Description
Fresh styling and key feature updates combine with proven Promoto mechanical and electronic technologies to make the Losi Promoto-SM an RC motorcycle that excels on-road — bringing supermoto looks and performance to the tarmac.
Key Features:
- Fully assembled and ready-to-run — only battery and charger required
- Updated lean bar position and wheels with bearings
- New front brake caliper and piston
- Supermoto-style SM street tires on smaller wheels
- Supermoto front fender and hand guards
- Officially licensed FXR graphics
- Patent-pending Spektrum MS6X technology
- Frame-integrated, high-RPM flywheel
- Rising rate rear suspension
- Powerful brushless system with 40+ mph speeds
- Dirt, Street, and Wheelie Control drive modes
- Collapsible front crash structure
- Realistic rider figure with authentic riding gear
- Functional, cable-driven front disc brake
- Chain drive with dual disc performance slipper clutch
- Hands-free starting stand included
- Keyed bike stand included
What’s In The Box?
- (1) Losi Promoto-SM 1/4 Supermoto Motorcycle RTR FXR
- (1) Spektrum Smart DX3PM Transmitter
- (4) AA Transmitter Batteries
- (1) Spektrum 5000mAh 2S 7.4V Smart G2 50C LiPo Battery with IC5 Connector
- (1) IC5 Device to IC3 Battery Adapter
- (1) Spektrum Smart S120 USB-C Charger, 1x20W
- (1) Bike Stand
- (1) Starting Stand
- (1) Product Manual
- (1) Quick Start Guide
- (1) Chain Lube
- Tuning Parts
- Fork and Shock Tools
Required for Operation (Not Included)
- Nothing. Everything you need is included in the box!
Overview:
Powering off the line, speeding down straights, and leaning through curves and turns, a unique harmony develops between a bike and its rider. The two intuitively become one. Despite its power, the two-wheeler feels light and nimble as it reacts instantly to your cues — as if it’s simply an extension of you.
That’s also how it feels to drive Losi Promoto RC bikes.
The Losi Promoto-MX was the first RC dirt bike to accurately reproduce the full experience and pure fun of riding a real motorcycle. Now, for on-road RC and motorcycle fans, Losi presents the Promoto-SM — the most authentic supermoto experience ever offered in a radio-control bike.
The Promoto-SM is particularly well-suited for concrete, asphalt, blacktop, and other hard surfaces found at neighborhood streets, local parks, and parking lots. Key differences from the Promoto-MX include new Pro-Line Racing OE (Original Equipment) SM street tires on smaller wheels, a more powerful front brake caliper, and revised lean bar wheels. The Promoto-SM can lean farther than its dirt bike counterpart, and the lean bar tires decrease noise and offer better traction on hard surfaces.
The Losi Promoto-SM also looks like a true supermoto bike. Its distinctive visual details include hand guards, shortened front fender, and officially licensed FXR graphics and rider gear.
What the Promoto-SM shares with the breakthrough Promoto-MX is an innovative blend of mechanical and electronic technology that work together to provide a realistic experience that no other RC bike can touch. The electronics include a 2700Kv motor and steel flywheel that are both mounted in the center of the frame. The motor spins the flywheel at over 22,000 rpm to create a gyroscopic force for unparalleled stability. Patent-pending Spektrum MS6X technology takes your input from the Spektrum DX3PM transmitter and commands the Promoto-SM to lean, turn, and wheelie with unprecedented balance and finesse.
The mechanical technology is equally impressive. Losi’s product development team studied full-size motorcycle suspension geometry to give Promoto RC bikes the same terrain handling characteristics. A rising rate rear suspension provides superior grip and prevents bottoming out in landings. Their completely new front fork design, with an internal spring and dampener, can be tuned by changing the silicone dampening fluid and also allows ride height adjustments. An innovative front and rear wheel braking system adds impressive stopping power, cutting the stopping distance in half compared to rear brake only.
Both technologies, electronic and mechanical, are why the Promoto platform performs better at high and low speeds than any previous RC motorcycle. Now, with the Losi Promoto-SM, there’s an RC bike that really works — with tarmac-ready performance and style!
Technical Specifications:
| Approximate Assembly Time | Less than 1 Hour |
| Ball Bearings | Full Ball Bearings |
| Battery | Sold Separately |
| Body | Color Molded Panels with Wrap Graphics |
| Brakes | Front – Cable Driven Piston/Caliper/Rotor, Rear – Motor Braking |
| Charger | Sold Separately |
| Chassis | 3mm Aluminum Plate |
| Completion Level | Ready-To-Run |
| Connector Type | IC5 |
| Drivetrain | 1WD |
| Final Drive Ratio | 12.0:1 |
| Gear Pitch | 32-pitch |
| Ground Clearance | 2.2 in (57mm) |
| Inner Tire / Outer Wheel Diameter | 4.03 / 4.06 in |
| Internal Gear Ratio | 4.8:1 |
| LiPo Compatibility | 2S |
| Motor Size | 540 |
| Motor Type | Brushless |
| Pinion | 20T |
| Power Type | Electric |
| Product Height | 16.7″ (424 mm) |
| Product Length | 19.8″ (503 mm) |
| Product Weight | 129.4 oz (3540g) |
| Product Width | 10.2″ (259 mm) |
| Radio | Included |
| Scale | 1/4 |
| Servos | Included |
| Shock Type | 16mm Big Bore Aluminum Shock |
| Speed Control | Included |
| Spur Gear | 50T |
| Suspension | Front Fork, Rising Rate Rear Suspension |
| Tire Compound | 35S |
| Tire Tread | Supermoto S3 |
| Top Speed | 40+ |
| Vehicle Size | Standard |
| Vehicle Type | Motorcycle |
| Wheel Width | Front – 1.1 in (28mm), Rear – 1.4 in (36.3mm) |
| Wheelbase | 13.9″ (353 mm) |
