A fresh style and updates to key features combine with the proven mechanical and electronic technologies of the Promoto to make the Losi Promoto-SM an RC motorcycle that stands out on the road, bringing the look and performance of a supermoto to the asphalt.
Product details
A fresh style and updates on key features combine with the proven mechanical and electronic technologies of the Promoto to make the Losi Promoto-SM is an RC motorcycle that stands out on the road, bringing the look and performance of a supermoto to the asphalt.Main features
- Fully assembled and ready to go - just needs a battery and charger.
- Updated position of the tilt bar and wheels with bearings
- New front brake caliper and piston
- Street SM tires in smaller wheels supermoto style
- Front fender and hand guards Supermoto
In the box
- (1) Losi Promoto-SM 1/4 Supermoto Moto RTR FXR
- (1) Spektrum Smart DX3PM Transmitter
- (4) AA Batteries Transmitter
- (1) Motorcycle stand
- (1) Starter support
- Product Manual
- Quick Start Guide
- (1) Chain lubricant
- Tuning parts
- Tools for the fork and shock absorber
Necessary to complete
- LiPo 2S battery with IC5 connector and compatible charger

Losi 1/4 Promoto-SM FXR Supermoto RC Motorcycle RTR Overview
Leaving the starting line, accelerating on the straights, and leaning into the curves and turns, a unique harmony develops between a motorcycle and its rider. The two intuitively become one. Despite its power, the motorcycle feels light and agile, reacting instantly to your commands, as if it were simply an extension of yourself.
That's also how it feels to ride motorcycles. Losi Promoto RC.
The Losi Promoto-MX was the first RC cross bike to accurately replicate the complete experience and pure fun of riding a real motorcycle. Now, for RC enthusiasts and road bike lovers, Losi Introducing the Promoto-SM, the most authentic supermoto experience ever offered in a remote-controlled motorcycle.
The Promoto-SM is particularly suitable for concrete, asphalt, blacktop, and other hard surfaces found in neighborhood streets, local parks, and parking lots. Key differences from the Promoto-MX include the new Pro-Line Racing OE (Original Equipment) street tires on smaller wheels, a more powerful front brake caliper, and revised lean bar wheels. The Promoto-SM can lean more than its dirt bike counterpart, and the lean bar tires reduce noise and provide better traction on hard surfaces.
The Losi The Promoto-SM also has the look of a true supermoto. Its distinctive visual details include hand guards, a shortened front fender, and official licensed FXR rider graphics and gear.
What the Promoto-SM shares with the groundbreaking Promoto-MX is an innovative blend of mechanical and electronic technology that work together to deliver a realistic experience that no other RC bike can match. The electronics include a 2700Kv motor and a steel flywheel, both mounted at the center of the frame. The motor spins the flywheel at over 22,000 RPM to create gyroscopic force that provides unmatched stability. The patent-pending Spektrum MS6X technology takes its data from the Spektrum DX3PM transmitter and commands the Promoto-SM to lean, turn, and perform wheelies with unprecedented balance and finesse.
Mechanical technology is equally impressive. The product development team at Losi Studied the geometry of full-size motorcycle suspension to equip Promoto RC bikes with the same handling characteristics on terrain. An upward-travel rear suspension provides superior grip and prevents bottoming out on landings. Its completely new front fork, featuring internal spring and damper, can be adjusted by changing the silicone damping fluid and also allows for ride height adjustments. An innovative braking system for both front and rear wheels adds impressive stopping power, reducing braking distance by half compared to using the rear brake alone.
Both technologies, electronics and mechanics, are the reason why the Promoto platform performs better at both high and low speeds than any previous RC motorcycle. Now, with the Losi Promoto-SM, there?s an RC motorcycle that truly works, with performance and style ready for the asphalt!
Video of the Losi Promoto-SM FXR Supermoto
In-depth video of the Losi Promoto-SM FXR Supermoto
Losi 1/4 Promoto-SM FXR Supermoto RC Moto RTR Features
- Officially licensed FXR graphics
- Spektrum MS6X technology pending patent
- High-revolution flywheel integrated into the chassis
- Variable speed rear suspension
- Powerful brushless system with speeds of over 40 mph.
- Dirt, Street, and Wheelie Control riding modes
- Foldable front shock structure
- Realistic pilot figure with authentic piloting gear
- Functional front disc brake cable-operated
- High-performance double disc slipper clutch chain transmission
- Hands-free kickstand included
- Motorcycle stand with key included

UPDATED TILT BARS
The tilt bar positioning of the Promoto-SM has been updated to allow for a greater angle than its counterpart for motocross bikes. The new rubber tires on the tilt bar, mounted on bearings, reduce noise and provide better traction on hard surfaces. Adjustable stops for both the upward and downward travel are included, so you can customize the bike for any surface or grip level. Tilt bars also often assist in recovery in case of a fall when the rear tire has traction. If the bike goes down on the track, simply throttle up to get it upright and back in action.

