Climb-Focused 6500 W Electric Dirt Bike
HKM-615187 Electric Dirt Bike
Gradients are where an electric dirt bike proves itself, and the HKM-615187 is set up for them. The 6500 W peak brushless DC motor produces its maximum twisting force from zero rpm, so a climb that turns to loose gravel halfway up does not require a downshift or a run-up. Behind it sits a 72 V 30 Ah lithium pack holding 2160 Wh, good for up to 69.9 mi (112.5 km), and in front of it a sine-wave controller that keeps the delivery smooth. Ride modes span 37.2-49.7 mph (59.9-80.0 km/h); adjustable long-travel suspension and hydraulic disc brakes handle the descent.
6500 W Peak from Zero RPM72 V 30 Ah / 2160 Wh PackUp to 69.9 mi (112.5 km)37.2-49.7 mph Ride ModesChain Final DriveHydraulic Disc + RegenLong-Travel Adjustable SuspensionGusseted Steel Frame
Peak Power
6500 W
Brushless DC, torque from zero rpm
Battery
72 V 30 Ah
2160 Wh lithium-ion
Top Speed
49.7 mph
80.0 km/h in the highest ride mode
Range
Up to 69.9 mi
112.5 km per charge
Drive
Chain
Single ratio, no clutch or gearbox
Efficiency
Over 90%
Brushless motor under load
Overview
Torque is what climbs hills, and an electric motor makes all of it at zero rpm. That single characteristic is why the HKM-615187 approaches gradients differently from a combustion dirt bike. There is no need to carry momentum into the base of a climb, no gear to select at the wrong moment, and no clutch to slip while the engine finds its power band. You point the front wheel at the line you want and feed in throttle - the 6500 W peak is available immediately and continuously.
Getting that power to the ground is the job of the sine-wave controller, the chain drive, and the tires, in that order. The controller shapes torque smoothly instead of switching it, so the throttle can be opened in small increments on a surface that will not take a sudden load. The single-ratio chain keeps the drivetrain simple and easy to re-gear. The knobby tires clear themselves as they turn, which matters more on a wet climb than tread depth alone.
The energy behind it is a 72 V 30 Ah lithium-ion pack storing 2160 Wh in a reinforced enclosure. Climbing draws hard on a battery, so the pack is specified for sustained high-current discharge and its enclosure carries passive cooling channels and thermally conductive materials to move heat away from the cells. The management system balances cells actively and watches temperature continuously, protecting the pack during exactly the kind of riding that stresses it most.
What goes up has to come down. Hydraulic disc brakes on large rotors handle the descent with progressive lever feel that does not fade as the rotors heat, and regenerative braking works alongside them, returning part of the energy to the pack and reducing how much heat the pads have to absorb. Long-travel forks and a progressive rear shock keep both wheels tracking the ground on the way back down.
Key Features
6500 W Peak Brushless DC Motor
Peak output is on tap from a standstill, which is the defining advantage on steep, loose ground. Brushless construction removes the commutator, the main wear item in a brushed motor, keeping efficiency above 90 percent and extending service life into the thousands of riding hours.
72 V 30 Ah Lithium Pack (2160 Wh)
High-density cells in a reinforced housing built for sustained high-current draw - the load profile of repeated climbing. 2160 Wh supports up to 69.9 mi (112.5 km), and the 72 V architecture keeps current lower for a given output so voltage sag stays modest under load.
Long-Travel Forks and Progressive Rear Shock
Adjustable preload and damping at both ends let you firm the bike up for weight transfer on steep terrain or soften it for comfort on fire roads. The progressive rear shock resists bottoming on landings without making small bumps harsh.
Hydraulic Disc Brakes with Regeneration
Large-diameter rotors and sealed hydraulic lines deliver consistent, modulated braking on long descents where cable systems and small rotors struggle. Regeneration adds a second deceleration layer and returns energy to the pack instead of wasting it as heat.
Single-Ratio Chain Drive
A conventional chain and sprocket set transmits power to the rear wheel. Gearing is straightforward to change if your terrain favours acceleration over top speed, and every part in the drive path is a standard off-road item.
Knobby Tires That Shed Mud
Deep tread blocks with wide spacing grip loose dirt, mud, gravel, and hardpack, and eject packed material as the wheel rotates so the edges keep working. Compliant sidewalls absorb small impacts and resist pinch flats.
Sine-Wave Controller
Smooth commutation means low torque ripple, reduced drivetrain noise, and fine throttle resolution at low speed. On a technical climb, being able to add five percent of throttle rather than twenty is the difference between traction and wheelspin.
