Mid-Drive Electric Dirt Bike
HKM-689619 Electric Dirt Bike
The HKM-689619 puts a 6500 W peak mid-drive motor through a single-speed gear-set into a lightweight aluminum dirt-bike chassis. With 233 N.m of torque on tap from zero rpm, it pulls hard off the line and climbs loose technical grades that would stall a pedal bike. A 60 V 40 Ah lithium pack (2400 Wh) sits low in the frame for a long 74.6 mi range, while Fastace full suspension, hydraulic disc brakes at both wheels, and 17 in CST off-road tires make it equally at home on a fire road, a hardpack trail, or a short urban hop.
6500 W Peak Mid-Drive Motor60 V 40 Ah / 2400 Wh Pack31+ mph Top Speed74.6 mi Max RangeFastace Full SuspensionHydraulic Disc Brakes17 in CST Off-Road TiresAluminum Alloy Frame
Motor
6500 W
peak mid-drive, single-speed
Battery
60 V 40 Ah
2400 Wh removable lithium
Top Speed
31+ mph
50+ km/h off-road
Range
74.6 mi
120 km per charge
Wheels & Tires
17 in / CST
70/100-19 front, 80/100-19 rear
Bike Weight
~105 lb
lightweight aluminum chassis
Overview
The HKM-689619 is built around an aluminum alloy dirt-bike frame tuned for both seated comfort and standing control on technical terrain. The geometry keeps the rider centered over the 17 in wheels, with a low battery position that drops the center of gravity and sharpens turn-in when the trail tightens. The result is a chassis that feels composed on fire roads yet agile enough to pick a line through rocks and roots.
At the core is a 6500 W peak mid-drive motor. Unlike a hub motor, it sits at the bike center of mass and drives the rear wheel through a single-speed gear-set, so weight distribution and drivetrain efficiency stay optimal. The motor makes 233 N.m (171.9 lb-ft) of torque and delivers it from zero rpm, which is why the bike launches without lag and pulls strongly up loose, steep climbs. A freewheel rear hub lets the wheel coast freely when you back off the throttle, preserving momentum on flats and descents.
Energy comes from a 60 V 40 Ah lithium pack good for 2400 Wh. That is roughly two to five times the capacity of a typical commuter e-bike, and it is what supports the 74.6 mi (120 km) maximum range under gentle conditions. Real-world range tracks four variables: how much throttle you use, rider and gear weight, tire pressure, and terrain. Aggressive throttle use and steep climbs reduce the number; smooth riding and firm tires extend it.
Composure comes from the running gear. Fastace full suspension - a dedicated front fork and a rear shock - keeps both wheels in contact with broken ground, and hydraulic disc brakes at both ends give consistent, modulated stopping in dry and wet alike. The 17 in alloy rims wear CST off-road tires (70/100-19 front, 80/100-19 rear) with a tread that channels mud away from the contact patch. Sealed electrical connectors and a water-resistant build let you ride through splashes and trail dust without babying the bike.
Key Features
6500 W Peak Mid-Drive Motor
A 6500 W peak motor is mounted at the frame center and drives the rear wheel through the single-speed gear-set. Central placement lowers the bike polar moment of inertia for sharper handling, and the motor makes 233 N.m of torque from zero rpm - enough to launch off the line and climb technical loose grades that would stall a pedal bicycle.
60 V 40 Ah Lithium Pack (2400 Wh)
The pack sits low in the frame and lifts out for indoor charging. 2400 Wh is enough for a long day on the trails between charges, and the battery management system watches cell voltage, temperature, and cycle count to protect long-term pack health. A full recharge takes roughly 6-8 hours on the supplied charger.
Fastace Full Suspension: Front Fork + Rear Shock
A Fastace front fork and a matched rear shock are calibrated for a broad range of rider weights and terrain. Full suspension keeps both wheels planted for traction and control, and isolates the chassis from surface irregularities so rider fatigue stays low on extended off-road rides.
