Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR Basic, White LOS-2272

    Description

    Losi 1/4 Promoto-SM FXR Supermoto RC Motorcycle RTR 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!

    Losi 1/4 Promoto-SM FXR Supermoto RC Motorcycle RTR Features

    • 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
    UPDATED LEAN BARS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    UPDATED LEAN BARS

    The Promoto-SM lean bar positioning has been updated so it can lean farther than its dirt bike counterpart. New rubber lean bar tires, mounted on bearings, reduce noise and offer better traction on hard surfaces. Adjustable stops are included for up and down travel, so you can dial in the bike for any surface or grip level. The lean bars also often help with crash recovery when the rear tire has traction. If the bike is down on the track, simply hit the throttle to stand it upright and resume driving.

    PATENT-PENDING SPEKTRUM MS6X TECHNOLOGY for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    PATENT-PENDING SPEKTRUM MS6X TECHNOLOGY

    The included Spektrum DX3PM transmitter and SR6300PM receiver combine with patent-pending MS6X technology for 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 cornering angles, use the MS6X knob to increase the lean angle.

    ON THE FLY DRIVE MODES for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    “ON THE FLY” DRIVE MODES

    The DX3PM has three preprogrammed drive modes that you can toggle between “on the fly” using your thumb on the A/B rocker switch.

    • Dirt Mode — Allows the Promoto-SM to pitch up enough without clipping the throttle for going up jump faces and obstacles, but helps prevent “wheelie-overs” by intuitively clipping the throttle output if the bike begins to pitch up too far.
    • Street Mode — Senses when the Promoto-SM starts to pitch up and clips the throttle quickly, getting the front tire back on the ground to accelerate as much as possible.
    • Wheelie Control — Let 'em rip! Wheelie Control lets you hold wheelies on smooth surfaces all the way to top speed.
    SMART TECHNOLOGY for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    SMART TECHNOLOGY

    How much battery life is left on your bike? You don't have to guess. LED indicators on the DX3PM transmitter show you the remaining capacity of your Spektrum Smart batteries at glance! Using Spektrum Smart Technology, the Promoto-SM stores and shares critical performance data while you run. Smart technology also simplifies battery charging. When you connect a Smart battery to a Spektrum Smart charger, the battery's unique charging requirements upload automatically from its memory microchip through the IC connector's data wire to the Smart charger. Safe charging begins automatically! (You can receive additional telemetry information in real-time, such as speed, RPM, amp draw, ESC temperature, and more, by upgrading to the Spektrum DX5C or DX5 Pro transmitter.)

    UPDATED BRAKE CALIPERS & PISTON for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    UPDATED BRAKE CALIPERS & PISTON

    Although the original Promoto-MX front brake system worked well, the design team thought that improvements could be made. An all-new caliper and floating piston were designed to apply a larger pressure area to the brake pad. Also, a new Metal Injection Molded (MIM) piston shaft is installed on the bearings for smoother operation and a better seal again dust and debris. All of this adds up to a shorter stopping distance and more consistent braking operation.

    FLYWHEEL UNIT for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    FLYWHEEL 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 as far forward as possible in the frame, the flywheel unit enables the Promoto-SM to pivot around its center point to improve jumping, changes of direction, and the accuracy of the bike's performance.

    HEAD DAMPING for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    HEAD DAMPING

    With eight pounds rapidly powering down the track, it takes quite a stiff servo saver spring setup to properly guide the Promoto-SM into the next turn. Like anything heavily sprung, the best way to control the 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 head tube bearings. The chamber is filled with heavy 500,000cSt which dampens the servo saver well and helps to control any possible "head shake.”

    SERVO SAVER for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    SERVO SAVER

    The servo saver's stiff circular springs, captured by bearing-mounted composite plates, 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 setting down from wheelies, landing from jumps, power sliding through a turn, and pushing the front tire over a curb. It gives so the bike stays up.

