6500W Long-Range Electric Off-Road Dirt Bike
HKM-5088979 Electric Dirt Bike
The HKM-5088979 puts a 6500 W peak brushless DC motor and a 72 V 30 Ah lithium pack (2160 Wh) into a high-tensile steel off-road chassis built for trail dominance. Knobby all-terrain tires, long-travel suspension with adjustable preload and damping, and hydraulic disc brakes with regenerative braking let you climb, carve, and descend with confidence. A sine-wave controller delivers smooth, quiet, instant torque from a standstill - no clutch, no gears, just twist-and-go off-road performance.
6500 W Peak Motor72 V 30 Ah / 2160 Wh Pack49.7 mph Top SpeedUp to 69.9 mi RangeHydraulic Disc + RegenLong-Travel SuspensionChain DriveIP-Rated Sealed
Motor
6500 W
Peak brushless DC output
Battery
72 V 30 Ah
2160 Wh removable lithium
Top Speed
49.7 mph
80.0 km/h peak; 37.2 mph eco
Range
Up to 69.9 mi
112.5 km, varies with mode and terrain
Tires
Knobby
All-terrain off-road tread
Load
Rider + gear
Off-road rated chassis
Overview
The HKM-5088979 is built around a high-tensile steel frame with reinforced gussets at the high-stress junctions where a dirt bike takes its hardest hits. The triangulated chassis resists torsional flex under hard cornering and shrugs off the impact of jumps, rock strikes, and rutted singletrack, holding precise wheel alignment through seasons of aggressive use.
At the core is a 6500 W peak brushless DC motor fed by a 72 V 30 Ah lithium pack that stores 2160 Wh of energy. Brushless architecture eliminates commutator wear, pushes efficiency above 90 percent, and delivers maximum torque from zero RPM - the instant, lag-free pull that matters most when powering out of a rut, climbing a loose grade, or accelerating out of a tight corner.
A sine-wave controller governs power delivery with fine, low-speed modulation that square-wave budget controllers cannot match, while regenerative braking recaptures energy during deceleration and extends both range and pad life. The result is a calm, predictable, quiet ride that still hits 49.7 mph (80.0 km/h) at the top of its range and cruises efficiently at lower speeds.
Comfort and control are engineered for the trail. Long-travel front forks and a progressive rear shock with adjustable preload and damping smooth out chatter and absorb bigger hits; an ergonomic rider triangle reduces fatigue on long sessions; and sealed, IP-rated electronics let you ride through dust, mud, and shallow water without a second thought.
Key Features
6500 W Brushless DC Motor
A 6500 W peak brushless motor delivers instant torque across the whole rev range with zero lag and whisper-quiet operation even under full load. Brushless design removes commutator wear, extends service life, and boosts efficiency above 90 percent for more miles per charge.
72 V 30 Ah Lithium Pack (2160 Wh)
High-density cells sit in a reinforced, sealed housing built for sustained high-current discharge. The smart BMS balances cells, guards against over-discharge and thermal stress, and the pack lifts out for indoor charging between rides.
Long-Travel Suspension with Adjustable Damping
Long-travel front forks and a progressive rear shock work together to absorb trail chatter and bigger hits. Adjustable preload and damping let you tune the ride from plush comfort on fire roads to firm control on aggressive downhill sections.
Hydraulic Disc Brakes + Regenerative Braking
Large-rotor hydraulic disc brakes give progressive, communicative lever feel in all conditions. Regenerative braking feeds energy back into the pack on deceleration, extending range and reducing pad wear for a two-layer deceleration system.
Sine-Wave Controller and Ride Modes
Multiple ride modes let you dial in the balance of speed and control for any trail or skill level. The sine-wave controller maps the throttle smoothly from a crawl to full send, with no jerky steps or abrupt surges.
Knobby All-Terrain Off-Road Tires
Deep-tread knobby tires grip loose dirt, mud, gravel, and hardpack, with a self-cleaning pattern that ejects debris as the wheel turns. Generous sidewall compliance absorbs small bumps while resisting pinch flats.
LED Lighting Powered by the Main Pack
An LED lighting system runs off the main battery so there are no separate cells to keep charged. Visibility from the front and rear keeps you seen on dusk rides and on the trailhead commute home.
Trail-Ready Storage and Rear Rack Mount
A reinforced rear rack mount with tie-down points carries tools, spares, and gear for long sessions away from the truck. The removable battery and sealed electronics make the HKM-5088979 ready for all-day, all-weather trail use.