Hydraulic Disc Brakes, Front and Rear
Sealed hydraulic lines actuate both calipers. Lever effort stays light and predictable when the rotors get hot, and there are no cables to stretch or corrode. The sealed system self-adjusts for pad wear and shrugs off mud and water for consistent braking deep into a ride.
Single-Speed Mid-Drive Drivetrain
The single-speed gear-set sends motor torque straight to the rear wheel with no clutch and no derailleur to misindex. The freewheel rear hub lets the wheel spin independently when coasting, cutting drag on flats and descents and helping stretch the battery range.
17 in CST Off-Road Tires
CST tires in 70/100-19 (front) and 80/100-19 (rear) wrap the 17 in rims with a knobby tread built to shed mud and bite into loose soil, hardpack, and gravel. The 17 in diameter balances obstacle rollover with quick, responsive steering feel.
LED Headlight and Brake Light
A bright LED headlight runs off the main pack, so there are no separate batteries to keep charged. A brake light that lights whenever either brake lever is pulled adds visibility from behind on dusk rides and in traffic.
Toolkit Included + Water-Resistant Build
A toolkit for trailside adjustments ships with the bike, and the electrical system is sealed against the elements. Water-resistant connectors and covered ports let you ride through splashes and dust without exposing the controller, motor, or battery to the weather.
Full Specifications
Model
HKM-689619 | Electric Dirt Bike
Frame Material
Aluminum alloy, dirt-bike geometry (seated + standing)
Motor
6500 W peak mid-drive motor, single-speed
System Voltage
60 V DC
Battery
60 V 40 Ah lithium-ion (2400 Wh), removable
Charger
Supplied smart charger, 100-240 V input
Charging Time
Approximately 6-8 hours from empty (charger dependent)
Battery Cycle Life
Approximately 600-800 charge cycles to 80 percent capacity
Top Speed
31+ mph (50+ km/h)
Range Per Charge
74.6 mi (120 km), varies with terrain, rider weight, and throttle use
Climbing Ability
Steep off-road grades; 233 N.m of torque from zero rpm
Peak Torque
233 N.m (171.9 lb-ft)
Drivetrain
Single-speed mid-drive gearset with freewheel rear hub
Brakes
Hydraulic disc brakes, front and rear
Suspension
Fastace full suspension: front fork + rear shock
Tires
CST 70/100-19 front, 80/100-19 rear, off-road tread
Wheels
17 in alloy rims
Saddle
Off-road saddle with standing-rider ergonomics
Display
Digital display: speed, battery level, mode, trip, odometer
Throttle
Twist-grip throttle with multiple power modes
Lighting
LED headlight and brake-activated tail-light
Load Capacity
Single rider plus gear (off-road use)
Bike Weight
Approximately 105 lb (48 kg) including battery
Recommended Rider
Teen to adult; suited to seated and standing control
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 60 V 40 Ah pack stores 2400 Wh of energy. For context, most commuter e-bikes ship with 480-960 Wh, so this pack runs roughly two to five times above the usual budget. That headroom is what lets the HKM-689619 cover a 74.6 mi maximum range and still have reserve for a second short loop after a long trail day.
Real-world range depends on four variables more than anything else: how much throttle you use, rider and gear weight, tire pressure, and terrain. Gentle throttle use on rolling fire roads lands near the top of the range; full-throttle climbing and heavy riders pull the number down. Cold weather below 40 F (4 C) temporarily reduces available capacity by 10-20 percent; it returns once the pack warms up.
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 considerably compared with charging in an unheated garage.
The pack unlocks and lifts out of the frame in seconds, so you can charge it at a desk while the bike stays locked outside. The charge port is accessible without removing the pack, and a toolkit for trailside adjustments ships in the box.
Daily Use & Care
- Set tire pressure for where you ride: lower pressure for loose dirt and rocks, higher for hardpack and pavement, to keep the CST knobs gripping.
- Rinse the frame, rims, and drivetrain with fresh water after muddy or wet rides. Trail film and grit attack aluminum fasteners if left in place.
- Check axle nuts, stem, and suspension clamps for torque before the first ride of each week. Mid-drive torque works fasteners loose faster than on a bicycle.
