Sine-Wave Controlled 6500 W Off-Road Machine
HKM-516883 Electric Dirt Bike
The HKM-516883 is an electric dirt bike defined by its electronics as much as its chassis. A sine-wave controller governs a 6500 W peak brushless DC motor; a cell-level battery management system governs the 72 V 30 Ah, 2160 Wh lithium pack that feeds it. Between them they deliver a 37.2-49.7 mph (59.9-80.0 km/h) speed band across selectable ride modes and up to 69.9 mi (112.5 km) of range, with regenerative braking recovering part of the energy every time you slow down. Steel frame, adjustable long-travel suspension, knobby tires, hydraulic discs.
6500 W Peak BLDC MotorSine-Wave Controller72 V 30 Ah / 2160 WhCell-Balancing BMS37.2-49.7 mph (59.9-80.0 km/h)Up to 69.9 mi RangeRegenerative BrakingIP-Rated Electronics
Peak Power
6500 W
Brushless DC, sine-wave driven
Energy
2160 Wh
72 V x 30 Ah lithium-ion
Speed Band
37.2-49.7 mph
59.9-80.0 km/h across ride modes
Range
Up to 69.9 mi
112.5 km per full charge
Traction
Knobby
Self-cleaning off-road tread
Efficiency
Over 90%
Brushless drivetrain under load
Overview
Start with the controller, because it sets the character of everything else. Square-wave controllers switch phases abruptly; sine-wave controllers approximate a smooth waveform, and the practical results are lower audible whine, less torque ripple, and throttle resolution fine enough to creep the bike at walking pace. On the HKM-516883 that controller drives a 6500 W peak brushless DC motor whose efficiency stays above 90 percent because there is no commutator burning energy as friction and heat.
The energy source is a 72 V 30 Ah lithium-ion pack: 2160 Wh in a reinforced enclosure with passive cooling channels and thermally conductive materials to move heat away from the cells during sustained high-current discharge. Its BMS monitors individual cell voltages and temperatures continuously and performs active balancing, which prevents the weakest cell in the string from setting a ceiling on the whole pack and keeps range estimates consistent as the bike ages.
Selectable ride modes re-map the throttle rather than changing hardware. At the conservative end the bike settles around 37.2 mph (59.9 km/h) with a softened response curve; at the top it reaches 49.7 mph (80.0 km/h) with the full peak available. Range follows the same logic - up to 69.9 mi (112.5 km) is achievable when mode selection, terrain, and throttle discipline all line up, and considerably less when they do not.
Regenerative braking closes the loop. Deceleration turns the motor into a generator and returns part of the kinetic energy to the pack instead of dumping all of it as heat into the rotors. The energy recovered per stop is modest; the reduction in pad wear over a season of descents is not. It works alongside, not instead of, the hydraulic disc brakes that carry the real stopping load.
Key Features
6500 W Peak Brushless DC Motor
Brushless architecture eliminates the commutator, the single largest wear item in a brushed motor, which lifts efficiency past 90 percent and extends service life into the thousands of hours. Peak output is available from a standstill - the moment it is most useful on a loose climb or exiting a rutted corner.
72 V 30 Ah Lithium Pack, 2160 Wh
High-density cells in a reinforced housing, specified for sustained high-current discharge rather than gentle cruising. The higher 72 V system voltage draws less current for a given power level, reducing resistive losses through the harness and keeping the pack steadier under load.
Long-Travel Forks, Progressive Rear Shock
The rear shock is progressive - its resistance rises through the stroke so small bumps stay comfortable while big landings still find support before bottoming. Preload and damping adjust front and rear, letting the setup follow rider weight and terrain instead of a factory average.
Hydraulic Discs with Regenerative Layer
Large-diameter rotors and hydraulic actuation give consistent, modulated braking in wet or dry conditions. Regeneration adds a second layer of deceleration control that also returns energy to the pack, which is most noticeable on long, technical descents.
Chain Drive, No Gearbox
A single-ratio chain drive transfers power to the rear wheel. No clutch, no shifting, no power band to stay inside - the motor covers the entire usable speed range on its own, and the drivetrain parts are standard off-road items.
Self-Cleaning Knobby Tires
Deep tread blocks with generous spacing generate grip on dirt, mud, gravel, and hardpack and eject packed material as the wheel rotates. Sidewall compliance absorbs small impacts and helps resist pinch flats on sharp-edged rock.
Intelligent Sine-Wave Controller
The controller meters power with fine granularity, producing smoother acceleration and quieter running than square-wave alternatives. On technical single-track, where the difference between traction and wheelspin is a few percent of throttle, that resolution matters.
IP-Rated Sealing on Critical Electronics
Motor controller, BMS, and wiring harness are protected against dust ingress and water splashes, so a stream crossing or a rain shower does not end the ride. Dry the machine and re-lubricate the chain when you get back.