SPEKTRUM MS6X TECHNOLOGY PATENT PENDING
The Spektrum DX3PM transmitter and the included SR6300PM receiver combine with the patented MS6X technology to provide unprecedented control. Promoto-SM drivers can maintain balance at high or low speeds while maneuvering over concrete, asphalt, blacktop, and other hard surfaces. For more aggressive driving and extreme turning angles, use the MS6X remote to increase the tilt angle.

"DRIVING MODES" "ON THE GO"
The DX3PM features three pre-programmed driving modes that you can switch between "on the fly" using your thumb on the A/B toggle switch.
- Dirt Mode - Allows the Promoto-SM to lift sufficiently without cutting the throttle to jump over obstacles, while intuitively cutting the throttle output if the bike begins to rise too much, helping to prevent "wheelie-overs."
- Street Mode - Detects when the Promoto-SM starts to bob and quickly cuts the throttle, allowing the front tire to return to the ground for maximum acceleration.
- Wheelie Control - Let them run! Wheelie Control allows you to maintain wheelies on smooth surfaces up to maximum speed.

SMART TECHNOLOGY
How much battery does your bike have left? You don't have to guess. The LED indicators on the DX3PM transmitter show you at a glance the remaining capacity of your Spektrum Smart batteries. Thanks to Spektrum Smart technology, the Promoto-SM stores and shares critical performance data while you ride. Smart technology also simplifies battery charging. When you connect a Smart battery to a Spektrum Smart charger, the battery's unique charging requirements are automatically transferred from its memory microchip through the IC connector data cable to the Smart charger. Safe charging starts automatically! (You can receive additional real-time telemetry information, such as speed, RPM, amperage consumption, ESC temperature, and much more, by upgrading to the Spektrum DX5C or DX5 Pro transmitter.)

UPDATED BRAKE PADS AND PISTON
Although the original front brake system of the Promoto-MX worked well, the design team believed improvements could be made. A completely new caliper and floating piston were designed to apply a larger pressure area to the brake pad. Additionally, a new metal injection molded (MIM) piston shaft has been installed in the bearings for smoother operation and better sealing against dust and debris. All of this contributes to shorter stopping distances and more consistent braking performance.

STEERING UNIT
The gyroscopic stabilization force created by its heavy steel flywheel?spinning at over 22,000 RPM with the 2700Kv motor?does wonders for the motorcycle's stability. Mounted as low and forward as possible on the frame, the flywheel unit allows the Promoto-SM to pivot around its central point, enhancing jumps, direction changes, and the precision of the bike's performance.

HEAD CUSHIONING
With eight pounds rapidly propelling down the track, a fairly stiff servo spring setup is needed to properly guide the Promoto-SM through the next turn. Like anything that is heavily damped, the best way to control strong springs is to dampen the movement. A key development for the Promoto platform is a fluid-filled friction chamber between the upper and lower bearings of the steering tube. The chamber is filled with 500.000cSt heavy weights that effectively dampen the servo elevator and help control any potential "head shake"

SERVO SAVER
The rigid circular springs of the servo protector, captured by composite material plates mounted on bearings, provide consistency in steering with enough give to protect the servo. But that's not all. It also drastically improves the bike's performance when coming down from wheelies, landing jumps, powering through a corner, and pushing the front tire over a curb. It gives way to keep the bike upright.