Full Specifications
Model
HKM-5088979 | Electric Dirt Bike
Frame Material
High-tensile steel, reinforced off-road geometry
Motor
6500 W peak brushless DC (BLDC) motor
System Voltage
72 V DC
Battery
72 V 30 Ah lithium-ion (2160 Wh), removable
Charger
Smart charger, 100-240 V input
Charging Time
Several hours, BMS-managed charge curve
Battery Cycle Life
Approximately 800+ charge cycles to 80 percent capacity
Top Speed
49.7 mph (80.0 km/h) peak; 37.2 mph (59.9 km/h) eco
Range Per Charge
Up to 69.9 mi (112.5 km), varies with ride mode and terrain
Climbing Grade
Steep-grade capable; instant torque from zero RPM
Peak Torque
High low-end torque, brushless output (see manual for N.m)
Drivetrain
Chain drive with sine-wave controller
Brakes
Hydraulic disc brakes plus regenerative braking, front and rear
Suspension
Long-travel front fork + progressive rear shock, adjustable preload and damping
Tires
Knobby all-terrain tread, off-road compound
Wheels
Off-road rims with knobby tires
Seat
Ergonomic off-road saddle, optimized rider triangle
Display
Digital ride dashboard: speed, battery level, ride mode
Throttle
Twist-grip throttle with multiple ride modes
Lighting
LED front and rear lighting, powered by main battery
Load Capacity
Rider plus gear, off-road rated chassis
Bike Weight
Off-road chassis (see manual for shipping weight)
Recommended Rider
Adult off-road sizing (see manual for fit guidance)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 72 V 30 Ah pack stores 2160 Wh of energy - a substantial reservoir purpose-built for sustained high-draw off-road riding. A smart battery management system balances cells and protects against over-discharge, over-current, and thermal stress so output stays stable on long climbs and deep-mud sessions.
Real-world range depends on ride mode, terrain, rider weight, and how hard you use the throttle. At moderate settings the HKM-5088979 is capable of up to 69.9 mi (112.5 km) per charge; aggressive full-power riding on technical terrain reduces that figure. Regenerative braking on descents recaptures a little energy and extends the run.
Tip: Store the pack between 30 and 70 percent charge if the bike will sit unused for more than a month, and top it up every 4-6 weeks. Charging indoors at room temperature extends usable pack life compared with charging in an unheated garage.
The pack unlocks and lifts out in seconds so you can charge it at a desk while the bike stays locked outside. Two keys are included. The charge port is accessible without removing the pack, so charging in place works equally well.
Daily Use & Care
- Set tire pressure for the surface: lower pressure for loose dirt and sand, higher for hardpack and pavement transitions.
- Lubricate and tension the chain every few rides; chain drive transmits all that 6500 W torque to the rear wheel.
- Rinse mud, dust, and grit off the frame, rims, and drivetrain after wet or dusty rides to protect fasteners and bearings.
- Inspect brake pad thickness monthly. Hydraulic pads wear silently; replace when friction material is under 1 mm.
- Check axle nuts and stem bolts are torqued before the first ride of each week; high torque works fasteners loose faster.
- Charge indoors at room temperature and unplug once the indicator turns green rather than leaving it connected for days.
- Keep the charge port and connector covers closed when the bike is parked outside so moisture stays out of the electronics.
What's in the Box
- 1 x HKM-5088979 electric dirt bike, partially pre-assembled
- 1 x 72 V 30 Ah removable lithium battery pack (2160 Wh)
- 1 x Smart charger with 100-240 V input
- 2 x Battery keys
- 1 x Toolkit with hex wrenches and paddle spanner
- 1 x Pair of off-road foot pegs
- 1 x Owner manual and quick-start guide
- 1 x Rear rack mount hardware kit
Frequently Asked Questions
What kind of terrain is the HKM-5088979 built for?+
It is purpose-built for off-road use: dirt trails, gravel paths, forest roads, sandy washes, and moderately rocky terrain. The knobby tires, long-travel suspension, and high-torque motor handle loose surfaces and climbs well. As with any dirt bike, skill and correct tire pressure expand the terrain it can confidently manage.
How does the 6500W motor compare to a gas dirt bike?+
Electric motors deliver peak torque from a standstill, so the HKM-5088979 accelerates hard in the 0-30 mph band that matters on technical trails without clutch or gear management. With no engine vibrations and near-silent running, it also opens up noise-sensitive riding areas that combustion bikes cannot use.
What is the real-world range I should plan for?+
Plan for up to 69.9 mi (112.5 km) at moderate settings; full-power riding on demanding terrain reduces that. Rider weight, terrain steepness, surface softness, temperature, and throttle aggression all move the number. Use lower power modes and steady throttle to stretch range, and let regen recover energy on descents.
How long does the battery take to charge?+
A full charge from depleted typically takes several hours on the supplied smart charger; the BMS tapers the rate near full to protect cell health. Topping up between rides is straightforward - plug in after each session and it is ready when you are.