Full Specifications
Model
HKM-516883 | Electric Dirt Bike
Frame Material
High-tensile steel tubing with gusseted high-stress junctions
Motor
Brushless DC (BLDC), 6500 W peak output
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; charge rate tapers automatically near full
Battery Management
Continuous per-cell voltage and temperature monitoring, active balancing
Top Speed
37.2-49.7 mph (59.9-80.0 km/h) depending on ride mode
Range Per Charge
Up to 69.9 mi (112.5 km) from 2160 Wh
Climbing
Full peak output from zero rpm for steep gradients and loose surfaces
Controller
Sine-wave controller with low torque ripple and fine throttle resolution
Drive Type
Single-ratio chain final drive
Brakes
Hydraulic disc brakes on large rotors, front and rear, with regenerative braking
Suspension
Long-travel front forks, progressive rear shock, adjustable preload and damping
Tires
Knobby off-road tires with deep, self-cleaning tread blocks
Wheels
Spoked off-road wheels with compliant sidewall tires
Ergonomics
Test-optimised rider triangle; slim waist profile for knee grip
Instrumentation
Handlebar readout: road speed, state of charge, active ride mode
Throttle
Twist throttle mapped through the selected ride mode
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
The pack is the most expensive component on any electric dirt bike, so the engineering around it matters. 2160 Wh at 72 V nominal is stored in high-density lithium-ion cells inside a reinforced enclosure. Passive cooling channels and thermally conductive materials move heat out during rapid discharge, which keeps the cells within their intended operating window during aggressive riding in warm weather.
The management system does the rest. It watches every cell for voltage and temperature, balances them actively so charge distributes evenly, and blocks over-discharge, over-current, and thermal excursions. In ownership terms this shows up as range estimates that stay consistent over time and charging cycles that behave the same in year three as they did in month one. Under favourable conditions the pack supports up to 69.9 mi (112.5 km).
Tip: Charge in a cool, dry environment. Heat during charging is the main avoidable stress on lithium cells, and the BMS can only manage what the ambient conditions allow.
A full charge from a depleted state takes several hours with the standard charger. The charging curve is managed rather than fixed: the rate slows as the pack approaches capacity so the final percentage is added gently. Partial top-ups between sessions are completely acceptable and are easier on the cells than deep discharge cycles.
Daily Use & Care
- Match tire pressure to the surface - lower for sand and loose dirt, higher for rock and hardpack.
- Clean and lubricate the chain and check its tension after every dusty, wet, or long ride.
- Wash grit off the fork stanchions and shock shaft before it dries onto the seals.
- Inspect brake pads for thickness and keep the rotors free of oil and chain lubricant.
- Re-torque spokes, axle nuts, and footpeg fasteners after heavy landings or rough sections.
- Dry the charge port and all connectors after wet rides; store the bike under cover.
- Charge in a cool, dry place and unplug the charger when the cycle completes.
What's in the Box
- 1 x HKM-516883 electric dirt bike, largely pre-assembled
- 1 x 72 V 30 Ah (2160 Wh) lithium battery pack, installed
- 1 x Smart charger, 100-240 V input
- 1 x Ignition key set
- 1 x Basic toolkit for trailside adjustment
- 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
Why does a sine-wave controller matter?+
It changes how the motor receives power. Square-wave switching produces torque ripple and audible whine; sine-wave commutation smooths both. The rider-facing result is quieter running, gentler acceleration onset, and much finer throttle control at low speed - which is where technical trail riding is decided.
What terrain suits the HKM-516883?+
Dirt trails, gravel tracks, forest roads, sandy washes, and moderately rocky ground. Knobby tires, long-travel suspension, and instant torque cover loose surfaces and climbs. Rider skill and correct tire pressure extend that envelope considerably.
How much range will I get in practice?+
The 2160 Wh pack supports up to 69.9 mi (112.5 km) under favourable conditions. Rider weight, gradient, surface, temperature, average speed, and throttle aggression all reduce it. Lower power modes, steady throttle, and regeneration on descents are the levers you control.
How long does charging take?+
Several hours from a fully depleted pack on the standard charger. The BMS slows the rate near full capacity to limit heat and protect cell health, so the final portion takes proportionally longer than the first.
What does maintenance look like?+
No oil, filters, plugs, or fuel system. Chain lubrication and tension, tire pressure, brake pad inspection, and sensible charging habits cover almost everything. Suspension units should be serviced periodically as they would be on any off-road motorcycle.
Is this manageable for a rider new to dirt bikes?+
Yes, with the caveat that you start in a lower ride mode. Removing the clutch and gearbox removes two significant learning barriers, and the restrained modes cap speed near 37.2 mph (59.9 km/h). Increase output progressively as your skill develops.
How much energy does regeneration actually return?+
A modest amount per event, concentrated on descents and repeated braking. Its more measurable benefit is reduced brake pad and rotor wear. Treat recovered energy as a bonus rather than a way to plan a longer route.