ELECTRONICS INCLUDED
- Transmitter (Spektrum DX3PM Smart DSMR)
- Receiver (Spektrum Promoto DSMR 6-channel Receiver)
- Steering Servo (Spektrum S620PM Metal Gear Servo)
- Front brake servo (Spektrum SX108PM Micro Servo)
- Motor (Spektrum Firma 3652 3800Kv 4-Pole Brushless Motor)
- Flywheel Assembly (Spektrum Motorcycle Stator and ESC Assembly / Spektrum Motorcycle Flywheel Assembly)
- Electronic Speed Control (Spektrum Firma 85A Brushless Smart Motorcycle ESC)

NARROW CHASSIS
To achieve the right scale appearance, the electronics and battery of the bike needed to fit into a compact and narrow chassis. Requiring a special "shorty" battery would have simplified the design task, but the Promoto-SM product development team wanted to use a more convenient, standard-sized battery. Mission accomplished! A full-size hardcase 2S LiPo fits in the rider's seat, easily accessible for quick battery changes. Place a charged pack, and you'll be back in seconds to lead the competition.

REALISTIC FIGURE OF THE PILOT
The figures of other RC bike riders are made entirely of foam, which deteriorates quickly. Promoto riders feature a plastic exterior coated with rubber that can yield and flex upon impact and tumbles. To prevent the rider from swaying on the bike, the torso has a foam insert. It keeps the body stable during normal operation but is still able to give way in case of impact. With its upgraded gear, the Promoto-SM rider looks ready for the aggressive action of road racing!

PRO-LINE RACING OE TIRES (ORIGINAL EQUIPMENT) SUPERMOTO STREET
The Promoto-SM is equipped with the new Pro-Line Racing OE (Original Equipment) Supermoto street tires. In addition to enhancing the scale appearance of the bike, the Supermoto tires are specifically designed for the unique wear and traction requirements of supermoto-style street racing.

SCREEN/STARTUP MAINTENANCE AND SUPPORTS
Working on a real motorcycle is easier with the right stand. That's why the Promoto-SM also had to come with one. The included stand for maintenance and display follows the design of a real motorcycle stand, complete with graphics. To keep the bike balanced on the stand, the Promoto-SM fits right into it. But going a step further, a hands-free starting stand is also included. This starting stand cradles the rear tire and keeps the motorcycle upright and ready for a door-style start.

TRUE SPOKE WHEELS
Before that Losi the Promoto platform; no other manufacturer had been able to create spoke wheels with the right appearance and the durability needed for an RC motorcycle. It took the determination and expertise of the product development team from Losi To achieve this, the Promoto-SM features true-to-life spoke wheels that are smaller, in line with the design of actual road motorcycles.

GRAPHIC PLASTICS
Big or small, no street bike would look good without the right set of body panels wrapped in vinyl graphics. The Promoto-SM has everything you need: fenders, license plate holder, fork protectors, front and rear side panels, all with a fresh look wrapped in updated and highly durable vinyl graphics.

REALISTIC DETAILS
Even the small details matter, and Losi nothing has been overlooked - escape, brake line, footpegs, brake rotors, whatever it may be. The Promoto-SM also includes hand guards, which mimic those used on full-size supermoto bikes to protect the brake and clutch levers during a fall.

REAR MUDGUARD
Wheelies happen. A standard rigid-mounted rear fender would really take a beating. But the Promoto-SM has the solution: an articulated rear fender with elastomer springs that can flex during wheelies to reveal a durable nylon rear bumper. This significantly enhances the durability of the rear fender.

FRONT IMPACT STRUCTURE
The front shock structure of the Promoto-SM is rigid during normal riding, but it compresses until the front tire hits the chassis frame to absorb frontal impacts. This protects the front fork tubes from bending, keeping them safe and secure.

CARTER COVERS AND VENTILATION GRILLES
The molded composite skid plates cover the front and bottom of the Promoto-SM chassis. They provide protection during impacts and keep debris out of the chassis, helping to safeguard the electronic components mounted inside. The ventilation grilles on each side of the bike come closed in the box but can be opened to provide cooling airflow when the ambient temperature is high.

DOUBLE ALUMINUM PLATE CHASSIS
The twin aluminum plates of the chassis house and protect all the motorcycle's electronic components while contributing to the Promoto-SM's narrow and realistic appearance. They also provide the chassis with the necessary rigidity and durability in case of strong impacts.

FRONT FORK
The front fork of the Promoto-SM is another innovation from Losi with internal spring and shock absorber. Designed to operate similarly to standard RC shocks, the front fork tubes can be rebuilt and adjusted by changing the silicone shock fluid. Using counter-rotating upper and lower springs, spacers can also be used to adjust the ride height of the Promoto-SM. And perhaps most importantly, they look amazing, just like the real ones.

