Quick verdict: The RFN Warrior SX-E500 is the best all-round model in the RFN Warrior Kids range for many growing riders, combining manageable performance, 14-inch wheels, proper suspension and three adjustable speed settings.
Best for: confident riders aged around 4–7 and approximately 100–120cm tall who have moved beyond a smaller electric balance bike and want a proper electric motocross-style bike.
RFN Warrior SX-E500 Review
The RFN Warrior SX-E500 sits in the middle of the RFN Warrior Kids electric dirt-bike range, positioned between the smaller SX-E400 and the more powerful SX-E700.
For many families, that makes it the sweet spot. It offers more size, stability and performance than the SX-E400 without immediately moving a developing rider onto the fastest model in the range.
With 14-inch wheels, front and rear suspension, three selectable speed settings, front and rear disc brakes and a removable 36V battery, the SX-E500 provides a genuine miniature dirt-bike experience rather than simply feeling like a larger electric balance bike.
In this RFN Warrior SX-E500 review, we look at its rider sizing, performance, battery life, ride quality, strengths, drawbacks and how it compares with both the SX-E400 and SX-E700.
RFN Warrior SX-E500 Review: Our Verdict
The Sweet Spot in the RFN Warrior Range
The SX-E500 is the RFN model we would consider first for a confident young rider who has moved beyond a small balance bike but is not yet ready for the additional power and stronger performance of the SX-E700.
Its 14-inch wheels give it a more stable and substantial feel than the SX-E400, while the three speed settings mean parents can introduce the performance gradually.
The main limitation is that very small or cautious riders may still find it heavier and faster than they need. For the right-sized rider, however, the SX-E500 is arguably the strongest all-round choice in the RFN Warrior Kids range.
Best Feature
The balance between manageable performance and enough size to give a growing rider room to progress.
Best Rider
A confident beginner or developing rider who already balances comfortably on two wheels.
Main Limitation
It may be too large or fast for the smallest riders who would be better suited to the SX-E400.
Overall Position
The best all-round RFN Warrior Kids model for many riders.
RFN Warrior SX-E500 Pros and Cons
What We Like
- Proper electric motocross-style design
- Strong all-round size for growing riders
- 14-inch front and rear wheels
- Three selectable speed settings
- Front and rear suspension
- Front and rear disc brakes
- Removable lithium battery
- Good balance of performance and control
- Quiet brushless electric motor
- Lanyard-style safety power cut-off
- Useful step between the SX-E400 and SX-E700
Points to Consider
- May be too large for smaller first-time riders
- Faster than many basic electric balance bikes
- Mechanical brakes rather than hydraulic brakes
- Heavier to manoeuvre than a lightweight balance bike
- Confident adult supervision is essential
- Not suitable for public-road use
- Final assembly and safety checks are required
Who Is the RFN Warrior SX-E500 For?
The RFN Warrior SX-E500 is generally designed for riders aged around 4–7 years old and approximately 100–120cm tall.
Age should always be treated as a guide rather than a guarantee of fit. Rider height, inside leg measurement, strength, confidence and previous experience are all important when deciding between the SX-E400 and SX-E500.
The SX-E500 is best suited to a child who already balances confidently on two wheels and understands basic throttle and braking control.
It can work as a first electric dirt bike for a confident rider, but a smaller or more cautious child may be better beginning on the SX-E400.
SX-E500 rider guide
- Age guide: around 4–7 years
- Height guide: approximately 100–120cm
- Maximum rider weight: approximately 50kg
- Best rider type: confident beginner to developing young rider
- Useful previous experience: balance bike, bicycle, SX-E400 or another smaller electric bike
- Best terrain: grass, dirt, fields and private off-road riding areas
- Next step: RFN Warrior SX-E700 MX
Is the SX-E500 suitable for a complete beginner?
The SX-E500 can suit a beginner, but only when the rider is physically large enough and already confident balancing on two wheels.
It weighs approximately 19kg and reaches up to around 18.5mph in its highest setting. This makes it a more substantial bike than a typical electric balance bike.
A confident rider can begin in the lowest speed mode and progress gradually. A very small, nervous or inexperienced child may find the SX-E400 easier to control.
