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. This is the long-awaited dream of RC hobbyists and dirt bike fans alike. Whether you're an experienced RC car enthusiast looking to explore a new dimension of remote control driving, or a dirt bike fan wanting to experience motocross-style action in miniature form, the Promoto-MX represents a revolutionary breakthrough in RC motorcycle design and performance. The unprecedented realism goes much deeper than its faithfully detailed looks with narrow frame, authentic rider gear, and officially licensed Pro Circuit graphics – it successfully captures true dirt bike performance through a unique hybrid of mechanical and electronic technology developed specifically for the Promoto-MX.
This ready to run RC motorcycle is fully assembled and comes with everything you need to start riding immediately, including a 5000mAh 2S LiPo battery and Smart S120 USB-C charger. The combination of innovative engineering and premium components makes the Promoto-MX the best-looking and best-performing RC dirt bike ever created. With speeds of over 40 mph, realistic chain drive, functional braking system, and authentic Dunlop MX53 tyres, this is not just another RC toy – it's a serious piece of engineering that delivers genuine motorcycle-like handling and performance that will appeal to both RC enthusiasts and motocross fans in the UK.
The Promoto-MX stands apart from other brushless RC motorcycles because it combines frame-integrated electronic technology with sophisticated mechanical systems that have been carefully engineered based on full-size motorcycle suspension geometry. This means the bike handles like a real dirt bike, carving berms and skimming whoops with genuine motorcycle feel and responsiveness. For RC car enthusiasts seeking a new way to drive that pulls you deep into the heart of the action, and for dirt bike fans wanting authentic motocross-style control, the Losi Promoto-MX delivers an entirely new category of RC riding experience.
Key Features
- Patent-Pending Spektrum MS6X Technology — This revolutionary new stabilising technology works in conjunction with the DX3PM transmitter and SR6300PM receiver to give unprecedented control over the motorcycle's lean, turn, and wheelie actions, allowing you to maintain perfect balance at high or low speeds and over jumps and whoops with unmatched finesse.
- Frame-Integrated High-RPM Flywheel Unit — The heavy steel flywheel spins at over 22,000 rpm with the 2700Kv motor to create powerful gyroscopic stabilisation force that greatly improves balance and control, mounted as low and as far forward as possible in the frame to enable the Promoto-MX to pivot around its centre point for superior jumping, direction changes, and performance accuracy.
- Three On-The-Fly Drive Modes — Toggle between Dirt Mode for natural pitch control during jumps, Street Mode for aggressive acceleration with throttle clipping to keep the front tyre planted, and Wheelie Control to hold full wheelies on smooth surfaces all the way to top speed using the DX3PM transmitter's A/B rocker switch.
- Realistic Chain Drive System — The Promoto-MX features a steel chain with 70 roller pins wrapping around a 10-tooth steel drive sprocket and 36-tooth aluminium hub sprocket, delivering authentic motorcycle-style power delivery that works reliably regardless of conditions, making this a true dirt bike experience not found on other RC motorcycles.
- Dual Front and Rear Braking System — An innovative braking system with cable-driven front disc brake and rear motor braking cuts stopping distance in half compared to rear brake only, giving this 1/4 scale RC motorcycle impressive stopping power for serious riding and racing applications.
- Rising Rate Rear Suspension — Based on full-size motorcycle suspension geometry studied by Losi's development team, the rising rate rear suspension provides superior grip and prevents bottoming out during landings, delivering authentic dirt bike handling characteristics.
- Collapsible Front Crash Structure — Protective fork tubes feature a collapsible design that prevents bending during front impacts, keeping your Promoto-MX protected during inevitable crashes and allowing rapid crash recovery.
- Fully Tunable Front Fork Design — The completely new front fork incorporates an internal spring and dampener that can be tuned by changing silicone dampening fluid, plus allows ride height adjustments to dial in the bike's setup for different surfaces and grip levels.
- Adjustable Lean Bars with Stops — These protective lean bars catch the front tyre if it washes out on loose dirt, keeping the Promoto-MX from exceeding its maximum lean angle and helping push it back upright to straighten out and exit the turn, with adjustable stops for up and down travel to customise performance.