IP-Rated Weather Sealing
The controller, BMS, and wiring harness are sealed against dust and water splashes, so wet grass, muddy ruts, and shallow crossings are ordinary riding conditions rather than hazards to the electronics.
Full Specifications
Model
HKM-615187 | Electric Dirt Bike
Frame Material
High-tensile steel tubing with gussets at high-stress junctions
Motor
6500 W peak brushless DC (BLDC)
System Voltage
72 V DC
Battery
72 V 30 Ah lithium-ion, 2160 Wh
Charger
Smart charger, 100-240 V input
Charging Time
Several hours from empty; the rate tapers as the pack fills
Battery Management
Per-cell voltage and temperature monitoring with active balancing
Top Speed
37.2-49.7 mph (59.9-80.0 km/h) by selected ride mode
Range Per Charge
Up to 69.9 mi (112.5 km) under favourable conditions
Climbing
Full 6500 W peak available from zero rpm for steep and loose ascents
Controller
Sine-wave controller with low torque ripple and fine throttle resolution
Drive Type
Chain final drive, single ratio
Brakes
Hydraulic disc brakes front and rear on large rotors, plus regenerative braking
Suspension
Long-travel front forks and progressive rear shock; preload and damping adjustable
Tires
Knobby off-road tires with deep, self-cleaning tread
Wheels
Spoked off-road wheels with compliant sidewall tires
Ergonomics
Rider triangle set for standing control on climbs; slim waist for knee grip
Instrumentation
Handlebar readout for speed, state of charge, and ride mode
Throttle
Twist throttle with multiple selectable ride modes
Weather Protection
IP-rated sealing on controller, BMS, and wiring harness
Intended Use
Single-rider off-road and closed-course riding
Motor Efficiency
Over 90 percent; no commutator losses
Rider Fit
Adult off-road ergonomics with an upright standing position
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
Climbing is the most energy-hungry thing you can ask of an electric bike, so pack capacity matters more here than on flat trails. 2160 Wh at 72 V nominal gives the HKM-615187 a reserve that supports up to 69.9 mi (112.5 km) in favourable conditions, and the high system voltage keeps current - and therefore heat in the harness and controller - lower than the same power would demand at 48 V or 60 V.
Expect steep terrain to consume energy quickly. Soft sand and long climbs are the two biggest drains, followed by cold ambient temperature, rider weight, and sustained running at the top of the speed range. The countermeasures are simple: choose a lower ride mode on approach sections, keep throttle inputs smooth rather than abrupt, and let regenerative braking work on the way back down.
Tip: After a long climbing session, let the pack cool before plugging in rather than charging it hot. The BMS will manage the cycle either way, but starting from a lower cell temperature is easier on the chemistry.
A full charge from a depleted pack takes several hours on the standard charger, with the rate deliberately reduced near the top of the cycle. Partial top-ups between sessions are entirely acceptable and are gentler on the cells than repeatedly discharging the pack to empty and filling it again.
Daily Use & Care
- Set tire pressure for the climb surface - lower for loose dirt and sand, higher for rocky ground.
- Check chain tension and lubrication before every ride; climbing loads the chain harder than flat riding.
- Wash mud and grit off the fork stanchions and shock shaft before it dries onto the seals.
- Inspect brake pads regularly - descents wear them faster than any other kind of riding.
- Re-check spoke tension, axle nuts, and footpeg bolts after long or rough days.
- Dry the charge port and connectors after wet rides and keep the bike under cover.
- Charge in a cool, dry place and unplug once the charger signals completion.
What's in the Box
- 1 x HKM-615187 electric dirt bike, largely pre-assembled
- 1 x 72 V 30 Ah lithium battery pack (2160 Wh), installed
- 1 x Smart charger with 100-240 V input
- 1 x Ignition key set
- 1 x Trailside toolkit
- 1 x Front wheel and handlebar hardware pack
- 1 x Chain lubricant sample
- 1 x User manual and pre-ride inspection guide
Frequently Asked Questions
How well does it climb?+
The full 6500 W peak is available from a standstill, so there is no need to build revs or carry speed into the bottom of a climb. Combined with knobby self-cleaning tires and fine throttle control from the sine-wave controller, steep and loose ascents are well within its design intent. Traction and rider technique become the limits rather than power.
What terrain is it suited to?+
Dirt trails, gravel, forest roads, sandy washes, and moderately rocky ground. Long-travel suspension and knobby tires handle loose surfaces; correct tire pressure and rider skill widen that envelope considerably.