    ELECTRONICS INCLUDED for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    ELECTRONICS INCLUDED
    • Transmitter (Spektrum DX3PM Smart DSMR)
    • Receiver (Spektrum 6-Channel DSMR Promoto 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 & ESC Assembly / Spektrum Motorcycle Flywheel Assembly)
    • Electronic Speed Control (Spektrum Firma 85A Brushless Smart Motorcycle ESC)
    NARROW CHASSIS  for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    NARROW CHASSIS

    To capture the proper scale looks, the bike's electronics and battery all had to fit within a compact, narrow chassis. Requiring a special “shorty” battery would have made the design task simple, but the Promoto-SM product development team wanted to use a more convenient, standard size battery. Mission accomplished! A full-size 2S hardcase LiPo fits within the rider's seat, easy to access for quick battery changes. Pop in a charged pack and you're back in seconds to leading your competition.

    REALISTIC RIDER FIGURE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    REALISTIC RIDER FIGURE

    The rider figures of other RC motorcycles are made entirely of foam, which quickly fails. Promoto riders have a rubberized plastic exterior that can give and flex under impacts and flips. To keep the rider from bobbling around on the bike, the torso has a foam insert. It keeps the body firm during normal operation but still able to give under impact. With its updated gear, the Promoto-SM rider looks ready for aggressive on-road racing action!

    PRO-LINE RACING OE (ORIGINAL EQUIPMENT) SUPERMOTO STREET TIRES  for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    PRO-LINE RACING OE (ORIGINAL EQUIPMENT) SUPERMOTO STREET TIRES

    The Promoto-SM is outfitted with new Pro-Line Racing OE (Original Equipment) Supermoto street tires. In addition to complementing the bike's scale looks, the Supermoto tires are designed specifically for the unique wear and traction requirements of supermoto-style road racing.

    DISPLAY/MAINTENANCE & STARTING STANDS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    DISPLAY/MAINTENANCE & STARTING STANDS

    Working on a real bike is easier with a proper bike stand. So the Promoto-SM had to have one, too! The included stand for maintenance and display is modeled after a real bike stand, complete with graphics. To keep the bike balanced on the stand, the Promoto-SM keys into the bike stand. But taking it a step further, a hands-free starting stand is also included. This starting stand cradles the rear tire and holds the bike upright and ready for a gate-style start.

    TRUE-SPOKE WHEELS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    TRUE-SPOKE WHEELS

    Before Losi introduced the Promoto platform, no other manufacturers had been able to create proper-looking spoked wheels with the durability needed for an RC bike. It took the determination and expertise of the Losi product development team to make it happen. For the Promoto-SM, the realistic, true-spoke wheels are smaller, in keeping with the design of real on-road motorcycles.

    PLASTICS WITH GRAPHICS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    PLASTICS WITH GRAPHICS

    Big or small, no street bike would look right without a proper body panel kit wrapped in vinyl graphics. The Promoto-SM has all the goods — fenders, number plate, fork guards, front and rear side panels — all looking fresh wrapped in updated, highly durable vinyl graphics.

    REALISTIC DETAILS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    REALISTIC DETAILS

    Even tiny touches matter, and Losi hasn't overlooked a thing — exhaust, brake line, foot pegs, brake rotors, you name it. The Promoto-SM also includes hand guards, recreating those used on full-size supermoto bikes to protect the brake and clutch levers during a fall.

    REAR FENDER for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    REAR FENDER

    Wheelies happen. A normal, rigid-mounted rear fender would really take a beating. But the Promoto-SM has the solution — a hinged elastomer sprung rear fender that can deflect out of the way during wheelies to expose a durable nylon rear bumper. It substantially increases the durability of the rear fender.

    FRONT CRASH STRUCTURE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    FRONT CRASH STRUCTURE

    The front crash structure of the Promoto-SM is rigid during normal running, but compresses until the front tire bottoms into the chassis frame to absorb front impacts. That protects the front fork tubes from bending, keeping them safe and true.

