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WE CHECK THE FIT
We help check rider fit, experience level and intended use if you need guidance choosing the right kids bike.
VIDEO GUIDE
SEE THE BIKE IN ACTION
Use the video to get a clearer sense of the bike’s size, riding position, proportions, controls and overall feel. MotoEbikes can help you check whether the model suits the rider’s height, experience and intended use.
LOOK
SEE MORE THAN PHOTOS SHOW
Use the video to get a clearer sense of the bike’s proportions, riding position, controls, finish and overall size.
FIT
CHECK THE RIDER FIT
Compare the bike with the rider’s height, experience and confidence level, rather than choosing by age alone.
CONFIDENCE
CHOOSE WITH THE DETAILS CLEAR
Check the key details before buying, including size, speed, riding modes, battery, charging, intended use and aftercare support.
PERFORMANCE
POWER, CONTROL AND CONFIDENCE
A beginner-focused electric dirt bike with three progressive speed settings, 400W peak power and a maximum speed of 15.5 mph, designed to let younger riders build confidence gradually.
The right kids bike should feel manageable, confidence-building and appropriate for the rider.
RIDER FIT CHECK
BEST FOR
Young beginners aged approximately 3–6 years and 90–110 cm tall.
CHECK FIRST
Taller, heavier or experienced riders who are ready for the larger SX-E500, SX-E700 or Warrior Youth range.
NEXT STEP
Ask MotoEbikes about sizing if you are unsure which kids bike is the better fit.
PEAK POWER
400W
TORQUE
26 Nm rear-wheel torque
TOP SPEED
15.5 mph
POWER WITH CONTROL
The right kids bike should feel manageable as well as exciting. MotoEbikes can help you check whether the bike’s power, speed and controls suit the rider’s size, experience and intended use.
MOTOR
36V 250W motor with 400W peak output and 26 Nm published rear-wheel torque.
RIDE FEEL
Lightweight, compact and deliberately manageable for younger riders, with a low 460 mm seat height, twist throttle and gradual three-stage performance progression.
CONTROL
Three selectable speed settings: Eco up to 5 mph, Standard up to 7.5 mph and Sport up to 15.5 mph.
BEST FOR
Young beginners approximately 3–6 years old and 90–110 cm tall who are learning balance, throttle control and basic off-road riding.
RANGE AND CHARGING
HOW LONG CAN THEY RIDE?
Up to 11 miles in Eco mode. Expect less range when using higher speed modes or riding on more demanding terrain.
The headline range matters less than whether the bike gives enough riding time for the rider’s normal sessions.
RIDING TIME CHECK
BEST FOR
Typical riding sessions that fit comfortably within the bike’s expected range.
CHECK FIRST
Rider weight, terrain, speed mode, temperature and harder riding can all reduce the real-world range.
NEXT STEP
Ask MotoEbikes if you want help comparing expected riding time, battery size and charge time between kids bikes.
RANGE
Up to 11 miles in
CHARGE TIME
Approx. 2.5 hours
BATTERY
36V 5.2Ah lithium-ion
CHARGE, RIDE, REPEAT
Kids bikes work best when charging is simple. Think about how often the bike will be ridden, where it will be stored and whether it can be recharged easily between riding sessions.
RIDING SESSIONS
Think about how long a normal riding session will be and how easily the bike can be recharged before the next one.
CLAIMED RANGE
RFN claims up to 11 miles in Eco mode, or approximately two hours under its stated brochure conditions.
CHARGING NOTE
RFN publishes an approximate 0–100% charging time of 2.5 hours for the 36V 5.2Ah lithium battery.
BATTERY NOTE
The SX-E400 uses a 36V 5.2Ah lithium battery, providing approximately 187 Wh of nominal battery energy.
REAL WORLD RANGE
Actual riding range will vary with rider weight, terrain, gradients, temperature, tyre pressure, riding mode and throttle use.
BEFORE YOU BUY
MotoEbikes can help you compare range, battery size, charging time and rider fit before you buy.
RIDING AREA & SAFETY
WHERE CAN THIS BIKE BE RIDDEN?
Off-road only. The RFN Warrior Kids SX-E400 is designed for private-land riding and is not homologated for public-road use.
STEP 1
WHERE WILL THEY RIDE?
STEP 2
CHECK THE MODEL
ROAD STATUS
Off road only
RIDER FIT
Young beginners aged approximately 3–6 years and 90–110 cm tall.