REAR SUSPENSION WITH RISING RATE TRAVEL
Just like a real motorcycle, the Promoto-SM features an ascending rear suspension. The suspension starts off soft around the riding height for smooth handling and superior grip. It becomes firmer as it moves into the upward travel, providing the right preload for jumps and preventing bottoming out on landings. Equipped with an oil-filled coil shock, the Promoto-SM is ready to dominate any road surface.

BRUSHLESS POWER SYSTEM
The Promoto-SM rolls out of the HOT doors with a powerful Spektrum Smart brushless power system. Its 4-pole 3652 3800Kv motor delivers the power while the 85A brushless ESC provides all the control you need. With top speeds of over 40 mph using a 2S LiPo battery, the Promoto-SM power system is a game-changer!

HEAD ANGLE
After months of testing different trail configurations, head angles, and steering ratios, the Promoto-SM product development team has found the sweet spot. A head tube angle of 62.4 degrees provides the best balance of handling over bumps, landing jumps, steering input, and control of "head shake" across all surfaces.

SLIPPER CLUTCH INSPIRED BY RACING
While its Spektrum Firma 3800Kv brushless motor delivers ample power, the race-inspired dual-disc slipper clutch of the Promoto-SM helps the rear tire maintain traction on a wide variety of surfaces. The dual-disc slipper clutch with a pressurized spring is inspired by those used by the TLR team to win races worldwide. It enhances traction and protects the drivetrain without sacrificing explosiveness.

FRONT CABLE-OPERATED DISC BRAKE
Riding a bike is much more fun when you have good brakes. The engine can manage the rear braking through the transmission, but just like 1:1 motorcycles, most of the braking happens with the front tire. To brake the Promoto-SM from the front, the front brake uses a steel rotor, brake pads activated by a caliper, and a servo-assisted cable. It cuts the braking distance in half.

REALISTIC CHAIN TRANSMISSION
We couldn't call the Promoto-SM a true street racing bike if it weren't chain-driven. Steel links and 70 roller pins wrap around a 10-tooth steel drive sprocket and a 36-tooth aluminum hub sprocket. Regardless of the conditions, the chain drive will efficiently and reliably power the rear tire.

READY TO ROLL
The Losi The Promoto-SM comes fully assembled, featuring a high-quality Spektrum Smart radio system included, with the onboard electronics already installed. AA batteries for the transmitter are even provided! Just add a 2S LiPo battery with an IC5 connector and a compatible charger, and you'll be ready to roll.
Product Specifications
| Approximate assembly time | Less than 1 hour |
| Ball bearings | Complete ball bearings |
| Battery | Sold separately |
| Bodywork | Molded panels in color with immersive graphics |
| Brakes | Front - Cable-operated Piston/Caliper/Rotor, Rear - Motorized Brake |
| Charger | Sold separately |
| Chassis | 3 mm aluminum plate |
| Finish level | Ready to go |
| Type of connector | IC5 |
| Transmission | 1WD |
| Final drive ratio | 12.0:1 |
| Gear pitch | 32 steps |
| Distance to the ground | 2.57 mm |
| Inner diameter of the tire / outer diameter of the wheel | 4.03 / 4.06 in |
| Internal transmission ratio | 4.8:1 |
| LiPo Compatibility | 2S |
| Engine size | 540 |
| Type of engine | Brushless |
| Pine nut | 20T |
| Type of power | Electric |
| Product height | 16.7" (424 mm) |
| Product length | 19.8" (503 mm) |
| Product weight | 129.4 oz (3540 g) |
| Product width | 10.2" (259 mm) |
| Radio | Included |
| Scale | 1/4 |
| Servos | Included |
| Type of shock absorber | 16mm Big Bore aluminum shock absorber |
| Speed control | Included |
| Straight gear | 50T |
| Suspension | Front fork, Rising Rate rear suspension |
| Tire compound | 35S |
| Tread | Supermoto S3 |
| Maximum speed | 40+ |
| Vehicle size | Standard |
| Vehicle type | Motorcycle |
| Wheel width | Front: 28 mm (1.1 in), rear: 36.3 mm (1.4 in) |
| Wheelbase | 13.9" (353 mm) |












































































