Can it handle rain and shallow water?+
The controller, BMS, and harness carry IP-rated sealing against dust and splashes, which covers rain, mud, and shallow crossings. Do not submerge the machine, and dry it plus 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 PackSine-Wave ControllerRegen BrakingIP-Rated Sealing
Why Choose the HKM-516883
Electronics Doing the Difficult Work
A sine-wave controller and a cell-balancing BMS are not headline specifications, but they are what make 6500 W usable and what make 2160 Wh last. Good electronics turn raw numbers into a machine you can actually place where you want it.
Progressive Rear Suspension
A progressive shock is soft early in the stroke and firm late, so it stays comfortable on trail chatter while still resisting bottoming on landings. Combined with adjustable preload and damping, it covers a wide span of riding without swapping parts.
Ride Modes Instead of Compromise
The controller can present the same hardware as a restrained 37.2 mph trail bike or a 49.7 mph sportbike. That flexibility means the machine stays appropriate as your skill grows, and it can be handed to a less experienced rider without modification.
Low Noise, More Places to Ride
Operating at a fraction of the decibel level of a combustion machine changes where riding is acceptable - trails near residential areas, private land with restrictions, and early hours all become viable.
No Emissions, No Spills
Zero tailpipe output, and no petrol, oil, or coolant to leak onto the ground. For sensitive riding areas that is often a hard requirement rather than a preference.
Fewer Wear Items by Design
One moving part in the motor, no wearing parts in the controller, and a sealed hydraulic brake system. The maintenance burden is dominated by the chain and the tires, both of which are cheap and quick to service.
Controls & Indicators
Key Switch
Powers the system up and down; remove the key when parking
Ride Mode Selector
Selects the controller power map, from restrained to full output
Twist Throttle
Right-hand grip with proportional, sine-wave-shaped response
Speed Readout
Live road speed on the handlebar display, mph or km/h
State of Charge
Pack level reported directly from the battery management system
Kill Switch
Immediately cuts motor drive without powering the system down
Suspension Adjusters
Preload and damping controls on the forks and rear shock
Pre-Ride Safety Checklist
- Set tire pressure for the surface you intend to ride.
- Check chain tension, lubrication, and rear axle torque.
- Pull both brake levers and confirm they firm up early with no sponginess.
- Verify state of charge on the display and that the pack is locked in place.
- Spin both wheels, checking for buckles, loose spokes, and rotor contact.
- Inspect fork stanchions and the shock shaft for oil, and confirm 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
The throttle produces no drive.+
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 motor drive. Record any displayed fault code before contacting support.
Range has fallen off noticeably.+
Look at tire pressure and chain condition first, then temperature - cold reduces available capacity temporarily. A persistent year-round drop of more than about 30 percent after many cycles indicates the pack is near the end of its useful life.
Brake lever travel feels long and soft.+
Air in the hydraulic circuit or a leak. Stop riding and have the system inspected and bled. Braking performance is not optional on a machine that reaches 49.7 mph.
There is a knocking or skipping from the chain.+
Check tension against the manual figure and confirm the rear wheel is aligned. Inspect sprocket teeth for hooking. Chain and sprockets wear together and should be replaced as a set.
The bike feels harsh over small bumps.+
Too much compression damping or too much preload for your weight. Back the adjusters off a click at a time and re-ride the same section. Note each change so you can return to a known setting.
A fault code is displayed and drive is disabled.+
Cycle the system off for 30 seconds and back on. If the code persists, note the exact code and the circumstances, then contact support - codes identify specific faults in the controller, motor, BMS, or throttle circuit.
Certifications & Standards
The HKM-516883 is built in a facility operating under an ISO 9001 quality management system. The 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
In its highest ride mode this machine reaches 49.7 mph (80.0 km/h) with 6500 W of peak output available from a standstill. Read the manual before riding, start in the lowest mode, and step up only as 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 every time you ride.
- Start in the lowest ride mode and progress upward only as your control improves.
- 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 new brake pads with a series of progressive stops before riding hard or descending.
- Do not ride through water deep enough to reach the battery enclosure or motor.
- Charge only with the supplied charger, in a cool, dry, ventilated area, 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 - tread pattern improves grip but does not remove the risk of losing traction.
HKM-516883 · 6500 W peak brushless DC motor · sine-wave controller · 72 V 30 Ah lithium-ion (2160 Wh) with cell-balancing BMS · 37.2-49.7 mph (59.9-80.0 km/h) across ride modes · up to 69.9 mi (112.5 km) range · single-ratio chain drive · hydraulic disc brakes with regenerative braking · long-travel forks and progressive rear shock with adjustable preload and damping · knobby self-cleaning tires · high-tensile steel frame · IP-rated controller, BMS, and harness. Specifications are provided for reference; actual performance varies with rider weight, terrain, tire pressure, temperature, ride mode, and riding style. Intended for off-road and closed-course use - confirm local regulations before riding.
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