What maintenance does an electric dirt bike need?+
Far less than a gas bike: no oil, air filter, spark plug, or carburetor service. Keep the chain lubricated and tensioned, monitor tire pressure, inspect brake pads, and keep the pack charged. The BMS protects the battery, so no owner balancing is required.
Is a license or registration required?+
Rules vary by state and locality. A 6500 W motor with a 49.7 mph top speed places this vehicle well outside the common three-class e-bike framework in most US jurisdictions, likely in the motorcycle or off-highway category. Check your state DMV and local ordinances before riding on public roads.
Can I ride the HKM-5088979 in the rain or through water?+
Electronics are sealed and IP-rated against dust and water splashes, so rain, mud, and shallow puddles are fine. Do not submerge the motor or battery compartment in deep water, and dry the bike after heavy exposure to preserve component life.
Is the battery removable for indoor charging?+
Yes. It unlocks with the supplied key and lifts out of the chassis. You can also charge it in place through the frame-side charge port.
Service & Policies
Free Shipping on All Orders
Every order ships free. Handling Time: 0-1 business days (Monday to Friday). Transit Time: 2-5 business days (Monday to Friday). A tracking number is emailed as soon as the parcel leaves our warehouse.
180 Days Purchase Protection
Your purchase is protected for 180 days from the delivery date against manufacturing defects and damage in transit. If something arrives wrong, we make it right.
30 Days Money-Back Guarantee
Not completely satisfied? Request a return within 30 days of delivery for a full refund. We keep the process simple and hassle-free.
24 Months Warranty Service
The product is covered by a 24-month warranty from the delivery date against manufacturing defects. Coverage includes parts and labor; normal-wear items are excluded.
CERoHSUN38.3 Battery2160 Wh PackHydraulic + RegenLong-Travel SuspensionIP-Rated Sealed
Why Choose the HKM-5088979
Trail-Ready by Design
Every component is selected for off-road performance: reinforced high-tensile steel frame, long-travel suspension, knobby tires, and a sealed powertrain. This is a purpose-built dirt bike, not a commuter with knobby tires bolted on.
Long-Travel Suspension for Real Terrain
Front forks and a progressive rear shock absorb trail chatter and big hits, with adjustable preload and damping so you can tune the bike to your weight, style, and the trail in front of you.
Ride Modes, Your Pace
Multiple ride modes let you start restrained and build confidence, then unlock full 6500 W output as the trail opens up. No clutch, no gear shifts - just twist the throttle and go.
Whisper-Quiet Brushless Power
The brushless drivetrain is dramatically quieter than a gas engine, so you hear the trail and disturb wildlife and neighbors far less. That quiet also unlocks noise-sensitive riding areas.
Zero-Emission Trail Riding
No tailpipe emissions, no fuel spills, no oil to change. Ride responsible and preserve the places you ride for the next rider.
Sealed for Weather and Wash-Down
IP-rated electronics, a sealed BMS, and covered connectors shrug off dust, mud, and splashes. Rinse the bike after a wet ride and get back out there.
Controls & Indicators
Power Button
Located on the battery pack; hold to switch the system on and off
Mode Buttons
Buttons on the display cycle through multiple ride modes and power limits
Twist Throttle
Right-hand grip; proportional response, immediate torque from zero RPM
Speedometer
Live speed readout in mph, switchable to km/h in the settings menu
Battery Gauge
Charge-level indicator plus percentage on the digital dashboard
Light Switch
Toggle the LED front and rear lighting from the handlebar controls
Suspension Adjust
Knobs for preload and damping on the forks and rear shock
Pre-Ride Safety Checklist
- Set tire pressure for the terrain: lower for loose dirt and sand, higher for hardpack.
- Squeeze both brake levers; they should firm up well before the grip with no sponginess.
- Confirm the battery is seated and locked, and that the dashboard shows the expected charge.
- Spin both wheels and check rims run true and nothing rubs the brakes or frame.
- Verify axle nuts and stem bolts are tight, and the headset has no play with the front brake applied.
- Test the throttle at walking pace in a clear area before riding technical sections.
- Switch on the lighting if you will be riding near dusk, and wear a moto-rated helmet for these speeds.
- Check chain tension and lubrication before a long ride; chain drive carries all the motor torque.
Quick Troubleshooting
The motor does not engage when I twist the throttle.+
Confirm the dashboard is on and shows charge, the battery is locked into place, and both brake levers are fully released - brake cut-off sensors disable the motor while a lever is pulled. If an error code appears, note it and contact support.
Range dropped noticeably compared with when it was new.+
First check tire pressure and chain tension; a soft tire or tight chain is the most common cause. Cold weather temporarily reduces capacity. If range is down more than 30 percent year-round after many cycles, the pack may be nearing end of service life.
The brakes feel spongy at the lever.+
Sponginess in a hydraulic system usually means air in the line or a fluid leak. Stop riding and have the system bled and inspected. Do not ride a 49.7 mph bike on compromised brakes.
