The Beast GMX 125cc Sports Kids Quad Bike

Name: The Beast GMX 125cc Sports Kids Quad Bike
Brand: GMX
Price: 1504.00 AUD
Availability: InStock

by GMX Motorbikes

SKU GE-YX125-BLK

Sold out

$1,504.00 - $1,504.00

$1,504.00

$1,504.00 - $1,504.00

$1,504.00

Delivery: Typically 2–5 business days depending on your location.

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WHY SHOP WITH US?

Price Match Found it cheaper? Add the item and competitor details and we'll match or beat it where possible.
Assembly? We’ll organise it We can organise assembly for you. Add your item and address and we'll confirm availability and price.
Traditional layby: pay it off over time Pay it off over time with no interest. Tell us what you want and your ideal timeframe.
Invoice & PO available Schools, centres and businesses can order with a formal invoice or purchase order.
Returns made easy Quick and simple returns with no mess and no fuss.
12 month warranty + lifetime support Full manufacturer warranty support, handled locally for the life of your purchase.

Serious Power For Confident Young Riders

The Beast GMX 125cc Sports Kids Quad Bike

The Beast GMX 125cc combines power and precision to deliver an exhilarating off-road experience for budding adventurers. Its robust 125cc 4-stroke engine effortlessly conquers dirt trails and grassy fields, while an ergonomic design ensures a comfortable, secure seating position. Recommended for ages 12 and up, it's a sporty, stylish choice for young riders who want a serious step up in performance.

✓ Authorised GMX Dealer ✓ 12,000+ Happy Customers ✓ Serving Aussie Families Since 2012 ✓ Layby Available

The Beast GMX 125cc Sports Kids Quad Bike

What's Included

Supplied up to 90% pre-assembled, with minor final assembly required.

✓125cc Lifan 4-Stroke EngineGMX Series 1 engine with electric start.
✓Semi-Automatic Transmission with ReverseR-0-1-2-3 gear pattern for a more advanced ride.
✓8-Inch Heavy Duty TyresFront and rear tyres built for varied terrain.
✓Twin Exhaust & Hydraulic Disc BrakesPerformance styling with strong, consistent stopping power.

Serious Performance

A 125cc 4-stroke engine for real adventure

The Beast GMX 125cc's robust 4-stroke engine effortlessly conquers various terrains, from dirt trails to grassy fields, providing an ultimate adrenaline rush for confident young riders.

Comfort Meets Control

An ergonomic design for secure seating

The Beast GMX 125cc boasts an ergonomic design, ensuring a comfortable and secure seating position for lots of adventure.

Stylish & Sporty

A sporty look and vibrant colour options

With its sporty look and vibrant colour options, it's a stylish choice for young riders who want to make a statement while exploring the great outdoors.

Engine & Performance at a Glance

Key figures before you buy.

Engine Size 125cc (4-stroke, single cylinder, air-cooled, Lifan 154FMI)
Top Speed 70 km/h (depending on terrain)
Max Rider Weight 120kg
Recommended Age 12 years and above

Technical Specifications

Everything you need to know before it lands on your driveway.

Engine & Performance

125cc Lifan 154FMI / GMX Series 1 engine, 4-stroke single cylinder, air-cooled
Electric start, CDI ignition
Semi-automatic transmission with reverse (R-0-1-2-3)
PZ22 carburetor, regular unleaded fuel (92 RON or higher)
Maximum power 5.4kW / 8HP at 8500rpm
Maximum torque 7.5N.m at 6500rpm

Frame & Build

Seat height 710mm, wheelbase 940mm
Ground clearance 85mm, spring shock absorber
Front and rear hydraulic disc brakes, twin exhaust
Product size 1450 x 980 x 1000mm
Product weight 95kg, gross weight 115kg

Safety Features

Always wear a motorbike-standard helmet plus protective gear — goggles, long sleeves, long pants, boots and gloves — when riding
Adult supervision required at all times during riding
Off-road / private property use only — not registered or road legal
Never carry a passenger; this is a single-rider machine
Always keep to the manufacturer's maximum load rating

Warranty

Parts replacement warranty; labour costs are not included. A small engine mechanic's report may be required to process a claim.

What's In The Box

The Beast GMX 125cc quad bike, supplied up to 90% pre-assembled
Minor final assembly required — a qualified small engine mechanic is recommended

Frequently Asked Questions

Common questions from Aussie parents.

What age is The Beast GMX 125cc suitable for?

GMX recommends this model for riders aged 12 years and above.

How does the transmission work?

It uses a semi-automatic transmission with a R-0-1-2-3 gear pattern, including reverse, giving more experienced young riders a bit more control than a fully automatic quad bike.

Does it need to be assembled?

Yes. It arrives up to 90% pre-assembled, with minor final assembly required. GMX recommends this is completed by a qualified small engine mechanic.

What safety gear is needed?

A motorbike-standard helmet is essential, along with goggles, long sleeves, long pants, boots and gloves. Adult supervision is required at all times.

Is this quad bike road legal?

No. It's designed for off-road and private property use only and is not registered or road legal.

Store FAQ’s

Do you offer layby?

Yes. We can set up a simple layby on most items—no interest, just easy instalments. Your order ships once the balance is paid. Pop a layby request through or message us and we’ll set it up.

How long until my order dispatches?

Most products leave the warehouse in 1–3 business days after payment clears.

How long does delivery take?

Courier time depends on your state and the size of the item. Metro is usually quick; 1–3 days for the East Coast and 4–5 days for the West Coast. Regional/remote can take a bit longer. You’ll get tracking once it’s collected.

Do you offer assembly?

Yes—in most areas. We work with insured installers who know our brands well. Ask for an assembly quote and we’ll book it once the item is received.

What warranty is included?

All products are covered by the manufacturer’s warranty (length varies by brand). Majority are 12 months. Some are longer—check each product or ask our team. We’ll organise the fix with the supplier—fast and fuss-free.

Do prices include GST?

Yes, all of our products are GST inclusive.

Do you price match?

Yes we do! Same product, same payment method? Done. Send us the link and we’ll take a look.

Easy Returns

Change of mind? We have you covered

TRADITIONAL LAYBY

Old-school layby. Easy as.

Product Assembly

We have assembly options to make your life easier

PRICE MATCH

We won't be beaten on price.