    SKID PLATES & AIR VENTS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    SKID PLATES & AIR VENTS

    Molded composite skid plates line the front and bottom of the Promoto-SM chassis. They offer protection during crashes and keep debris out of the chassis, helping to protect the electronics mounted inside. The air vents on each side of the bike come closed in the box, but can be opened to provide cooling airflow when ambient temperatures are high.

    TWIN ALUMINUM PLATE CHASSIS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    TWIN ALUMINUM PLATE CHASSIS

    Twin aluminum chassis plates house and protect all of the bike's electronics and help to give the Promoto-SM its realistically narrow appearance. They also give the frame the rigidity and durability required for harsh impacts.

    FRONT FORK for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    FRONT FORK

    The front fork of the Promoto-SM is another Losi innovation with an internal spring and dampener. Designed to work similar to normal RC shocks, the front fork tubes can be rebuilt and tuned by changing the silicone dampening fluid. Using counter-wound upper and lower springs, spacers can be used to adjust the ride height of the Promoto-SM as well. And maybe most importantly, they look awesome — just like the real deal.

    RISING RATE REAR SUSPENSION for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    RISING RATE REAR SUSPENSION

    Just like a real bike, the Promoto-SM has a rising rate rear suspension. The suspension starts soft around ride height, for smooth handling and a superior grip. It becomes firmer as it gets deeper into up travel, to provide proper preload on jumps and prevent bottoming out in landings. Dialed in with a full oil-filled coil-over shock, the Promoto-SM is ready to rip over any on-road surface.

    BRUSHLESS POWER SYSTEM  for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    BRUSHLESS POWER SYSTEM

    The Promoto-SM comes out of the gates HOT with a powerful Spektrum Smart brushless power system. Its 4-pole 3652 3800Kv motor puts down the power while the 85A brushless ESC adds all the control you need. With massive 40+ mph top speeds on a 2S LiPo battery, the Promoto-SM power system rips!

    HEAD ANGLE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    HEAD ANGLE

    After months of testing different trail settings, head angle, and steering ratios, the Promoto-SM product development team found the sweet spot. A head tube angle of 62.4 degrees gives it the best balance of bump handling, landing jumps, steering input, and “head shake” control on all surfaces.

    RACE-INSPIRED SLIPPER CLUTCH for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    RACE-INSPIRED SLIPPER CLUTCH

    As its 3800Kv Spektrum Firma Brushless motor puts out abundant power, the Promoto-SM's race inspired dual disc slipper clutch helps the rear tire maintain traction on a variety of surfaces. The dual pad, spring pressurized slipper clutch takes inspiration from those that the TLR team uses to win races across the globe. It increases traction and protects the drivetrain without sacrificing explosive drive.

    FRONT CABLE-DRIVEN DISC BRAKE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    FRONT CABLE-DRIVEN DISC BRAKE

    Hauling on your bike is a lot more fun when you've got good brakes. The motor can handle rear braking through the drivetrain, but like 1:1 motorcycles, most of the braking happens with the front tire. To slow the Promoto-SM down from the front, the front brake uses a steel rotor, caliper-actuated brake pads, and servo-driven cable. It cuts your stopping distance in half.

    REALISTIC CHAIN DRIVE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    REALISTIC CHAIN DRIVE

    We could not call the Promoto-SM a true street racing bike if wasn'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 conditions, the chain drive will drive the rear tire efficiently and reliably.

    READY-TO-RUN for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
    READY-TO-RUN

    The Losi Promoto-SM comes fully assembled, with a high-quality Spektrum Smart radio system included and on-board electronics already installed. Even AA transmitter batteries are supplied! Just add a 2S LiPo battery with IC5 plug and a compatible charger and you're ready to ride.

    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)
    Product form

    SKU: EB-156710631212
    Barcode: 660132628758

    Free pickup in our shop(s)

    4 in stock Ships within 24hr of Purchase

    $549.99

      • Guaranteed secure & safe checkout.

        shop pay
      • Free shipping on orders over $150
      Pay whenever you want

      Easily pay within 30 days after you have received your package.
      Read more

      Description

      Losi 1/4 Promoto-SM FXR Supermoto RC Motorcycle RTR 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!