TOP SPEED
15.5 mph
SUPERVISION
Use suitable supervision for the rider’s age, experience and the bike’s performance.
This is general guidance, not legal advice. MotoEbikes can help confirm the intended use and rider suitability of the specific model.
Off road only
CHECK BEFORE THEY RIDE
The right riding area and the right rider fit matter just as much as the bike’s headline performance.
RIDING AREA
Use the bike only in a suitable area where riding is permitted.RIDER FIT
Check rider height, experience and confidence against the model before use.PROTECTIVE GEAR
Use appropriate protective equipment and supervision suitable for the rider and bike.ROAD USE
The SX-E400 is not road legal and must not be used on public roads, pavements or other public highways.
RIDER SUITABILITY
Young beginners aged approximately 3–6 years and 90–110 cm tall.
SPECIFICATION
CHECK THE SPECS BEFORE YOU BUY
Check rider fit, size, speed, power, battery, range and chassis details before you buy RFN Warrior Kids Sx-e400.
CURRENT BIKE
RFN Warrior Kids Sx-e400
HIGHLIGHTS
Start with the figures that matter most for rider fit and everyday use.
MotoEbikes can help check rider fit, setup, charging and handover details before you buy.
- Best for
- Young beginners aged approximately 3–6 years and 90–110 cm tall.
- Top speed
- 15.5 mph
- Range
- Up to 11 miles in Eco mode
- Seat height
- 460 mm
- Weight
- 18 kg
RIDER FIT
Check whether the bike suits the rider’s size, experience and confidence.
MotoEbikes can help check rider fit, setup, charging and handover details before you buy.
- Best for
- Young beginners aged approximately 3–6 years and 90–110 cm tall.
- Not ideal for
- Taller, heavier or experienced riders who are ready for the larger SX-E500, SX-E700 or Warrior Youth range.
- Seat height
- 460 mm
- Weight
- 18 kg
PERFORMANCE
Check power, speed and control before choosing this model.
MotoEbikes can help check rider fit, setup, charging and handover details before you buy.
- Motor
- 36V 250W electric motor, 400W peak
- Peak power
- 400W
- Torque
- 26 Nm rear-wheel torque
- Top speed
- 15.5 mph
- Drive
- Direct-drive chain
BATTERY AND RANGE
Check battery size, expected range and charging time.
MotoEbikes can help check rider fit, setup, charging and handover details before you buy.
- Battery
- 36V 5.2Ah lithium-ion
- Battery voltage
- 36 V
- Battery capacity
- 5.2 Ah
- Battery energy
- Approx. 187 Wh
- Range
- Up to 11 miles in Eco mode
- Charge time
- Approx. 2.5 hours
- Charging note
- RFN publishes an approximate 0–100% charging time of 2.5 hours for the 36V 5.2Ah lithium battery.
SIZE AND CHASSIS
Check the bike’s physical size, suspension, brakes and tyres.
MotoEbikes can help check rider fit, setup, charging and handover details before you buy.
- Weight
- 18 kg
- Seat height
- 460 mm
- Front suspension
- RFN spring front suspension, 85 mm stroke
- Rear suspension
- RFN spring rear suspension
- Rear brake
- RFN 140 mm rear disc brake
- Front tyre
- 12-inch front wheel/tyre
- Rear tyre
- 12-inch rear wheel/tyre
USE AND OWNERSHIP
Check where the bike can be used and what support is available after purchase.
MotoEbikes can help check rider fit, setup, charging and handover details before you buy.
- Road status
- Off road only
- Private land
- The RFN Warrior Kids SX-E400 may be ridden on suitable private land with the landowner’s permission. Supervision, suitable protective equipment and an appropriate riding area are strongly recommended.
- Public road
- The SX-E400 is not road legal and must not be used on public roads, pavements or other public highways.
- Warranty
- Manufacturer warranty applies subject to RFN UK’s current terms. RFN states that supplied products are guaranteed against defects in material and workmanship, with repair or replacement for recognised faults. I would not state “24 months” for this model unless RFN confirms that specific term for the Kids range.
- Servicing available
- Yes
- Test ride available
- No – contact MotoEbikes to view the bike and confirm current showroom availability.
- Delivery or collection
- Nationwide UK delivery available.