The chain skips or slaps under hard acceleration.+
Check chain tension and lubrication first; a loose or dry chain skips under 6500 W of torque. Adjust tension at the rear axle and lube. If it persists, inspect the sprockets for wear.
The suspension feels harsh or bottoms out.+
Use the preload and damping knobs to match your weight and the trail. If it still bottoms out on normal hits, have the rear shock or fork serviced by a shop familiar with off-road suspension.
The display shows an error code and the bike will not move.+
Power the system off, wait 30 seconds, and switch it back on. If the code returns, note the exact code and conditions, then contact support - error codes map to specific faults in the controller, motor, or throttle circuits.
Certifications & Standards
The HKM-5088979 is produced in a facility operating under an ISO 9001 quality management system. The battery cells and the assembled pack carry the test documentation normally required for lithium-ion transport and sale.
- CE - European Conformity marking covering the electrical assembly.
- RoHS - Restriction of Hazardous Substances compliance for the electronics.
- UN38.3 - Battery transport safety testing, required for lithium-ion shipping by air, sea, and road.
- MSDS - Material Safety Data Sheet available for the battery pack on request.
- ISO 9001 - Quality management system certification held by the manufacturing facility.
Important Safety Notes
This is a high-output electric dirt bike capable of 49.7 mph. Read the manual fully before the first ride and practice throttle control in an open, traffic-free area until the response feels predictable. Ride only on private land or authorized off-road areas unless local law permits public use.
- Wear a moto-rated or downhill helmet and protective gear on every ride. At 49.7 mph a bicycle helmet is not enough.
- Do not exceed the off-road rated load, which includes the rider and any gear or passenger on authorized two-up use.
- Check local law before riding on public roads or paths. A 6500 W motor with 49.7 mph top speed is outside standard e-bike classifications in most areas.
- Bed in the brake pads with progressive stops during the first few rides before riding at full speed.
- Do not ride through water deep enough to reach the motor or the battery compartment.
- Charge only with the supplied charger, indoors, at room temperature, and on a non-flammable surface. Do not leave a charging battery unattended overnight.
- Do not attempt to open, puncture, or modify the battery pack. Damaged lithium packs can vent and ignite.
- Reduce speed substantially on loose, wet, or downhill terrain; knobby tires add grip but do not eliminate the risk of losing traction.
HKM-5088979 · 6500 W peak brushless DC motor · 72 V 30 Ah lithium (2160 Wh) · 49.7 mph top speed · up to 69.9 mi range · knobby all-terrain tires · long-travel suspension · hydraulic disc brakes with regen · chain drive · high-tensile steel off-road frame · IP-rated sealed electronics. Specifications are provided for reference; actual performance varies with rider weight, terrain, tire pressure, temperature, and riding mode. Range figures are estimates under moderate settings. This page describes the product only and is not legal advice regarding vehicle classification - confirm local regulations before riding on public roads.
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With over 3,000 authorized service centers across the United States, we ensure comprehensive after-sales support for your vehicle, giving you complete peace of mind.
We understand that maintenance needs may arise. When you purchase from us, you gain access to our unparalleled service ecosystem designed for maximum convenience and reliability.
1. DIY Repair & Parts Replacement:
For minor repairs or part replacements that can be handled personally, we provide cost-price genuine parts during the warranty period. Each order is accompanied by clear, step-by-step video tutorials to guide you through the self-repair process seamlessly.
2. Professional Servicing:
For issues requiring expert attention, simply contact our support team. We will locate the nearest authorized service center based on your order and location details. You only need to bring your vehicle to the designated center. Once servicing is complete, we will notify you for pickup. All repairs are free during the warranty period; afterward, only cost-based fees apply.
Rest assured—wherever you are, our extensive partner network is ready to keep your ride running smoothly.
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For added long-term security, our Lifetime Limited Powertrain Warranty and Lifetime Wrap Program provide continued mechanical breakdown coverage for as long as you own your vehicle—with no term or mileage restrictions.
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We are confident that our products are of great quality and even better value. However, if upon receiving and inspecting your item you decide that you want to return it, you will have 30 days as of the date of shipment arrival to return it for a refund minus the shipping cost. No restocking charges. Any additional fees associated with a purchase transaction will be deducted from the amount of the refund.
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If you purchase products from our website, you have 24 months to request repairs or replacement if any products turns out to be faulty or are not as advertised. During the warranty period if any product is found to have a manufacturer defect, we will repair or replace the defective part(s). If a product cannot be repaired or replaced within a reasonable time, you can request a refund or price reduction. We are confident that our products are of great quality and even better value. However, if upon receiving and inspecting your item you decide that you want to return it, you will have 30 days as of the date of shipment arrival to return it for a refund minus the shipping cost.