      Losi 1/4 Promoto-SM FXR Supermoto RC Motorcycle RTR Features

      • 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
      UPDATED LEAN BARS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      UPDATED LEAN BARS

      The Promoto-SM lean bar positioning has been updated so it can lean farther than its dirt bike counterpart. New rubber lean bar tires, mounted on bearings, reduce noise and offer better traction on hard surfaces. Adjustable stops are included for up and down travel, so you can dial in the bike for any surface or grip level. The lean bars also often help with crash recovery when the rear tire has traction. If the bike is down on the track, simply hit the throttle to stand it upright and resume driving.

      PATENT-PENDING SPEKTRUM MS6X TECHNOLOGY for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      PATENT-PENDING SPEKTRUM MS6X TECHNOLOGY

      The included Spektrum DX3PM transmitter and SR6300PM receiver combine with patent-pending MS6X technology for 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 cornering angles, use the MS6X knob to increase the lean angle.

      ON THE FLY DRIVE MODES for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      “ON THE FLY” DRIVE MODES

      The DX3PM has three preprogrammed drive modes that you can toggle between “on the fly” using your thumb on the A/B rocker switch.

      • Dirt Mode — Allows the Promoto-SM to pitch up enough without clipping the throttle for going up jump faces and obstacles, but helps prevent “wheelie-overs” by intuitively clipping the throttle output if the bike begins to pitch up too far.
      • Street Mode — Senses when the Promoto-SM starts to pitch up and clips the throttle quickly, getting the front tire back on the ground to accelerate as much as possible.
      • Wheelie Control — Let 'em rip! Wheelie Control lets you hold wheelies on smooth surfaces all the way to top speed.
      SMART TECHNOLOGY for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      SMART TECHNOLOGY

      How much battery life is left on your bike? You don't have to guess. LED indicators on the DX3PM transmitter show you the remaining capacity of your Spektrum Smart batteries at glance! Using Spektrum Smart Technology, the Promoto-SM stores and shares critical performance data while you run. Smart technology also simplifies battery charging. When you connect a Smart battery to a Spektrum Smart charger, the battery's unique charging requirements upload automatically from its memory microchip through the IC connector's data wire to the Smart charger. Safe charging begins automatically! (You can receive additional telemetry information in real-time, such as speed, RPM, amp draw, ESC temperature, and more, by upgrading to the Spektrum DX5C or DX5 Pro transmitter.)

      UPDATED BRAKE CALIPERS & PISTON for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      UPDATED BRAKE CALIPERS & PISTON

      Although the original Promoto-MX front brake system worked well, the design team thought that improvements could be made. An all-new caliper and floating piston were designed to apply a larger pressure area to the brake pad. Also, a new Metal Injection Molded (MIM) piston shaft is installed on the bearings for smoother operation and a better seal again dust and debris. All of this adds up to a shorter stopping distance and more consistent braking operation.

      FLYWHEEL UNIT for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      FLYWHEEL 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 as far forward as possible in the frame, the flywheel unit enables the Promoto-SM to pivot around its center point to improve jumping, changes of direction, and the accuracy of the bike's performance.

      HEAD DAMPING for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      HEAD DAMPING

      With eight pounds rapidly powering down the track, it takes quite a stiff servo saver spring setup to properly guide the Promoto-SM into the next turn. Like anything heavily sprung, the best way to control the 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 head tube bearings. The chamber is filled with heavy 500,000cSt which dampens the servo saver well and helps to control any possible "head shake.”

      SERVO SAVER for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      SERVO SAVER

      The servo saver's stiff circular springs, captured by bearing-mounted composite plates, 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 setting down from wheelies, landing from jumps, power sliding through a turn, and pushing the front tire over a curb. It gives so the bike stays up.