How much range will climbing cost me?+
Significantly more than flat riding. The 2160 Wh pack supports up to 69.9 mi (112.5 km) in favourable conditions, and sustained climbing can reduce that substantially. Ride a known route and note the charge used before planning a long day in hilly terrain.
How long does a full charge take?+
Several hours from empty with the standard charger. The BMS slows the rate near full capacity to limit heat and protect the cells, so the last portion goes in more slowly than the first.
What maintenance should I expect?+
Chain lubrication and tension are the main recurring jobs, followed by tire pressure, brake pad inspection, and sensible charging. There is no oil, filter, plug, or fuel system work. Suspension units should be serviced periodically as on any off-road motorcycle.
Can a newer rider manage 6500 W?+
In a lower ride mode, yes. The restrained maps cap speed near 37.2 mph (59.9 km/h) and soften throttle response, and the absence of a clutch and gearbox removes two of the harder skills to learn. Move up through the modes as control becomes instinctive.
Does regeneration help on descents?+
It does two useful things: returns some energy to the pack and reduces how much heat the brake pads have to absorb. On a long descent that second benefit is the more noticeable of the two.
Is wet-weather riding a problem?+
The controller, BMS, and harness carry IP-rated sealing against dust and splashes, so rain, mud, and shallow crossings are within normal use. Do not submerge the bike, and dry it and re-lubricate the chain afterwards.
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 PackChain DriveRegen BrakingIP-Rated Sealing
Why Choose the HKM-615187
Maximum Torque at Zero RPM
The defining advantage of an electric drivetrain off-road. No run-up, no downshift, no clutch slip - the drive is simply there the moment you ask for it, which is exactly what a steep loose climb demands.
Suspension Tuned for the Terrain You Ride
Preload and damping adjust at both ends, so the bike can be firmed up for weight transfer on gradients or softened for comfort on smoother ground. The progressive rear shock resists bottoming without making small chatter harsh.
Throttle Resolution Where It Matters
Sine-wave control means the first quarter of throttle travel is useful. On a marginal-traction climb you can add power in small increments rather than in steps, which is often the difference between reaching the top and spinning out.
A Quiet Machine Opens More Ground
Running at a fraction of the noise of a combustion bike makes trails near houses, land with noise restrictions, and early starts practical. It also lets you hear the surface and other riders around you.
No Emissions, No Fluids to Spill
Zero tailpipe output and nothing to leak onto the ground - no petrol, no oil, no coolant. In areas with air-quality or contamination rules, that is often a requirement rather than a nicety.
Simple Drivetrain, Fewer Failures
One moving part in the motor, no wearing parts in the controller, sealed hydraulic brakes, and a chain. On a machine that gets ridden hard on rough ground, having less to go wrong is a practical advantage rather than a marketing point.
Controls & Indicators
Key Switch
Main system on and off; remove the key when the bike is parked
Ride Mode Selector
Chooses the controller power map, restrained through to full output
Twist Throttle
Right-hand grip, proportional and sine-wave shaped
Speed Readout
Road speed on the handlebar display, mph or km/h
State of Charge
Battery level reported by the management system
Kill Switch
Cuts motor drive immediately without powering down
Suspension Adjusters
Preload and damping settings at the forks and rear shock
Pre-Ride Safety Checklist
- Set tire pressure for the terrain, favouring lower pressure where traction on climbs matters most.
- Check chain tension and lubrication, and confirm the rear axle nuts are torqued.
- Squeeze both brake levers; they should firm up early with no sponginess.
- Confirm state of charge on the display and that the pack is locked in its mount.
- Spin both wheels, checking for buckles, loose spokes, and rotor clearance.
- Inspect the forks and shock for oil weeping and verify your adjuster settings.
- Test throttle response and the kill switch at walking pace in a clear area.
- Wear a full-face helmet, goggles, gloves, boots, and body protection.
Quick Troubleshooting
No drive when the throttle is opened.+
Check the key switch and kill switch, confirm the display shows charge, and make sure the battery connector is fully seated. Pulled brake levers cut drive. Note any fault code before contacting support.
The bike loses power part-way up long climbs.+
Sustained full-output climbing generates heat in the motor and pack, and the controller may reduce output to protect them. Give it a short rest, consider a lower ride mode for the approach, and check that the cooling paths around the battery enclosure are not packed with mud.
The brakes feel spongy after a long descent.+
Sponginess points to air in the hydraulic line or contaminated fluid. Stop riding and have the system inspected and bled. Do not continue on a machine capable of 49.7 mph with compromised brakes.
