RFN Warrior Kids SX-E400
£ 499.00
Built for adventure, the RFN Warrior SX-E400 is a high-performance 36V electric dirt bike designed for children ready to explore beyond the pavement. Whether they're just learning or already chasing thrills, the SX-E400 adapts with three speed settings, responsive handling, and durable construction.
Finance Example
License requirements
Bike category
Minimum age
Minimum Requirements for license
Delivery
UK Mainland Delivery – £19.99 (2–3 Working Days)
Your bike will arrive boxed and will require some assembly. If you prefer, you can select Store Collection at checkout instead.
Warranty
All RFN Warrior kids bikes are covered by a limited 12 month warranty. This limited warranty does NOT cover normal wear and tear parts, bearings, tyres, tubes, chains, sprockets, cables or any damage, failure or loss caused by improper assembly, maintenance, storage or use of the RFN product.
Warranty is a PARTS ONLY WARRANTY, It does NOT include labour. If the bike needs to be repaired by us, the bike needs to be returned to us (the place of purchase) at the CUSTOMERS cost.
The full details
RFN Warrior SX-E400 – 36V Electric Dirt Bike for Kids
Built for adventure, the RFN Warrior SX-E400 is a high-performance 36V electric dirt bike designed for children ready to explore beyond the pavement. Whether they're just learning or already chasing thrills, the SX-E400 adapts with three speed settings, responsive handling, and durable construction.
Offering up to 11.5 miles or 75 minutes of run time, this electric bike is perfect for extended off-road fun. Equipped with 12 x 2.4" all-terrain tyres, front and rear suspension, and a tough steel frame, it’s built to tackle everything from garden paths to rugged trails.

Expert-Level Performance
Powered by a 250W brushless motor with a 400W peak output and an advanced sine wave controller, the SX-E400 delivers smooth, controlled acceleration. The removable 36V 5.2Ah lithium battery allows for easy swaps—so the adventure doesn’t have to end when the charge does.

Key Features:
- 3 speed modes for parental control:
- Eco: 5 mph
- Low: 8 mph
- Sport: 15.5 mph
- Up to 11.5 miles or 75 minutes of ride time
- 36V 5.2Ah removable lithium battery
- 250W brushless motor with 400W peak output
- Maximum rider weight: 50 kg (7.7 stone)
- Front and rear suspension for a smoother ride
- Durable steel frame built for off-road conditions
- Lightweight at only 18 kg – easy to lift and transport
- 12 x 2.4” all-terrain tyres for multi-surface grip
- Mechanical disc brakes for reliable stopping power
Whether it’s their first dirt bike or a next-level upgrade, the RFN Warrior SX-E400 delivers the performance, safety, and thrill young riders need to build skills and confidence.
Specifications
General
- Rider Age: 4 - 8 years
- Top Speed: 18.5mph
- Charge time: 2 - 3 hours
- Range: 11 miles
Frame
- Seat Height - 490mm
- Wheelbase - 685mm
- Overall - 1044 x 578 x 676 mm
- Weight - 19kg
- Wheels & Tyres - 12" Aluminium- Magnesium Alloy with All Terrain Tyres
- Suspension - Front Spring fork, Rear Adjustable Spring Shock Absorber
- Frame - Steel
- Handlebars - Aluminium
Electronic System
- Battery - 36v 5.2ah
- Lithium Display - 3 Stage Battery level indicator
- On/Off Button with speed mode setting cover for parental control
- Magnetic Saftey Kill Switch
- Sinewave controller
Drive
- Brushless Drive train Motor
- 500w Electric Motor
- Front and Rear Mechanical Disc brake - 140mm Disc