- Inspect brake pad thickness monthly. Hydraulic pads wear silently until they are gone; replace when the friction material is under 1 mm.
- Charge indoors at room temperature. Unplug the charger once the indicator turns green rather than leaving it connected for days.
- Check chain tension and lubrication every 100-150 mi, or after any ride through standing water or dust, since the single-speed drivetrain still uses a drive chain.
- Keep the charge port and display covers closed when the bike is parked outside so moisture stays out of the connectors.
What's in the Box
- 1 x HKM-689619 electric dirt bike, approximately 85 percent pre-assembled
- 1 x 60 V 40 Ah removable lithium battery pack
- 1 x Smart charger (100-240 V input)
- 1 x Toolkit (hex keys, spanners, and adjustment tools)
- 1 x Front wheel with axle hardware
- 1 x Handlebar and clamp hardware
- 1 x Pedal and control hardware
- 1 x User manual and quick-start guide
Frequently Asked Questions
How much assembly is required out of the box?+
The bike ships approximately 85 percent assembled. Remaining steps are fitting the front wheel, straightening and bolting the handlebar, installing the pedals and controls, and checking brake alignment. Budget 30-45 minutes with the supplied tools. Have a shop check torque and brake bedding if you are not comfortable doing it yourself.
Does this need a license or registration?+
Rules vary by state and locality. A 6500 W peak motor with a 31+ mph top speed exceeds the limits of the common three-class e-bike framework in many US jurisdictions, which may place this bike in a moped, off-highway, or motor-driven cycle category. Check your state DMV and local ordinances before riding on public roads or bike paths.
What range should I plan for?+
Plan for up to 74.6 mi under gentle conditions. Full-throttle climbing, heavy riders, headwinds, and low tire pressure all reduce range. Smooth throttle use and firm tires keep you closer to the top of the figure.
Is it built for real off-road use?+
Yes. The Fastace full suspension, CST off-road tires, and aluminum frame are engineered for dirt. The 233 N.m of torque climbs loose inclines, and the hydraulic disc brakes control steep descents. The water-resistant build helps protect the electricals from mud and splashes.
What kind of brakes does it have?+
Hydraulic disc brakes front and rear. Hydraulic systems modulate better and need less lever effort than cable brakes, self-adjust for pad wear, and perform consistently in wet or muddy conditions thanks to their sealed fluid lines.
Can I remove the battery to charge indoors?+
Yes. It unlocks and lifts out of the frame, or you can charge it in place through the frame-side charge port. A full recharge from empty takes roughly 6-8 hours on the supplied charger.
How long does the battery take to charge?+
About 6-8 hours from fully empty with the supplied charger. Partial top-ups take proportionally less time; there is no need to run the pack down before recharging.
How does the freewheel rear hub work?+
The freewheel hub lets the rear wheel spin freely when the motor is not driving - like coasting on a bicycle. This cuts drivetrain drag while coasting and descending, improving efficiency and range. When you apply the throttle, the hub engages and sends power to the wheel.
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 Battery2400 Wh PackHydraulic BrakesFastace SuspensionOff-Road
Why Choose the HKM-689619
Mid-Drive Torque, Not Just Speed
A center-mounted 6500 W peak motor delivers 233 N.m from zero rpm straight through the single-speed gear-set. That central placement sharpens handling and gives usable, controllable grunt for launches and climbs rather than a narrow top-speed number.
Built for Off-Road
Fastace full suspension, CST knobby tires, and 17 in wheels turn fire roads, hardpack, and rocky singletrack into rideable ground. The frame geometry supports both seated miles and standing technical sections.
Throttle-Only Riding
A twist-grip throttle with multiple power modes gives immediate, clutch-free acceleration - no pedaling required. Most riders mix modes: low for range, high for climbs and quick getaways from a standstill.
Quiet Electric Powertrain
With no engine, exhaust, or vibration, the HKM-689619 is quiet on the trail and in the neighborhood. The single-speed drivetrain keeps moving parts to a minimum, so there is less to service and far less noise than a comparable gas bike.
