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HKM-8174419 50cc 2-Stroke Gas Mini Dirt Bike for Kids with Inverted Fork Disc Brakes Both Wheels and 10-Inch Knobby Tires
HKM-8174419
A Red-Frame 50cc Dirt Bike for Kids
The HKM-8174419 is a gas-powered mini dirt bike built on a red steel frame with the number 87 on the front plate and the side panels. An inverted front fork holds the front wheel, a rigid swingarm carries the rear, and disc brakes sit at both 10-inch knobby wheels. The 50 cc two-stroke engine is the strongest in its class, rated up to 37 mph, and it starts on a pull rope, feeds an automatic clutch and a chain. A padded seat and a side stand finish the bike.
Key Features
Six details that define how the HKM-8174419 is built and how it rides.
Inverted Front Fork
Upside-down fork legs hold the front wheel, the stiff layout mini motocross bikes use. The fat upper tubes soak up the hits from ruts and kerbs, and the wheel stays planted under hard braking.
50cc Two-Stroke Engine
The 50 cc two-stroke is the biggest engine fitted to this mini platform, rated up to 37 mph. It mounts low in the red frame and burns unleaded gasoline premixed with two-stroke oil at 25:1.
Automatic Clutch, Chain Drive
An automatic centrifugal clutch feeds the chain, so the bike rolls away from a stop on throttle alone. There is no gear lever and no clutch lever for a new rider to manage.
Disc Brakes at Both Ends
A disc sits at the front wheel and a second at the rear, splitting the stopping work across both ends. With a 37 mph top speed, balanced braking is part of the design, not an accessory.
10-Inch Knobby Wheels
Deep-lug knobby tires wrap both 10-inch wheels, with red hubs carrying the theme through. The tread bites into dirt, grass and gravel where a street tire would simply spin.
Number 87 Race Graphics
The front plate wears the number 87, the side panels carry matching graphics, and the red frame ties it together. A padded seat and a side stand round out the finished bike.
Overview
A 50cc two-stroke mini dirt bike with an inverted fork and discs at both wheels.
The HKM-8174419 is the performance pick of the small dirt bike range: a 50 cc two-stroke rated up to 37 mph, hung low in a red welded steel frame. Power moves through an automatic clutch and a chain, so riding means throttle and brakes, nothing to shift. An inverted fork leads the front wheel, a rigid swingarm keeps the rear planted, and disc brakes at both 10-inch knobby wheels handle the stopping. The recoil starter means no battery ever stands between a rider and the next session, and the number 87 graphics give the bike its race-bike identity.
An Inverted Fork Up Front
Motocross-style fork legs hold the front wheel.
The inverted fork holds the front wheel with the fat tubes up top, the same layout the big motocross bikes run. It keeps the front end stiff under braking and quick to steer, lap after lap on loose ground.
Full Specifications
What it runs, how it stops and what it carries.
Engine, Frame and Suspension
How the 50cc engine and the inverted fork work together.
The HKM-8174419 runs its 50 cc two-stroke low in a red welded steel frame, feeding an automatic clutch and a final chain. The inverted fork keeps the front end composed under braking, and the rigid rear swingarm holds the 10-inch wheel steady without extra parts to service. A disc at each wheel does the stopping, worked by both handlebar levers. Fuel is unleaded gasoline premixed with two-stroke oil at 25:1, and the spark plug stays reachable for checks between sessions.
What’s in the Box
Everything needed to get riding, right out of the crate.
1 x Mini Dirt Bike
The HKM-8174419 frame, engine and wheels, partially assembled
1 x Owner's Manual
Setup, break-in and care guidance
1 x Tool Kit
Wrenches for the final assembly steps
1 x Spare Spark Plug
A ready backup for the 50 cc engine
1 x Warranty Card
Registration and coverage details
1 x Assembly Hardware
Bolts and fittings bagged by step
Why Choose the HKM-8174419
Six further reasons riders pick the HKM-8174419.
The Strongest Small Engine
At 50 cc two-stroke and up to 37 mph, this is the top of the small dirt bike range, a real step up for riders who have outgrown the 49 cc machines.
No Gears to Learn
The automatic clutch feeds the chain by engine speed, so the rider manages throttle and brakes only. The learning stays about balance and lines, not about stalling.
Nothing to Charge
The engine starts on a pull rope and runs on premixed gasoline at 25:1, so a session never waits on a wall outlet, and there is no battery pack to fade halfway through the afternoon.
Brakes Match the Speed
A disc at each wheel gives the kind of stopping power a 37 mph machine deserves. Both levers live on the handlebar, and modulating them smoothly is the first skill to drill.
Simple Rear End
A rigid-mounted swingarm carries the rear wheel with no shock linkage to service, so the drivetrain stays chain, sprocket and spark plug, all reachable with the supplied tools.
Race Graphics That Last
The number 87 plates and red frame are not a wrap that peels; they are the bike's own bodywork, so the machine keeps its identity through every scraped panel.
Frequently Asked Questions
Quick answers about the HKM-8174419 mini dirt bike.
What fuel does the engine burn?
The 50 cc two-stroke runs on unleaded gasoline premixed with two-stroke oil at 25:1. Mix fresh in a clean can, shake before pouring, and do not let mixed fuel sit for weeks, because the oil separates and the engine runs lean on stale mix. A spare spark plug ships in the box, and a clean plug is the cheapest fix for a bike that cranks but will not catch.
