RFN Warrior SX-E400 Electric Bike

BIKE DIMENSIONS

Compact and easy for younger riders to manage, the RFN Warrior SX-E400 measures approximately 97cm long, 57cm wide and 65cm high, with a 46cm seat height and 68.5cm wheelbase. Designed primarily for children aged around 3 to 6 years, its low seat height and manageable proportions make it a great choice for young riders taking their first steps into electric off-road riding. As every child develops differently, we recommend checking your rider's height, confidence and ability alongside the bike's dimensions to ensure the best possible fit.

• SEAT HEIGHT - 46cm
• SEAT TO FOOTPEGS - 30cm
• HANDLEBAR HEIGHT - 63cm

SPEED SETTINGS

The RFN Kids Warrior SX-E400 includes three adjustable speed settings;

• Low - 5 mph
• Mid - 8 mph
• High - 15.5 mph

These speed settings allow parents full control over how fast their child rides. Starting at a lower speed and gradually increasing it helps to build confidence over time and ensures a safe, manageable riding experience, whilst helping the rider develop new skills, such as coordination and throttle control at a pace that feels right for them.

THROTTLE & SAFETY FEATURES

The RFN SX-E400 is fitted with a smooth, easy- to-use throttle that’s ideal for young riders who are still learning. Power comes in gently, not all at once, helping to avoid sudden bursts of speed and giving parents confidence that their child is riding safely as they build their skills. There’s also a simple battery indicator built into the the throttle, so it’s easy to check the charge before heading out, during rides or when you get back. 

Safety is a key part of the RFN Warrior SX-E400, with a lanyard-style safety cut-off switch designed to stop the bike quickly if the rider becomes separated from it. This provides added reassurance for parents and helps young riders build confidence in a more controlled environment. The bike also features a secure power-lock cover and enclosed chainguard, helping to reduce access to moving components and improve overall rider safety.

BRAKE SYSTEM

Control is made easy on the RFN Warrior SX-E400, with cable-operated brakes and light-action brake levers designed to be comfortable for smaller hands. The levers are easy to pull, helping younger riders slow down smoothly and confidently without needing excessive force. This simple, predictable braking setup makes it easier for beginners to manage their speed while giving parents added reassurance as riding skills develop.

36V 5.2Ah BATTERY

Longer adventures are powered by a removable 36V 5.2Ah lithium battery, offering convenient charging and plenty of riding time for younger riders. A full charge takes approximately 2.5 hours, while the three selectable riding modes allow battery use and performance to be balanced as confidence develops. Eco Mode (5 mph) provides the longest ride time, with up to approximately 11 miles or 2 hours of use, while Standard Mode (around 8 mph) and Sport Mode (15.5 mph) use more power as speed increases. Actual riding time will vary depending on rider weight, terrain, riding style and how frequently full throttle is used.

FULL SUSPENSION

The RFN Warrior SX-E400 is equipped with front and rear suspension to help smooth out bumps and uneven terrain, giving younger riders a more comfortable and controlled off-road experience. By absorbing impacts from rough ground, the suspension helps keep the bike more stable and reduces the amount of vibration transferred through the handlebars and seat. This added comfort and control can help beginner riders feel more confident when riding across grass, tracks and light off-road terrain.

ALL TERRAIN TYRES

The RFN Warrior SX-E400 features 12-inch wheels with off-road tyres, giving younger riders a stable and confidence-inspiring setup across a variety of surfaces. The chunky tread helps provide extra grip on grass, dirt, mud and loose ground, while the compact wheel size keeps the bike easy to handle and manoeuvre. This combination of traction and control makes the SX-E400 well suited to beginner off-road riding, helping riders feel more secure as they build their skills.

MOTOR AND POWER

The RFN Warrior SX-E400 is powered by a 250W brushless electric motor with up to 400W peak output, providing smooth and responsive performance for younger riders. Power is delivered through a chain-drive system, giving the bike a more traditional off-road feel while providing dependable drive to the rear wheel. Combined with its sine-wave controller, the motor delivers progressive, predictable acceleration, making it easier for beginners to control the throttle and build confidence as their riding ability develops.