- Servo Saver with Circular Springs — The servo saver features stiff circular springs captured by bearing-mounted composite plates, providing consistency in steering with enough give to protect the servo whilst drastically improving performance when setting down from wheelies, landing from jumps, power sliding through turns, and pushing the front tyre over ruts.
- Fluid-Filled Head Damping System — A key development for the Promoto-MX is a fluid-filled friction chamber between the upper and lower head tube bearings, filled with heavy 500,000cSt fluid that dampens the servo saver and controls any possible head shake during aggressive riding.
- Realistic Rider Figure with Authentic Gear — Unlike foam-based rider figures used by other RC motorcycle manufacturers, the Promoto-MX includes a durably engineered rider with rubberised plastic exterior that can give and flex under impacts and flips, complete with boots, brain bucket, and riding gear, featuring a foam insert in the torso to keep the rider firm during normal operation whilst still able to give under impact.
- True-Spoke Wheels — The Promoto-MX features realistic true-spoke wheels that are a first for RC motorcycles, with proper-looking spokes and the durability needed for serious dirt bike riding, something no other RC manufacturers have successfully achieved.
- Officially Licensed Pro Circuit Graphics and Dunlop MX53 Tyres — This ready to run motorcycle comes with officially licensed Pro Circuit graphics and authentic Dunlop Geomax MX53 tyres, delivering authentic motocross styling that looks like a real competition dirt bike.
- Powerful Brushless System with 40+ mph Speed — The Spektrum Firma 3652 3800Kv 4-pole brushless motor delivers powerful acceleration and top speeds exceeding 40 mph, making this the fastest and most responsive RC motorcycle available today.
- Hands-Free and Keyed Bike Stands — Both a convenient hands-free starting stand and a keyed bike stand are included, allowing you to set up and display your Promoto-MX safely and securely.
- Smart Battery Technology — The included Spektrum 5000mAh 2S Smart G2 50C LiPo battery with IC5 connector shares critical performance data with the DX3PM transmitter, with LED indicators on the transmitter showing remaining battery capacity at a glance, and the option to upgrade to Spektrum DX5C or DX5 Pro for real-time telemetry including speed, RPM, amp draw, and ESC temperature.
- Fully Assembled Ready-to-Run with Everything Included — Unlike many RC motorcycles requiring additional purchases, the Promoto-MX comes completely assembled with battery, charger, transmitter, and all accessories, allowing you to unbox and start riding within one hour.
Technical Performance
The Losi Promoto-MX represents a significant engineering achievement in brushless RC motorcycles, combining a 540-size Spektrum Firma 3652 3800Kv 4-pole brushless motor with an 85-amp Spektrum Firma brushless smart electronic speed control to deliver consistent, powerful performance across a wide speed range. The motor drives a 20T pinion gear with an internal 4.8:1 gear ratio and 50T spur gear for a final drive ratio of 12.0:1, resulting in top speeds exceeding 40 mph whilst maintaining precise control at low speeds. The 5000mAh 2S 7.4V Spektrum Smart G2 50C LiPo battery provides ample power for extended riding sessions and is fully integrated with the AVC stability control and MS6X technology in the Spektrum SR6300PM receiver. This 1/4 scale motorcycle measures 513 mm in length, 439 mm in height, and 274 mm in width, with a wheelbase of 353 mm and a substantial weight of 3500 grammes distributed for optimal balance and stability. The 16mm big bore aluminium shocks front and rear provide excellent damping with tunable spring rates, whilst the rising rate rear suspension geometry ensures superior grip during cornering and prevents bottoming out under hard landings. The chain drive system uses steel components throughout for reliability, whilst the Dunlop MX53 tyres with 65S compound provide excellent traction on dirt surfaces. The chassis is constructed from 3mm aluminium plate for a perfect balance of lightweight strength and durability, whilst the twin aluminium plate chassis adds realism and rigidity that surpasses previous designs. Full ball bearings throughout ensure smooth, responsive handling, and the cable-driven front disc brake combined with rear motor braking delivers impressive stopping power for a ready to run RC motorcycle. The included Spektrum Smart DX3PM transmitter features DSMR 2.4 GHz technology with six channels of precise control, whilst the Spektrum S620PM metal gear steering servo provides accurate steering inputs.
