Product Code: PC13A225

Funbikes Viper 125cc Grey Junior Petrol Quad Bike In Stock

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In Action: Unleash the Beast | Viper 125cc Quad
In Action: Viper 125cc Let Loose on the Trails
In Action: Viper 125cc | Junior Quad Bike - All (big) kids should have one!
In Action: Funbikes Off-Road! | WE HAVE THEM ALL!
360 Preview: The FunBikes Viper 125cc is built to rip through anything
360 Preview: FunBikes Viper 125cc
360 Preview: VIPER 125 | Junior Petrol Quad Bike
Funbikes VIPER 125
Viper 125cc | Assembly Video

Unleash the Beast – The Ultimate Off-Road Quad!

Get ready to dominate the track and turn heads at every turn!

  • Built for Off-Road Action: Designed and manufactured to handle the toughest terrains with ease.
  • Junior Powerhouse: Perfectly suited for juniors up to 95kg, delivering performance that leaves the competition in the dust.
  • Track Envy Guaranteed: This beast will make you the star of the circuit!

Take your off-road game to the next level with a quad that’s engineered for thrills and built to perform.

 

Features Include:

125cc 4 Stroke with Electric Start

125cc 4 Stroke with Electric Start

The Viper is built to tackle every challenge effortlessly, thanks to its robust design and powerful engine:

  • Ample Bottom-End Torque: Our 125cc 4-stroke engine ensures smooth, reliable power delivery for any adventure.
  • Freshly Revised for 2025: Now equipped with an electric starter, making it easier than ever to fire up the quad—no more hassle with a kick start!
  • Versatile and Reliable: Designed to handle whatever you throw its way, the Viper is ready for action.

Experience performance, convenience, and durability—all in one exceptional off-road machine!

Independent Front Suspension with a Live Rear Axle

Independent Front Suspension with Mono Shock Rear Axle

Unmatched Control and Thrilling Performance

Take on any terrain with confidence and enjoy an exhilarating ride:

  • Camber Adjustable Independent Front Suspension: Combined with a wide track for exceptional stability and precise control, even on challenging surfaces.
  • Mono-Shock Rear Axle: Delivers superior handling and responsiveness, ensuring even experienced riders can push the limits and have a blast.

Whether you’re navigating rough trails or hitting the track, this setup offers the perfect balance of control and excitement!

Durable Off-Road Tyres

Durable Off-Road Tyres

Equipped with premium off-road tires, this machine is ready for the toughest challenges:

  • Engineered for Off-Road Excellence: The tires are specifically designed to provide outstanding performance across rugged terrain.
  • Unmatched Grip: Maintain traction effortlessly, even in the most adverse conditions.
Stopping power

Stopping Power

Stay in command with a braking system designed for performance and responsiveness:

  • Twin Drum Front Brakes: Delivers reliable and consistent stopping power.
  • Hydraulic Rear Disc Brake: Offers a positive braking feel with the capability to lock up the rear wheel for tight, controlled maneuvers.

Whether you’re navigating tricky trails or pulling off sharp turns, this setup ensures you have the stopping power and control you need.

Stopping power

Enhanced Visibility with LED Lighting

Safety and style come standard with advanced LED lighting:

  • Brilliant Illumination: LED lights ensure you’re clearly visible, even in low-light or dark conditions.
  • Rider Safety First: Stay seen and ride confidently, no matter the time of day.

With LED lighting, your adventures don’t have to stop when the sun goes down!

Safety Features

Safety First – Ride with Confidence

The Viper is designed with essential safety features to ensure peace of mind for parents and a secure ride for kids:

  • Safety Lanyard and Kill Switch: Instantly cut the engine in case of an emergency, providing an added layer of control.
  • Restrictable Throttle: Easily adjust the power output to match the rider's skill level, giving parents full control over how much power is available.
Chromoly Powder Coated Frame

Built to Last – Reinforced Chromoly Frame

The Viper is tougher and more durable than ever, thanks to its upgraded frame:

  • Chromoly Construction: Engineered with a reinforced chromoly frame for superior strength and resilience.
  • Powder Coated Finish: Adds a layer of protection against wear and corrosion, ensuring long-lasting durability.
Thumb Operated Throttle

Thumb Operated Throttle – Designed for Safety and Control

The Viper prioritizes rider safety and ease of use with its thoughtful throttle design:

  • Thumb Operated Throttle: Ensures the wrist stays straight on the handlebars, significantly reducing the risk of injury in the event of a head-on collision.
  • Adjustable Power: Features a restrictor screw on the throttle, allowing parents to customize the power output to suit any rider’s experience level.
High Quality Moulded Plastics

Sleek Design with Premium Plastics and Graphics

The Viper isn’t just built for performance—it’s designed to turn heads:

  • High-Quality Moulded Plastics: Accurately shaped for a perfect fit, ensuring a polished and durable finish on every bike.
  • 3M Graphics Kit: Made with premium vinyl, these vibrant and long-lasting graphics ensure you’ll look great while tearing up the track.

