turns, and pushing the front tyre over ruts.
- Head Damping with Fluid-Filled Friction Chamber — A sophisticated system filled with 500,000cSt damping fluid controls the strong servo saver springs and prevents head shake during aggressive cornering and high-speed driving.
- Rear Fender Pivot Design — The rear fender pivots away with a nylon bumper, greatly increasing durability and helping with crash recovery whilst maintaining authentic styling.
- Realistic Rider Figure with Authentic Gear — Complete with boots, helmet, and authentic riding apparel, the detailed rider figure adds immersive realism and captures the spirit of dirt bike competition.
- Hands-Free Starting Stand — Included for convenient and safe starting without needing a second person or complex setup procedures.
- Keyed Bike Stand — Allows secure storage and display when not riding, protecting the motorcycle from damage.
- Smart Battery Compatible — Works with Spektrum Smart LiPo batteries to display remaining capacity on the transmitter's LED indicators. Upgrade to a DX5C or DX5 Pro transmitter to receive real-time telemetry including speed, RPM, amp draw, and ESC temperature.
Technical Performance
The Losi Promoto-MX delivers exceptional performance through careful engineering of both electronic and mechanical systems. Powered by a Spektrum Firma 3652 3800Kv 4-pole brushless motor paired with an 85A brushless smart motorcycle ESC, this ready to run RC motorcycle accelerates to 40+ mph with smooth, responsive power delivery. The motor spins the integrated steel flywheel at over 22,000 rpm, creating gyroscopic stabilisation that gives the bike stability comparable to real motorcycles. The 2S 7.4V 5000mAh LiPo battery (sold separately) fits neatly within the rider's seat thanks to clever engineering, allowing quick battery swaps without compromising the narrow, realistic chassis design. The motorcycle measures 513mm in length, 274mm in width, and 439mm in height, achieving a compact 1/4 scale that's manageable yet substantial enough for serious riding. Weighing 3.5kg, the Promoto-MX strikes an excellent balance between durability and manoeuvrability. All electronics are integrated seamlessly, including the Spektrum 6-channel DSMR receiver, Spektrum S620PM metal gear steering servo, and Spektrum SX108PM micro servo for front brake control. The twin aluminium plate chassis provides excellent rigidity whilst the rising rate rear suspension and tunable front fork deliver genuine suspension performance. The cable-driven front and rear disc braking system, combined with the dual disc slipper clutch, provides realistic control and stopping power that's essential for precise riding.
What's in the Box
- Losi Promoto-MX RTR Motorcycle (fully assembled and ready-to-run)
- Spektrum Smart DX3PM Transmitter with three drive modes
- Four AA batteries for transmitter
- Keyed bike stand for storage and display
- Hands-free starting stand for convenient bike launches
- 1/4 Promoto-MX Motorcycle Instruction Manual
- Quick Start Guide
- Chain lubricant for maintenance
- Fork and shock tuning tools for suspension adjustments
What You Need to Complete
- 2S 7.4V 5000mAh LiPo battery with EC5 or IC5 connector (sold separately)
- Compatible LiPo charger (sold separately)
Frequently Asked Questions
- Is the Losi Promoto-MX suitable for RC beginners? — Yes, the Promoto-MX is excellent for those new to RC motorcycles. It arrives fully assembled and ready-to-run, requiring only a battery and charger to start riding. The three drive modes (Dirt, Street, and Wheelie Control) allow beginners to start in Street Mode for easier control, then progress to more aggressive driving as skills develop. The patent-pending Spektrum MS6X technology actively helps maintain balance, making it forgiving for newer riders learning motorcycle-specific driving techniques.
- What battery does the Promoto-MX need and how long does it run? — The motorcycle requires a single 2S 7.4V 5000mAh LiPo battery with either an EC5 or IC5 connector (sold separately). The battery fits neatly within the rider's seat for quick swaps. Runtime varies depending on driving style and terrain, but the 5000mAh capacity provides extended session times. Spektrum Smart batteries are recommended as they display remaining capacity on the DX3PM transmitter's LED indicators.
- How fast does the Losi Promoto-MX go? — The brushless motor and electronic speed control system enable speeds of 40+ mph, providing genuine performance thrills whilst remaining manageable for various skill levels. The three drive modes help control top speed appropriately for different terrain and riding styles.
- What makes the Promoto-MX different from other RC motorcycles? — The Promoto-MX is the first RC motorcycle that accurately reproduces the full experience of riding a real dirt bike. It combines innovative Spektrum MS6X stabilising technology with mechanical engineering based on full-size motorcycle suspension geometry. The frame-integrated high-RPM flywheel creates gyroscopic stability, whilst rising rate rear suspension, tunable front fork, and dual disc braking all contribute to authentic handling. Most importantly, the three independent drive modes provide genuine control over the motorcycle's behaviour, something no previous RC motorcycle has achieved.
- Can I upgrade to a better transmitter? — Yes, the Promoto-MX is compatible with Spektrum DX5C or DX5 Pro transmitters. These upgrades provide real-time telemetry information including speed, RPM, amp draw, and ESC temperature, giving you detailed performance data whilst riding.
- How do I maintain and tune the suspension? — The tuning tools and fork and shock tools are included in the box. The front fork's internal spring and dampener can be tuned by changing the silicone dampening fluid, and ride height can be adjusted. The adjustable lean bar stops allow dialling in performance for different surfaces and grip levels. Regular chain lubrication is important, and the included chain lube should be used to maintain optimal drivetrain performance.
- Is the Promoto-MX waterproof? — Whilst the electronics are relatively protected within the chassis, this is not a waterproof-rated vehicle. It's designed primarily for dry conditions on dirt, asphalt, and gravel. Avoid water submersion and heavy rain to protect the motor, ESC, servos, and receiver.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the LOS 1/4 Promoto-MX Motorcycle RTR FXR Red today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
Parts Diagrams
Front Assembly
Chassis Assembly
Transmission Assembly
Rider and Panel Assembly
Lean Bar Assembly
Front Wheel Assembly
Rear Wheel and Chain Assembly
Starting Stand and Bike Stand