      ELECTRONICS INCLUDED for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      ELECTRONICS INCLUDED
      • Transmitter (Spektrum DX3PM Smart DSMR)
      • Receiver (Spektrum 6-Channel DSMR Promoto 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 & ESC Assembly / Spektrum Motorcycle Flywheel Assembly)
      • Electronic Speed Control (Spektrum Firma 85A Brushless Smart Motorcycle ESC)
      NARROW CHASSIS  for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      NARROW CHASSIS

      To capture the proper scale looks, the bike's electronics and battery all had to fit within a compact, narrow chassis. Requiring a special “shorty” battery would have made the design task simple, but the Promoto-SM product development team wanted to use a more convenient, standard size battery. Mission accomplished! A full-size 2S hardcase LiPo fits within the rider's seat, easy to access for quick battery changes. Pop in a charged pack and you're back in seconds to leading your competition.

      REALISTIC RIDER FIGURE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      REALISTIC RIDER FIGURE

      The rider figures of other RC motorcycles are made entirely of foam, which quickly fails. Promoto riders have a rubberized plastic exterior that can give and flex under impacts and flips. To keep the rider from bobbling around on the bike, the torso has a foam insert. It keeps the body firm during normal operation but still able to give under impact. With its updated gear, the Promoto-SM rider looks ready for aggressive on-road racing action!

      PRO-LINE RACING OE (ORIGINAL EQUIPMENT) SUPERMOTO STREET TIRES  for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      PRO-LINE RACING OE (ORIGINAL EQUIPMENT) SUPERMOTO STREET TIRES

      The Promoto-SM is outfitted with new Pro-Line Racing OE (Original Equipment) Supermoto street tires. In addition to complementing the bike's scale looks, the Supermoto tires are designed specifically for the unique wear and traction requirements of supermoto-style road racing.

      DISPLAY/MAINTENANCE & STARTING STANDS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      DISPLAY/MAINTENANCE & STARTING STANDS

      Working on a real bike is easier with a proper bike stand. So the Promoto-SM had to have one, too! The included stand for maintenance and display is modeled after a real bike stand, complete with graphics. To keep the bike balanced on the stand, the Promoto-SM keys into the bike stand. But taking it a step further, a hands-free starting stand is also included. This starting stand cradles the rear tire and holds the bike upright and ready for a gate-style start.

      TRUE-SPOKE WHEELS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      TRUE-SPOKE WHEELS

      Before Losi introduced the Promoto platform, no other manufacturers had been able to create proper-looking spoked wheels with the durability needed for an RC bike. It took the determination and expertise of the Losi product development team to make it happen. For the Promoto-SM, the realistic, true-spoke wheels are smaller, in keeping with the design of real on-road motorcycles.

      PLASTICS WITH GRAPHICS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      PLASTICS WITH GRAPHICS

      Big or small, no street bike would look right without a proper body panel kit wrapped in vinyl graphics. The Promoto-SM has all the goods — fenders, number plate, fork guards, front and rear side panels — all looking fresh wrapped in updated, highly durable vinyl graphics.

      REALISTIC DETAILS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      REALISTIC DETAILS

      Even tiny touches matter, and Losi hasn't overlooked a thing — exhaust, brake line, foot pegs, brake rotors, you name it. The Promoto-SM also includes hand guards, recreating those used on full-size supermoto bikes to protect the brake and clutch levers during a fall.

      REAR FENDER for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      REAR FENDER

      Wheelies happen. A normal, rigid-mounted rear fender would really take a beating. But the Promoto-SM has the solution — a hinged elastomer sprung rear fender that can deflect out of the way during wheelies to expose a durable nylon rear bumper. It substantially increases the durability of the rear fender.

      FRONT CRASH STRUCTURE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      FRONT CRASH STRUCTURE

      The front crash structure of the Promoto-SM is rigid during normal running, but compresses until the front tire bottoms into the chassis frame to absorb front impacts. That protects the front fork tubes from bending, keeping them safe and true.