RFN Warrior SX-E500 Key Specifications
| Specification | RFN Warrior SX-E500 |
|---|---|
| Motor | 36V 350W brushless electric motor |
| Rated output | 500W |
| Torque | Approximately 34Nm |
| Battery | 36V 5.2Ah removable lithium-ion battery |
| Energy capacity | 187Wh |
| Speed settings | Approximately 9.5mph, 13.5mph and 18.5mph |
| Maximum range | Up to approximately 11 miles in suitable conditions |
| Claimed Eco ride time | Around one hour in suitable conditions |
| Full charging time | Approximately 160 minutes |
| 80% charging time | Approximately 120 minutes |
| Brakes | 140mm front and rear disc brakes |
| Frame | Aluminium tube frame |
| Rear suspension | Rear mono shock |
| Ground clearance | Approximately 175mm |
| Wheels | 14-inch front and rear |
| Bike weight | Approximately 19kg |
| Maximum rider weight | Approximately 50kg |
Speed, range and riding time will vary according to rider weight, terrain, temperature, speed setting and riding style.
Design and Build Quality
The SX-E500 has the appearance and riding position of a miniature electric motocross bike rather than a traditional electric balance bike.
It uses motocross-style bodywork, proper footrests, front and rear suspension, 14-inch wheels and a more substantial chassis.
This gives the rider a planted and confidence-inspiring platform, particularly across grass, dirt and uneven private off-road terrain.
The aluminium frame helps keep the bike’s weight to approximately 19kg while still offering enough strength and stability for its intended rider.
Does the SX-E500 feel heavy?
The SX-E500 is heavier than a basic electric balance bike but remains relatively manageable for the rider size it is designed around.
The additional weight helps the bike feel stable once moving, although smaller children may struggle to pick it up or support it confidently at a standstill.
This is why the SX-E400 remains the better choice for riders below the SX-E500’s intended height and ability range.
Motor Performance and Riding Experience
The SX-E500 uses a smooth and quiet 36V brushless electric motor with a rated output of 500W.
The power delivery is progressive rather than abrupt, making the bike easier for younger riders to control while they develop throttle technique.
Compared with the SX-E400, it feels faster, larger and more substantial. However, it does not have the stronger acceleration or higher maximum speed of the SX-E700.
This middle-ground performance is one of the SX-E500’s biggest strengths. It remains exciting without immediately becoming excessive for a developing rider.
Three Speed Modes Reviewed
The SX-E500 has three selectable speed settings, allowing parents to restrict the bike while the rider learns and unlock more performance as confidence improves.
SX-E500 speed modes
- Lowest mode: approximately 9.5mph
- Middle mode: approximately 13.5mph
- Highest mode: approximately 18.5mph
The lowest setting is still faster than the beginner mode on the SX-E400, which reinforces why the SX-E500 is better suited to a confident rider.
The middle setting offers enough performance for regular riding, while the highest mode gives the rider additional speed once they have developed good throttle and braking control.
The three-mode system helps prevent the bike from being outgrown too quickly and allows performance to increase alongside the rider’s ability.
Battery Life Review
The RFN Warrior SX-E500 uses a removable 36V 5.2Ah lithium-ion battery with a claimed maximum range of approximately 11 miles.
RFN states that Eco mode can provide around one hour of riding in suitable conditions.
- 36V 5.2Ah removable lithium battery
- 187Wh energy capacity
- Up to approximately 11 miles of claimed range
- Around one hour in Eco mode under suitable conditions
- Approximately 160 minutes for a full charge
- Approximately 120 minutes to reach 80%
Actual ride time will depend heavily on rider weight, terrain and riding style. Soft grass, hills, mud and frequent full-throttle acceleration will reduce the available range.
The removable design makes the battery easier to charge indoors without moving the entire bike. It also allows the battery to be stored away from extreme temperatures when the bike is not being used.
Suspension and Ride Quality
The SX-E500 uses front suspension and a rear mono shock, giving it a more controlled and comfortable ride over uneven ground.
The combination of 14-inch wheels, suspension and approximately 175mm of ground clearance makes the SX-E500 noticeably more capable than a rigid electric balance bike.
It works well across grass, dirt, light woodland trails and private tracks, giving riders a genuine introduction to off-road bike control.
The suspension is intended for recreational riding rather than unrestricted jumping or competition motocross use, but it performs well for the bike’s target rider.
Braking Performance
The SX-E500 is fitted with 140mm front and rear disc brakes.
Having separate braking control at both ends is a useful progression from the rear-only setup used on the smaller SX-E400.
The brakes provide predictable stopping performance while remaining relatively straightforward to inspect and maintain.
They are cable-operated rather than hydraulic, so riders wanting the strongest and most advanced braking setup in the RFN Kids range would need to consider the SX-E700.
Before every ride, an adult should confirm that both brakes are operating correctly and that the rider can reach and comfortably use the levers.