COMPARE YOUR SHORTLIST
COMPARE THIS KIDS BIKE
Compare kids electric bikes by rider fit, size, speed, power and range to find the model that best suits the rider.
START WITH THIS BIKE
CURRENT BIKE
RFN WARRIOR KIDS SX-E400
RFN WARRIOR KIDS SX-E400 stays locked as BIKE 1. Add other kids bikes to compare rider fit, size and performance side by side.
HOW MANY BIKES DO YOU WANT TO COMPARE?
COMPARING 2 BIKES
BIKE 1
CURRENT BIKE
RFN WARRIOR KIDS SX-E400
FAQ
QUESTIONS, ANSWERED PLAINLY
Use these answers to check rider fit, speed, range, charging, riding area, parts and aftercare for RFN Warrior Kids Sx-e400.
CURRENT BIKE
RFN Warrior Kids Sx-e400
Check rider fit, seat height, top speed, power, weight, range, charge time and intended riding area. The right kids bike should suit the rider’s size, experience and confidence, not age alone.
That depends on the rider’s height, previous riding experience, confidence and the bike’s performance. Compare the Best for, Not ideal for, seat height, top speed and power details on this page, or ask MotoEbikes for sizing help.
Use protective equipment appropriate to the rider, bike and riding area. A suitable helmet is essential, and off-road riders commonly use additional protection such as gloves, boots and body protection. Supervision should match the rider’s age and experience.
Yes. Use the MotoEbikes kids-bike comparison on this page to compare rider fit, seat height, top speed, peak power, weight, range and charge time across suitable models.
Young beginners aged approximately 3–6 years and 90–110 cm tall. It may not be ideal for Taller, heavier or experienced riders who are ready for the larger SX-E500, SX-E700 or Warrior Youth range..
The published top speed is 15.5 mph. Published peak power is 400W. Three selectable speed settings: Eco up to 5 mph, Standard up to 7.5 mph and Sport up to 15.5 mph.
The published range is Up to 11 miles in Eco mode. The published charge time is Approx. 2.5 hours. Real-world range varies with rider weight, terrain, speed mode, temperature and riding style.
Off-road only. The RFN Warrior Kids SX-E400 is designed for private-land riding and is not homologated for public-road use. The RFN Warrior Kids SX-E400 may be ridden on suitable private land with the landowner’s permission. Supervision, suitable protective equipment and an appropriate riding area are strongly recommended.
MotoEbikes supplies kids electric bikes from Guildford, Surrey, and can help with rider sizing, model choice, setup and aftercare before you buy. Nationwide UK delivery available.
Replacement parts and aftersales support are available for the RFN Warrior Kids range. Contact MotoEBikes for help with servicing, replacement parts and maintenance enquiries.
REAL SHOWROOM SUPPORT
A PROPER HANDOVER, NOT A BLIND BOX SALE
A real showroom gives you somewhere to ask questions, check the bike and understand the next step before you commit.
Showroom and aftercare
Do not buy from a spec sheet alone
Contact MotoEBikes in Guildford to confirm whether the RFN Warrior Kids SX-E400 is available to view. We can also help parents compare the SX-E400 with the SX-E500 and SX-E700 to choose the correct size...
Visit us
See it in person in Guildford, Surrey.
Check the fit, ask questions and compare options before you reserve.
TEST RIDE
No – contact MotoEbikes to view the bike and confirm current showroom availability.
Availability depends on the model, licence position and rider eligibility.
SERVICING
In-house workshop keeps you moving.
Setup, checks, maintenance advice and support routes can be explained.
AFTERCARE
MotoEBikes can assist with RFN parts, maintenance and aftersales enquiries. RFN UK maintains a dedicated Warrior parts catalogue, including parts for the SX-E400.
You know who to contact after handover if you need practical help.
WHY IT MATTERS
Licence, charging, finance, setup and handover are checked before completion so you are not left guessing after you reserve.
COMPARE BEFORE YOU CHOOSE
OTHER KIDS BIKES TO CONSIDER
Before you buy RFN Warrior Kids Sx-e400, compare a few suitable alternatives. The right kids bike should fit the rider’s height, experience, confidence and intended use — not just their age or the headline speed.
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Talaria
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£799.00
BEST FOR
Children aged 4–6 looking for their first electric ...
SEAT HEIGHT
Adjustable 45–52 cm
TOP SPEED
10 mph
RANGE
Up to 9 miles