How fast does the bike actually go?
Up to 37 mph (60 km/h) in stock form, which places it at the top of the mini range. Real speed moves with rider weight, surface and how fresh the premix is. That pace deserves a closed course, full gear and an adult paying attention, every single session. If a rider is still fresh to dirt bikes, build hours on a slower machine first.
Does it have a gear lever?
No. The engine feeds an automatic centrifugal clutch, so power arrives as the revs rise and the bike rolls away from a stop without any shifting. There is no clutch lever, no stall at a stop, and no gear hunting on a slope. A rider only manages the twist throttle and the two brake levers. The final drive is a chain, so tension checks belong on the service list.
Why an inverted front fork?
Upside-down forks put the stiff, fat tube section at the top where bending loads are highest, which is why real motocross bikes run them. On a mini frame it means the front wheel tracks straighter under braking and the steering stays honest over roots and ruts. It is the same layout fitted to full-size race bikes, scaled down to a 10-inch wheel.
How does the engine start cold?
With the recoil rope. Set the bike on its side stand and pull the rope in one smooth, full stroke rather than short yanks, letting it rewind between pulls. Most cold engines catch within a handful of honest pulls. If the bike was flooded by repeated pulling, wait a minute, then pull through with the throttle shut. A fouled spark plug is the other usual suspect, which is why a spare ships in the box.
Where is the bike meant to be ridden?
On private land and closed courses, with an adult present. It is not built or approved for public roads, so keep it off tarmac traffic entirely, and check local rules before the first ride because some areas restrict small gas-powered bikes beyond the road question. Flat, open ground without holes or wire is the right classroom, and full gear is the entry fee.
Quick Troubleshooting
Common HKM-8174419 issues and what to check first.
The engine will not start
Work through the cheap causes first. Confirm there is fresh premix in the tank, because stale mix is the most common no-start on a two-stroke. Pull the spark plug, check it is dry and light tan rather than wet or dark, and swap in the spare from the box if it looks fouled. Pull the rope in full, smooth strokes rather than short yanks, since a half pull never spins the engine fast enough to catch. If the plug is wet, the engine is flooded: wait a few minutes, pull through with the throttle shut, then try again.
The engine bogs at full throttle
A two-stroke that hesitates when the throttle opens is usually being fed badly rather than broken. Start with the premix: oil that separated in an old can leans the mixture out. Next, check the air side of the engine, because a filter packed with dust after a session chokes the intake exactly this way. If both look fine, check the spark plug color after a short run, since a wet, dark plug points at a fuel mixture that needs attention. Work one cause at a time and note what changed.
The chain skips under load
A skipping chain is a tension and alignment problem until proven otherwise. Check that the chain has roughly half an inch of free play at its tightest point, and adjust the rear axle adjusters evenly on both sides so the rear wheel stays square with the front. An over-tight chain strains the bearings and an under-tight one skips exactly under throttle. Lubricate the chain after dusty sessions, and inspect the sprocket teeth while you are there, because hooked teeth will eat a fresh chain in return.
The brakes feel soft at the lever
Soft lever feel on a cable-worked disc usually means the cable has stretched or picked up grit. Check that the lever actuates the caliper fully at half travel, and take up the slack with the barrel adjuster at the lever before touching anything at the wheel. If the feel stays soft, check the disc face is clean and dry, because oily fingerprints from assembly or chain lube overspray will cut braking power noticeably. On a 37 mph machine, brake checks are not optional.
The bike pulls to one side
Start with the tires, because uneven pressure across the two wheels steers the bike more than any rider input. Check both tires are at similar pressure, then check the rear axle nuts and the adjuster marks, since a rear wheel knocked out of square after a low-speed tip will make the bike drift. If both check out, stand in front of the bike and sight the front wheel to the handlebar, because a bar that took a knock in a fall can sit off-center. Anything bent is a replacement, not an adjustment.
The idle will not settle
Give the engine a real warm-up before judging the idle, because a two-stroke idles differently cold than hot. Once warm, if the idle sits too high, too low or hunts, turn the idle screw in small steps rather than large ones and let the engine settle between turns. A dirty air filter or an aged spark plug can mimic an idle problem, so rule both out before touching anything further. If the idle stays unstable after those checks, note the plug color and contact support rather than disassembling the carburetor on guesswork.
Service & Policies
Coverage that keeps working long after the order arrives.
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.
Important Safety Notes
Read these notes before the first ride in the HKM-8174419.
The HKM-8174419 is a gas-powered mini dirt bike that reaches up to 37 mph (60 km/h), the top of its class. Read the manual before the first start, and treat rider readiness as an adult decision: this model rewards riders who already manage slower machines well. A certified helmet and eye protection belong on every ride, with gloves, closed shoes and long pants as the working minimum. Ride only on private land or closed courses, never on public roads, with adult supervision. Check tire pressure, chain tension and brake action before each session, and let the engine cool before refueling.
HKM-8174419 - gas-powered mini dirt bike with a 50 cc two-stroke engine, red welded steel frame, inverted telescopic front fork, rigid rear swingarm, front and rear disc brakes, 10-inch knobby wheels, automatic clutch with chain final drive, pull starter, twist-grip throttle, number 87 plates and graphics and a side stand. Read the manual before first use. Nothing here is safety certification advice.
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
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The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
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Every part warranted for two full years.
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Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
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Available 24 hours a day, 7 days a week