      SKID PLATES & AIR VENTS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      SKID PLATES & AIR VENTS

      Molded composite skid plates line the front and bottom of the Promoto-SM chassis. They offer protection during crashes and keep debris out of the chassis, helping to protect the electronics mounted inside. The air vents on each side of the bike come closed in the box, but can be opened to provide cooling airflow when ambient temperatures are high.

      TWIN ALUMINUM PLATE CHASSIS for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      TWIN ALUMINUM PLATE CHASSIS

      Twin aluminum chassis plates house and protect all of the bike's electronics and help to give the Promoto-SM its realistically narrow appearance. They also give the frame the rigidity and durability required for harsh impacts.

      FRONT FORK for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      FRONT FORK

      The front fork of the Promoto-SM is another Losi innovation with an internal spring and dampener. Designed to work similar to normal RC shocks, the front fork tubes can be rebuilt and tuned by changing the silicone dampening fluid. Using counter-wound upper and lower springs, spacers can be used to adjust the ride height of the Promoto-SM as well. And maybe most importantly, they look awesome — just like the real deal.

      RISING RATE REAR SUSPENSION for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      RISING RATE REAR SUSPENSION

      Just like a real bike, the Promoto-SM has a rising rate rear suspension. The suspension starts soft around ride height, for smooth handling and a superior grip. It becomes firmer as it gets deeper into up travel, to provide proper preload on jumps and prevent bottoming out in landings. Dialed in with a full oil-filled coil-over shock, the Promoto-SM is ready to rip over any on-road surface.

      BRUSHLESS POWER SYSTEM  for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      BRUSHLESS POWER SYSTEM

      The Promoto-SM comes out of the gates HOT with a powerful Spektrum Smart brushless power system. Its 4-pole 3652 3800Kv motor puts down the power while the 85A brushless ESC adds all the control you need. With massive 40+ mph top speeds on a 2S LiPo battery, the Promoto-SM power system rips!

      HEAD ANGLE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      HEAD ANGLE

      After months of testing different trail settings, head angle, and steering ratios, the Promoto-SM product development team found the sweet spot. A head tube angle of 62.4 degrees gives it the best balance of bump handling, landing jumps, steering input, and “head shake” control on all surfaces.

      RACE-INSPIRED SLIPPER CLUTCH for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      RACE-INSPIRED SLIPPER CLUTCH

      As its 3800Kv Spektrum Firma Brushless motor puts out abundant power, the Promoto-SM's race inspired dual disc slipper clutch helps the rear tire maintain traction on a variety of surfaces. The dual pad, spring pressurized slipper clutch takes inspiration from those that the TLR team uses to win races across the globe. It increases traction and protects the drivetrain without sacrificing explosive drive.

      FRONT CABLE-DRIVEN DISC BRAKE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      FRONT CABLE-DRIVEN DISC BRAKE

      Hauling on your bike is a lot more fun when you've got good brakes. The motor can handle rear braking through the drivetrain, but like 1:1 motorcycles, most of the braking happens with the front tire. To slow the Promoto-SM down from the front, the front brake uses a steel rotor, caliper-actuated brake pads, and servo-driven cable. It cuts your stopping distance in half.

      REALISTIC CHAIN DRIVE for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      REALISTIC CHAIN DRIVE

      We could not call the Promoto-SM a true street racing bike if wasn'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 conditions, the chain drive will drive the rear tire efficiently and reliably.

      READY-TO-RUN for the Losi 1/4 Promoto-SM FXR Supermoto RTR RC Motorcycle
      READY-TO-RUN

      The Losi Promoto-SM comes fully assembled, with a high-quality Spektrum Smart radio system included and on-board electronics already installed. Even AA transmitter batteries are supplied! Just add a 2S LiPo battery with IC5 plug and a compatible charger and you're ready to ride.

      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)

      Recently viewed products

        © 2026 Auer Ace Hobbies, Powered by Shopify

          • American Express
          • Apple Pay
          • Diners Club
          • Discover
          • Google Pay
          • Mastercard
          • PayPal
          • Shop Pay
          • Visa

          Login

          Forgot your password?

          Don't have an account yet?
          Create account