What's in the Box
- Losi Promoto-MX Pro Circuit RTR Motorcycle – fully assembled and ready to ride
- Spektrum Smart DX3PM Transmitter with DSMR technology and three pre-programmed drive modes
- Four AA transmitter batteries to power the DX3PM controller
- Spektrum 5000mAh 2S 7.4V Smart G2 50C LiPo Battery with IC5 Connector
- Spektrum Smart S120 USB-C Charger (1x20W output) with IC3/IC5 adapter
- Bike stand with keyed lock system for safe storage and display
- Hands-free starting stand for convenient setup
- 1/4 Promoto-MX Motorcycle RTR Product Manual with detailed setup and maintenance instructions
- Quick Start Guide for immediate riding
- Chain lube for maintenance of the realistic chain drive system
- Tuning parts for customising suspension and handling characteristics
- Fork and shock tools for adjusting suspension damping and ride height
Frequently Asked Questions
- Is the Losi Promoto-MX suitable for beginners in RC motorcycles? — Yes, the Promoto-MX is suitable for riders with Skill Level 3 experience. Whilst it is not a beginner-level vehicle due to its advanced technology and realistic handling characteristics, it is fully assembled ready to run, meaning you don't need RC building or mechanical skills to get started. The three on-the-fly drive modes, particularly the Dirt Mode which helps prevent wheelie-overs, are specifically designed to help newer riders learn the bike's behaviour. If you're new to RC motorcycles but experienced with RC cars, you'll find the intuitive control inputs and stable MS6X technology make learning easier than previous RC motorcycle designs.
- What is the difference between the Promoto-MX and other RC motorcycles available in the UK? — The Promoto-MX is fundamentally different from other RC motorcycles because it's the first to successfully combine realistic mechanical motorcycle suspension geometry with patent-pending electronic stabilisation technology, creating authentic dirt bike feel and performance. Previous RC motorcycles either looked realistic but didn't perform like real bikes, or performed acceptably but lacked authentic handling. The Promoto-MX combines frame-integrated flywheel technology, dual front and rear braking, rising rate rear suspension, true-spoke wheels, realistic chain drive, and MS6X lean control to deliver something entirely new – a brushless RC motorcycle that actually handles like a real dirt bike.
- What battery does the Promoto-MX require and how long does it last? — The Promoto-MX uses a 2S LiPo battery configuration with the included Spektrum 5000mAh 2S 7.4V Smart G2 50C battery featuring an IC5 connector. This battery is specifically sized to fit within the compact, narrow chassis required for the bike's realistic proportions. Runtime depends on riding style, terrain, and drive mode selection, but the 5000mAh capacity provides extended play sessions. The Spektrum Smart technology means the battery communicates with the DX3PM transmitter, displaying remaining capacity via LED indicators so you always know when a charge is needed.
- Is the Promoto-MX waterproof for wet conditions? — The Promoto-MX is designed for off-road dirt riding and features exposed electronics typical of RC motorcycles. Whilst it can handle damp conditions and light rain during normal usage, it is not fully waterproof and should not be submerged or exposed to heavy water spray. After wet riding, allow the bike to dry thoroughly before charging the battery or using again.
- What speeds can the Promoto-MX achieve? — With the Spektrum Firma 3652 3800Kv brushless motor and Spektrum Firma 85A ESC, the Promoto-MX delivers powerful brushless acceleration with top speeds exceeding 40 mph, making it one of the fastest ready to run RC motorcycles available. The three drive modes allow you to optimise performance for different riding conditions and skill levels.
- Can I use a different battery with the Promoto-MX? — The Promoto-MX requires a 2S LiPo battery with an IC5 connector. Other 2S batteries with IC5 connectors can be used as upgrades or spares, such as the Spektrum 7.4V 5000mAh 2S 100C Smart G2 Hardcase battery, giving you flexibility for extended riding sessions with multiple battery packs.
- How do the three drive modes work? — The DX3PM transmitter includes three pre-programmed modes toggled on the fly using the A/B rocker switch: Dirt Mode allows natural pitch control for jumping whilst clipping throttle to prevent wheelie-overs; Street Mode clips throttle quickly when the front tyre starts to pitch up, keeping it planted for maximum acceleration; Wheelie Control allows you to hold full wheelies on smooth surfaces all the way to top speed.
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 with Batt & Chg Pro Circuit C-LOS06002 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
