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Osa Flex Electric Motorbike in Grey / 28mph


Color: Grey / 28mph

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This item is available for continental US delivery only.

A workbench, a zippy commuter bike, and a gear hauler all rolled into one

Equipped with a state-of-the-art battery that can not only power the bike, but charge devices, drills, welding machines, and more, The Osa Flex Electric Motorbike is a workhorse on two wheels. Cake Motorbikes pulled out all the stops for this one—it's super light, versatile, and customizable, all without the emissions or fumes of a gas-powered bike.

Please note, this item is excluded from promotional pricing.

What’s Included

  • CAKE Ösa Flex Electric Motorbike
  • Removable Battery
  • Charger
  • Lights and Indicators
  • Rearview mirrors
  • Stand
  • Free CAKE Connect App
  • Toolset for final assembly
  • Service hotline

  • Tough electric motorbike built to carry heavy loads and serve as your mobile workbench
  • Impressive power-to-weight ratio capable of some serious torque
  • State-of-the-art battery comes with integrated outlets to power electronic devices, drills, welding machines and more
  • Removable battery can be charged separately or while installed
  • Integrated SoC indicator and intelligent battery management system for increased safety and performance optimization
  • Built in 5V and 12V outlets to charge phones, laptops, speakers, and more
  • External charger uses standard 110v/220v outlets, gets you from 0% to 80% in two hours, and to 100% in three
  • Compatible with the CAKE Connect App for ultimate control and accessibility
  • Cake's proprietary suspension system, custom designed motorcycle rims, and dual sport motorcycle tires offers a smooth ride
Street Legal Yes
Peak Power 6kW
Weight 212 lbs
License AM, B / Car, M1, M2
Range 87 miles, 140 km
Top Speed 28 mph, 45 km/h
Battery Removable
External Charger Standard 110v/220v outlets
Charging 80% in 2 hours, 100% in 3 hours
Suspension Cake's proprietary suspension
Wheels 19" custom
Tires Sport motorcycle tires
Ride Modes 4
Brake Modes 2
Manufacturing Country Sweden

Head here to check out the manual and videos to help you get started with your Osa Flex Electric Motorbike.

Ride Modes

  • Mode 1: Power—Perfect when navigating crowded roads and speed is not your top priority. It offers you the best range and a top speed of 30km/h, 19mph.
  • Mode 2: Efficiency—This riding mode has a top speed of 45km/h, 28mph – perfect for casual city riding. Best suited for when you don’t want to compromise on neither range or top speed.
  • Mode 3: Reach—While the top speed remains a solid 45km/h, 28mph, more instant energy is made available to ensure the greatest possible acceleration at any given time. Never get left behind at a red light again, ever.
  • Mode 4: Custom—Create your own riding mode to fit your specific needs. Customize your ride mode using the CAKE Connect app.

Braking Modes

  • Mode 1: Turns off motor braking. When you release the throttle, the bike keeps freewheeling.
  • Mode 2: This braking mode activates motor braking. When you release the throttle, you'll gradually slow down.


  • Capacity: 75Ah / 3.75kWh
  • Cells: Premium 21700 lithium cells
  • Features: Easily removable, can be charged when installed in bike or separately. Integrated SoC indicator. Intelligent battery management system for increased safety and performance optimization. Integrated 5V outlet for phones, tablets and other small electronic devices. Integrated 12V outlet for computers, speakers and other medium duty electronic devices
  • Voltage (nominal): 50.4V

Brake Modes

  • Brake Mode 1: Freewheel - No energy regeneration
  • Brake Mode 2: Motor braking - Energy regeneration for maximum range


  • Disc: Stainless steel, 220mm diameter, 3.2mm thickness
  • Type: Motorcycle brake system, four piston calipers. Hand levers for both front- and rear brake.


  • 0-100%: 4 hours
  • Type: External charger for standard 110V/220V outlets


  • Features: Best-in-class power density and state-of-the-art motor control algorithms.


  • Features: TFT display with battery SoC, speedometer, odometer, trip meter, ride mode selection, brake mode selection and telltales.


  • Ground Clearance: 220mm - 8 5/8''
  • Seat Height: 800mm - 31.5''
  • Wheel Base: 1340mm - 52.75''


  • Peak Power: 6kW**
  • Chain/Belt: 420 chain with O-ring
  • Electric Motor: Interior permanent magnet motor
  • Front Sprocket: 15 teeth
  • Nominal Power: 4kW
  • Rear Sprocket: 72 teeth
  • Torque (Motor Axle): 42 Nm
  • Torque (Wheel): 151 Nm
  • Type: Direct drive, chain

Fenders & Bodywork

  • Material: PC/ABS plastic

  • Frame

  • Build: 6061 aluminum, extruded, forged, machined, welded and painted.

Front Suspension

  • Travel: 100 mm
  • Type: Single crown, upside-down spring fork.


  • Interface: 31.8 mm
  • Material: Aerospace grade 7050 aluminum
  • Rise: 80 mm
  • Width: 780 mm

Rear Suspension

  • Type: 260mm shock with adjustable pre-load


  • Classification: L1e-b (EU / Motor-driven cycle (USA)
  • License: AM, B (EU) / Car, M1, M2 (USA)

Ride Modes

  • Ride Mode 1: Power - optimized for top speed and max torque
  • Ride Mode 2: Efficiency - high top speed and long range
  • Ride Mode 3: Reach - limited top speed, max range
  • Ride Mode 4: Custom - create your own riding mode optimized for specific business needs

Speed & Range

  • Range: Mixed city riding 140km
  • Top Speed: 45km/h / 28mph


  • Battery: 26kg
  • Dry: 70kg
  • Max. permissible load: 230kg (bike + battery + rider + passenger + carry-on items)

Wheels & Tires

  • Hubs: Forged and CNC aluminum CAKE hubs with 25mm axle
  • Rims: 14"x2.15" custom designed lightweight motorcycle rims
  • Tires: 14"x4.00" dual sport motorcycle tires


  • *The street legal bikes are homologated for the specific country the bike is delivered to. That means that lights, blinkers and other "street legal necessities" might differ in look, style and dimensions, everything to meet the local regulations. That means that details might look different from the product photo. The specs, such as range, speed and power are not estimated by CAKE. The numbers are the result from the European homologation test, WMTC-II.
  • **Peak power is maximum power the power supply can sustain for a short time.

Email us at [email protected] for sizing guidance or other questions.

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