This merchandise cannot be sold to:CA.

Skip to product information
1 of 27

SYX MOTO MK 40cc 4-Stroke Kids Mini Dirt Bike – Automatic Gas Pocket Bike with Pull Start, EPA Approved

SYX MOTO MK 40cc 4-Stroke Kids Mini Dirt Bike – Automatic Gas Pocket Bike with Pull Start, EPA Approved

40cc Kids Off-Road Trail Bike with Speed Governor & Automatic Drive

Regular price $299.00 USD
Regular price $899.00 USD Sale price $299.00 USD
Sale Sold out
Shipping fee calculated at checkout.

Shipping Fee: $99.99

Shipping Notice

1. This product ships to 47 Continental States in the USA. Please note that this model is not CA legal. So we do NOT ship it to CA.

2. Receiving time = Processing time + Shipping time.

Processing: usually 1-2 business days.

Shipping time: usually 1-5 days.

Restricted Areas

This merchandise cannot be sold to:CA.

Specifications

OVERVIEWS
MODEL NUMBER AND NAME KXD708B-1(MK40)
TOP DESIGNED SPEED 18.64 mph (30KM/H)
MAX RANGE 15.53 miles (25KM)
MAX LOAD 132 LBS (60KG)
RECOMMENDED USER AGE 12+ years old
ENGINE
ENGINE TYPE 40cc, single cylinder, 4 stroke, air cooled, downward cam, vertical, pull start
DISPLACEMENT 38.95 cc
BORE*STROKE 40mm
COMPRESSION RATE 9.6:1
STARTING MODE Pull Start
IDLE SPEED 3000±150 rpmz
SPARK PLUG TYPE CM7H
FUEL GRADE ≥90#
LUBRICATION TYPE Negative pressure splash lubrication
LUBRICATION OIL GRADE SF 10W/30 or equivalent model
CARBURETOR TYPE Engine dedicated
AIR FILTER Sponge
COOLING TYPE Air Cooled
TRANSMISSION
TRANSMISSION TYPE Automatic
NUMBER OF SPEEDS No gear
DRIVE MODE Chain
CHASSIS
FRAME Iron
HANDLE BAR Iron
TRIPLE CLAMP aluminum
SWING ARM Iron plate forming
FOOTPEGS Iron
MUFFLER TYPE Engine with exhaust, front exhaust
CHAIN T8F 140L
WHEEL BASE 32.3 inches (820mm)
GROUND CLEARANCE 7.9 inches (200mm)
TURNING CIRCLE DIAMETER 51.2 inches (1300mm)
SEAT HEIGHT 23.6 inches (600mm)
HANDLEBAR HEIGHT 29.9 inches (760mm)
BRAKE & SUSPENSIONS
BRAKE OPERATION MODE Front and rear mechnicial disc brakes
SHOCK ABSORBER-FRONT LENGTH 530mm
SHOCK ABSORBER-REAR LENGTH 8x190mm
TYRE TYPE-FRONT 2.50-10
TYRE TYPE-REAR 2.50-10
RIM TYPE-FRONT aluminum/Black
RIM TYPE-REAR aluminum/Black
DIMENSIONS
FUEL TANK CAPACITY 0.27 US Gallon (1.0L)
BIKE SIZE
48.43 x 23.62 x 31.50 inches (1230x600x800mm)
PACKING SIZE
42.13 x 11.81 x 21.46 inches (1070x300x545mm)
DRY WEIGHT 49.6 LBS (22.5KG)
WET WEIGHT 51.4 LBS (23.3KG)
SHIPPING WEIGHT 59.5 LBS (27KG)
CURB WEIGHT 183.6 LBS (83.3KG)

Model Number

MK

Warranty Policy

We warranty the products to be free of material defects in workmanship for the warranty period from the date your product is delivered. Damages on Arrival shall be notified WITHIN 3 BUSINESS DAYS UPON DELIVERED.

Engine is covered to be free from manufacturer defect for three (3) months.

Parts are covered under warranty to be free from manufacturer defects for one (1) month.

Policy Link:Warranty Policy

Beginner-Friendly Automatic Ride No clutch, no manual shifting, no hassle. The fully automatic transmission allows young riders to focus entirely on balance, steering, and confidence-building. Just pull start and smooth throttle control takes over.

Safety-Focused Design & Speed Control Equipped with a built-in speed governor to limit maximum velocity, an instant kill switch for emergencies, and dual front & rear mechanical disc brakes. The specially sized brake levers are optimized for smaller hands to grip effortlessly.

Clean & Quiet 4-Stroke Engine Powered by a reliable 38.95cc 4-stroke engine—no messy oil-gas mixing required. It delivers a smoother ride and runs significantly quieter than traditional 2-stroke mini bikes, keeping the neighbors happy.

Rugged Construction & Durable Iron Tank Features a heavy-duty iron frame and an impact-resistant iron gas tank built to withstand the bumps and scrapes of backyard exploration. Keeps fuel secure during outdoor adventures.

All-Terrain Off-Road Capability Tough 10-inch knobby tires combined with front and rear suspension handle grass, dirt tracks, and uneven backyard trails with ease, expanding outdoor sport possibilities.

EPA Approved & Environmentally Friendly Meets strict EPA standards for emissions and efficiency. Designed for long-lasting engine life and hours of outdoor recreation.

Kickstart your child's outdoor sports journey with the SYX MOTO MK 40cc 4-Stroke Mini Dirt Bike. Specifically engineered for youth riders (Ages 12+) ready to experience the thrill of off-road riding, this mini gas bike combines manageable power with essential safety features.

Powered by a fuel-efficient 40cc 4-stroke engine, it eliminates the need to mix oil and gas—just fill up with standard regular unleaded fuel and go. With a top designed speed of 18.64 mph and a maximum load capacity of 132 lbs, it delivers the perfect balance of excitement and control. The fully automatic transmission means no complicated gears or clutches to learn, making it the ultimate entry-level choice for beginners tracking private trails or riding in the backyard.

Important Safety Notice: Always wear a helmet and protective gear while riding. Designed for use on private property and designated off-road trails only. Adult supervision is required at all times.

Adult supervision required for children under age 16. Always wear a DOT-compliant helmet, goggles, long sleeves, long pants, over-the-ankle boots, and gloves. This vehicle is intended for off-road recreational use only.Not street legal. Check local laws before operating.

View full details

Questions & Answers

Have a Question?

Ask a Question