How Does the SX-E500 Ride Off Road?
The SX-E500 is designed for private off-road riding and performs best on natural surfaces.
Its wide tyres, 14-inch wheels, suspension and higher ground clearance allow it to handle:
- Grass fields
- Dirt tracks
- Light woodland trails
- Private paddocks
- Uneven garden terrain
- Beginner motocross-style practice areas
The SX-E500 feels more stable over rough ground than the smaller SX-E400, largely because of its larger wheels and additional ground clearance.
It is still a children’s recreational bike, so the riding area should match the rider’s experience and the bike should always be used under suitable adult supervision.
RFN Warrior SX-E400 vs SX-E500
The SX-E400 and SX-E500 are closely related, but they suit different rider sizes and confidence levels.
| Feature | SX-E400 | SX-E500 |
|---|---|---|
| Best For | Smaller and younger riders | Growing and more confident riders |
| Rated Output | 400W | 500W |
| Top Speed | Approximately 15.5mph | Approximately 18.5mph |
| Wheels | 12-inch | 14-inch |
| Brakes | Rear disc brake | Front and rear disc brakes |
| Best Rider | Younger first-time rider | Confident beginner or developing rider |
Choose the SX-E400 for a smaller rider who needs the most manageable bike in the range.
Choose the SX-E500 for a rider who is physically larger, already balances confidently and would benefit from bigger wheels, front and rear brakes and additional performance.
Read our complete RFN Warrior SX-E400 vs SX-E500 comparison before deciding.
RFN Warrior SX-E500 vs SX-E700 MX
The SX-E700 is the next step above the SX-E500 and is intended for riders who need more power, longer range and stronger components.
| Feature | SX-E500 | SX-E700 MX |
|---|---|---|
| Best For | Developing riders | More confident and experienced riders |
| Peak Performance | 500W rated output | Up to 700W peak power |
| Top Speed | Approximately 18.5mph | Approximately 21.5mph |
| Battery | 36V 5.2Ah | 36V 7.5Ah |
| Brakes | Mechanical disc brakes | Hydraulic disc brakes |
The SX-E500 is the better option when manageable performance remains the priority.
The SX-E700 makes more sense once the rider has developed enough skill to use its additional power, larger battery and upgraded braking system.
Read our RFN Warrior SX-E500 vs SX-E700 MX comparison for a more detailed breakdown.
What Could Be Better?
No bike is perfect, and there are a few points worth considering before buying the SX-E500.
- It may be too large or fast for the smallest riders.
- The lowest mode starts at approximately 9.5mph, which is faster than the SX-E400’s beginner setting.
- The mechanical brakes are not as advanced as the hydraulic system on the SX-E700.
- It is heavier and more difficult to lift than a basic electric balance bike.
- Very confident riders may eventually want the additional performance of the SX-E700.
These are not major faults. They simply reinforce the importance of choosing the model that best matches the rider’s current size and ability.
Would We Recommend the SX-E500?
Yes — It Is the Best All-Round RFN for Many Riders
The SX-E500 offers one of the best combinations of size, performance and progression in the RFN Warrior Kids range.
It has enough capability to remain exciting as the rider improves, while the three speed settings prevent parents from having to unlock the bike’s full performance immediately.
For a confident child around 100–120cm tall who wants their first proper electric dirt bike, the SX-E500 is the model we would often consider first.
Shop RFN Warrior SX-E500Fast UK Delivery and Straightforward Setup
The RFN Warrior SX-E500 can be ordered online for fast UK delivery. The bike is supplied securely packaged and will require final assembly and safety checks before its first ride.
Garland Powersports operates as an online-only specialist retailer, with bikes held boxed within our UK warehouse network and prepared for dispatch.
- Fast UK delivery available
- Supplied securely packaged
- Some final assembly required
- Brakes, controls, wheels and fasteners should be checked before riding
- The battery should be charged correctly before first use
- Adult supervision and suitable protective equipment are essential
Before the first ride, an adult should make sure the handlebars, controls, brakes, wheels and all visible fasteners are correctly fitted and secure.
Is the RFN Warrior SX-E500 Worth Buying?
The RFN Warrior SX-E500 is worth buying if your child wants a genuine electric dirt-bike experience and has moved beyond the size or performance of a smaller electric balance bike.
Its biggest strengths are the 14-inch wheels, three selectable speed settings, suspension at both ends, front and rear disc brakes and removable battery.
It offers more room for progression than the SX-E400 without immediately placing the rider on the more powerful SX-E700.