Zero-Emission Electric
Lithium power means no fuel, no oil, and no tailpipe emissions. For trail access where gas bikes are restricted, the electric drivetrain keeps the ride clean and the footprint light.
Water-Resistant for Trail Conditions
Sealed connectors, covered ports, and water-resistant electricals let you ride through splashes, dust, and light rain without exposing the controller, motor, or battery to the weather.
Controls & Indicators
Power Button
Located on the battery/display; hold to switch the system on and off
Mode Buttons
Up and down buttons cycle through the available power modes
Twist Throttle
Right-hand grip; proportional response, works independently of power mode
Speedometer
Live speed readout in mph, switchable to km/h in the settings menu
Battery Gauge
Segment charge indicator plus percentage readout on the display
Light Switch
Toggle the LED headlight and brake-activated tail-light from the controls
Suspension Adjust
Fastace preload and rebound dials for rider weight and terrain
Pre-Ride Safety Checklist
- Check tire pressure and set it for the terrain: lower for loose dirt and rocks, higher for hardpack and pavement.
- Squeeze both brake levers. They should firm up well before reaching the grip, with no sponginess that would indicate air in the hydraulic line.
- Confirm the battery is seated and locked, and that the display shows the expected state of charge.
- Spin both wheels and check that the rims run true and nothing rubs the brake pads or the frame.
- Verify the axle nuts and suspension clamps are tight, and that the headset has no play when you rock the bike with the front brake applied.
- Test the throttle at walking pace in a clear area before riding in traffic or on a trail.
- Switch on the headlight and tail-light if you will be riding near dusk, and wear a helmet rated for the speeds this bike reaches.
- Set the Fastace suspension preload for your weight before the first technical section of the ride.
Quick Troubleshooting
The motor does not engage when I twist the throttle.+
Confirm the display 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 the display shows an error code, note it and contact support.
Range dropped noticeably compared with when it was new.+
First check tire pressure; a soft tire is the most common cause. Then consider temperature - cold reduces available capacity temporarily. If range is down more than 30 percent year-round after many charge cycles, the pack may be approaching the end of its 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 continue riding a fast bike on compromised brakes.
The drivetrain is noisy or the chain skips.+
The single-speed chain may be loose or worn. Adjust tension at the sliding dropouts a quarter turn at a time and lubricate. If it skips under load, the chain or rear sprocket is worn and should be replaced.
The suspension bottoms out or rattles over bumps.+
Check the Fastace preload and rebound settings for your weight and terrain. If the rattle persists, inspect the stanchions for scoring and have a shop service the fork or shock if needed.
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 the conditions that produced it, then contact support - error codes map to specific faults in the controller, motor, or throttle circuits.
Certifications & Standards
The HKM-689619 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 31+ mph. Read the manual fully before the first ride and practice throttle control in an open, traffic-free area until the response feels predictable. Helmet, gloves, and off-road protective gear are strongly recommended before riding on trails or at speed.
- Wear a helmet on every ride. At 31+ mph a bicycle helmet is the minimum; many riders choose a certified motocross or downhill helmet at these speeds.
- Ride single-rider only. Do not exceed the chassis and tire limits, and keep added gear within the bike weight the frame is built for.
- Check local law before riding on public roads or paths. A 6500 W peak motor with a 31+ mph top speed may place this vehicle outside standard e-bike classifications in your area.
- 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 gravel, wet surfaces, and downhill grades; knobby tires add grip but do not eliminate the risk of losing traction.
HKM-689619 · 6500 W peak mid-drive motor (233 N.m) · 60 V 40 Ah lithium (2400 Wh) · 31+ mph top speed · 74.6 mi range · 17 in CST off-road tires · aluminum frame · Fastace full suspension · hydraulic disc brakes · single-rider off-road design. Specifications are provided for reference; actual performance varies with rider weight, terrain, tire pressure, temperature, and riding style. Range figures are measured under gentle conditions. This page describes the product only and is not legal advice regarding vehicle classification - confirm local regulations before riding on public roads.
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.