The chain skips under load on a climb.+
Almost always tension or wear. Set tension to the manual figure, check rear wheel alignment, and inspect the sprocket teeth for hooking. Replace the chain and sprockets together when either is worn.
The front wheel lifts too easily on steep ground.+
Move your weight forward, use a lower ride mode for the approach, and add preload at the rear so the bike sits less far into its travel under power. Smooth throttle inputs matter more than any setting change.
A fault code is shown and the bike will not move.+
Power off for 30 seconds, then back on. If the code returns, note it exactly along with the conditions, and contact support - each code maps to a specific circuit in the controller, motor, BMS, or throttle.
Certifications & Standards
The HKM-615187 is produced in a facility operating under an ISO 9001 quality management system. The battery cells and the completed pack carry the 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 for lithium-ion shipping by air, sea, and road.
- MSDS - Material Safety Data Sheet for the battery pack, available on request.
- ISO 9001 - Quality management system certification held by the manufacturing facility.
Important Safety Notes
With 6500 W of peak output and a 49.7 mph (80.0 km/h) top speed in its highest ride mode, this machine demands respect on steep terrain in particular. Read the manual before riding, start in the lowest mode, and build up as your throttle and brake control become predictable. Off-road riding carries inherent risk.
- Wear a full-face off-road helmet, goggles, gloves, boots, and body protection on every ride.
- Practise climbs and descents in the lowest ride mode before selecting a higher output map.
- Check local regulations. A 6500 W machine reaching 49.7 mph is generally not street-legal and is intended for off-road and closed-course use.
- Bed in the brake pads with progressive stops before tackling long or steep descents.
- Do not ride through water deep enough to reach the motor or the battery enclosure.
- Charge only with the supplied charger, in a cool, dry, ventilated space, on a non-flammable surface.
- Do not open, puncture, or modify the battery pack; damaged lithium cells can vent and ignite.
- Reduce speed on wet roots, loose gravel, and steep descents - knobby tread improves grip but cannot prevent a slide.
HKM-615187 · 6500 W peak brushless DC motor with torque from zero rpm · sine-wave controller · 72 V 30 Ah lithium-ion (2160 Wh) · 37.2-49.7 mph (59.9-80.0 km/h) by ride mode · up to 69.9 mi (112.5 km) range · single-ratio chain drive · hydraulic disc brakes with regenerative braking · adjustable long-travel forks and progressive rear shock · knobby self-cleaning tires · gusseted high-tensile steel frame · IP-rated controller, BMS, and harness. Specifications are provided for reference; actual performance varies with rider weight, terrain, gradient, tire pressure, temperature, ride mode, and riding style. Intended for off-road and closed-course use - confirm local regulations before riding.
Nationwide Service Network & Support
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.
Lifetime Limited Powertrain Warranty & Wrap Program
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.
Every product on Hekomart.com is expertly curated from thousands, quality tested, and lifestyle approved. Elevate your everyday.
Express Delivery Priority - Where Speed Meets Satisfaction
At Hekomart.com, we understand the anticipation that comes with every online order. While most platforms rely on standard economy shipping, we prioritize your excitement by strategically selecting premium express carriers to accelerate deliveries. Our intelligent logistics system analyzes real-time data to optimize routes, partnering with globally-recognized couriers like DHL, FedEx, and UPS to ensure 30% faster doorstep arrivals* than industry averages.
Every package receives 24/7 tracking visibility and proactive delivery updates, transforming waiting time into confidence. For time-sensitive purchases, our "Expedited Service Guarantee" offers optional priority handling at no extra cost, because your satisfaction isn't just a goal – it's the core of our delivery DNA.
*Based on internal 2025 data comparing standard shipping durations across major platforms. Delivery times vary by destination and customs procedures.
Credit Card 180 Days Purchase Protection
The 180 Days Purchase Protection protects the buyer if an item purchased has not been shipped or if a shipped item is significantly not as described by the seller. The 180 Days Purchase Protection covers all purchases and payments made through our website. We accept Visa, Master Card, American Express, and Discover Card. If you don't receive the item that you ordered, or it shows up significantly different from its description, you may qualify for Purchase Protection, and we'll reimburse you for the full purchase price plus any original shipping costs, subject to terms and limitations. If you are charged for a transaction that you didn't make, let us know within 60 days, and we've got you covered.
30 Days Money-Back Guarantee
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.
24-Month Extended Warranty Service
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.