The key consideration is rider confidence. The SX-E500’s lowest speed setting is still relatively quick, so it is best suited to a child who already has good balance and understands basic braking.
My Take as a British Motocross Rider
The SX-E500 is probably the RFN Warrior model I would look at first for the largest group of young riders.
It feels much more like a proper mini motocross bike than a basic balance bike, but it is not as demanding as the SX-E700.
The 14-inch wheels and front and rear brakes make it a proper step forward from the SX-E400, while the three speed settings still give parents control over how quickly the rider progresses.
For a confident child who already rides comfortably on two wheels, the SX-E500 is the sweet spot in the RFN Warrior Kids range.
RFN Warrior SX-E500 FAQs
What age is the RFN Warrior SX-E500 for?
The RFN Warrior SX-E500 is generally aimed at riders aged around 4–7 years old. Height, confidence and previous riding experience should also be considered.
What height rider is the SX-E500 for?
The SX-E500 is generally suited to riders approximately 100–120cm tall. This should be treated as a guide rather than a strict rule.
How fast does the RFN Warrior SX-E500 go?
The SX-E500 has three speed settings of approximately 9.5mph, 13.5mph and 18.5mph.
Can parents restrict the speed?
Yes. The selectable speed settings allow parents to limit the available performance and increase it as the rider becomes more confident.
How long does the SX-E500 battery last?
The bike has a claimed maximum range of approximately 11 miles and around one hour of riding in Eco mode under suitable conditions. Actual performance varies with terrain, rider weight, temperature and riding style.
Is the SX-E500 battery removable?
Yes. The SX-E500 uses a removable 36V 5.2Ah lithium-ion battery, making it easier to charge away from the bike.
How long does the battery take to charge?
A full charge takes approximately 160 minutes, while an 80% charge takes around 120 minutes.
Does the SX-E500 have suspension?
Yes. The SX-E500 has front suspension and a rear mono shock to improve comfort and control over uneven private off-road terrain.
Does the SX-E500 have front and rear brakes?
Yes. It is equipped with 140mm front and rear disc brakes.
Is the SX-E500 suitable for beginners?
It can suit a confident beginner who already balances well on two wheels. A smaller or more cautious first-time rider may be better suited to the SX-E400.
Should I buy the SX-E400 or SX-E500?
Choose the SX-E400 for a smaller rider who needs the most manageable RFN Warrior model. Choose the SX-E500 for a taller and more confident rider who wants larger wheels, front and rear brakes and additional speed.
Read our full RFN Warrior SX-E400 vs SX-E500 comparison.
Should I buy the SX-E500 or SX-E700?
Choose the SX-E500 for manageable all-round performance. Choose the SX-E700 for a confident rider who is ready for additional power, range and hydraulic brakes.
Read our full RFN Warrior SX-E500 vs SX-E700 MX comparison.
Is the SX-E500 road legal?
No. The RFN Warrior SX-E500 is intended for use on private land with the landowner’s permission. It is not designed for public-road, pavement or cycle-path use.
Where can the SX-E500 be ridden?
It is suitable for private gardens, fields, dirt tracks and light off-road riding areas where permission has been granted.
Do riders need protective equipment?
Yes. Riders should wear a correctly fitting helmet, gloves, suitable boots and protective clothing. Adult supervision is essential.
Do you offer fast UK delivery?
Yes. Garland Powersports offers fast UK delivery on RFN Warrior SX-E500 bikes when stock is available.
Explore the RFN Warrior Kids Range
If you are still deciding which model is right, our RFN Warrior Kids range explained guide compares the SX-E400, SX-E500 and SX-E700.
RFN Warrior SX-E400
The smallest and most manageable model for younger riders entering the RFN Warrior range.
Shop SX-E400RFN Warrior SX-E500
The best all-round option for growing riders who want a proper electric dirt bike.
Shop SX-E500RFN Warrior SX-E700
The highest-performance model for confident riders who want more power and stronger components.
Shop SX-E700Final Verdict: Should You Buy the RFN Warrior SX-E500?
The RFN Warrior SX-E500 is one of the strongest all-round electric dirt bikes in the RFN Warrior Kids range.
It combines a manageable 19kg chassis, 14-inch wheels, adjustable speed modes, front and rear suspension, disc brakes and a removable battery in a package designed for confident young riders.
It offers noticeably more room for progression than the SX-E400 without immediately requiring the rider to manage the additional performance of the SX-E700.
For a rider around 100–120cm tall who already balances confidently and wants a genuine miniature motocross bike, the SX-E500 is the RFN Warrior model we would often recommend first.