With its bold design and quality materials, the Viper combines style and substance

 

Further Details:

  • Transmission: Chain Drive with Fully Automatic Centrifugal Clutch
  • Bars: Handlebars with brace bar and pad
  • Fuel / Capacity:  Unleaded petrol / 2 litres
  • Oil: 10w-40
  • Seat to Floor: 66cm
  • Seat to Footrests: 42cm
  • Gross Weight: 99 Kg
  • Net Weight: 87 Kg
  • Max Rider Weight: 95 Kg

 

Suitability & Safety Guidance

Due to varying safety legislation and the performance capability of this product (up to 34mph), age recommendations alone are no longer considered a reliable indicator of suitability.

To ensure the rider's safety, comfort, and control, FunBikes now uses measurement-based guidance. Parents and guardians are required to assess suitability based on the rider's physical size, coordination, and ability — rather than age alone.

Fitment Guide

This quad is best suited for children with the following body measurements:

  • Seat-to-Footrest Leg Measurement: 37cm to 47cm (measure from the bottom of the thigh to the sole of the foot while seated)
  • Maximum Rider Weight: 95kg
  • Overall Bike Dimensions: L148cm x W98cm x H89cm

How to measure: Sit the rider on a flat chair and measure from the underside of their thigh (where it meets the seat) to the sole of their foot. This gives the seat-to-footrest distance — it should fall between 37cm and 47cm for proper posture and safe operation.

Performance

This quad bike is capable of speeds up to 34mph and includes an adjustable speed restrictor. Due to its speed and power, it may not be suitable for children under 14 years old.

  • Max Speed Performance Age Classification: 14+
  • Parent's Discretion Advised: Consider height, leg length, coordination, and prior riding experience before purchase.


Important Safety Notice

FunBikes strongly advises all customers to supervise young riders at all times and to ensure the use of appropriate safety gear, including a helmet, gloves, and knee/elbow protection. The Viper is designed for use on flat, off-road terrains such as grass, gravel, or compacted soil and is not a ride-on toy, but a scaled-down powered quad bike.

 

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Support

We offer a full support service with FREE lifetime telephone technical advice and stock standard & performance parts. Servicing & Maintenance checks are also available - Call for details.

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Assembly

As standard, this model requires partial assembly. Approx. 60 minutes. Please see our example assembly videos for more information. This vehicle is shipped with transport oil only. An oil change must be completed before any use.

Warranty icon

Warranty

Standard 6 Month Manufacturing Defect Warranty (Excludes Consumable Items). Unless otherwise stated this product is not designed for Motocross, Mini or BMX tracks and such use will invalidate the warranty. Limitations – Any modification, use of noncertified accessories, water ingress, misuse or incorrect assembly, lack of or incorrect maintenance, incorrect parts installation, or collision damage, will invalidate the warranty. Commercial use is prohibited.

Advice icon

Advice

A mechanically able person will be required to carry out the assembly and long-term maintenance of this product. Maintenance will be required to service the bike and fit parts to this product as usage requires. Please consider these requirements before purchasing the item. We do offer a FREE support line where our mechanics will diagnose problems and help you source any required parts, but you will be required to fit those parts and assist in the diagnosis.

 
Boxed Dimensions L131cm x W76cm x H64cm
Brakes Front Drum - Rear Disc
Built Dimensions L148cm x W98cm x H89cm
Colour Grey
Cooling Forced Air Cooled
Drive Automatic
Engine Oil SAE 10W-40
Engine Spec 4 Stroke - Single Cylinder
Engine Type Petrol Engine
Frame Chromoly Steel
Fuel Unleaded
Fuel Capacity 2.0 Litres
Gross Weight 99 Kg
Kill Switch Rocker On-Off
Lights Front - Rear - Brake
Manufacturer Recommended Age 16+
Max Rider Weight 95kg
Max Speed Performance Age Classification Guide 14+ - Height, Weight & Skill should be considered
Motor Size 125cc
Net Weight 87 Kg
Requires Some Assembly Assembly: Front Bull Bar - Rear Bar - Wheels - Front Suspension - Handlebars - Footwells
Rim Size F: 7 inch - R: 7 inch
Safety Features Rider Safety Lanyard
Seat Height Seat to Footrests 42cm
Start Type Electric Start
Suitability Seat to Footrest Measurement - 37cm-47cm
Terrain Full Off Road
Throttle Type Thumb Throttle
Top Speed 55 km/h Dependant On Rider Weight & Terrain
Transmission Chain Drive with Fully Automatic Centrifugal Clutch
Tyres Front: 16 x 8.00-7 / Rear: 16 x 8.00-7
Warranty 6 Months Manufacturing Defects (Excludes Consumable Items)

* Product specifications are subject to change without notice and may vary from those shown. Errors and omissions excepted.

You can view your estimated delivery time & charges by either clicking the “Check Delivery Charges & Time” button, or by using the “Confirm Delivery Charges & Time” button in the checkout. Estimates for your delivery charges and the receipt of your goods will be confirmed in the checkout process.

1. Dispatch of Your Order

1.1 All goods are subject to availability.

1.2 Items ordered will be delivered as soon as possible in accordance with the requested delivery service. All delivery charges are shown for items in stock to U.K. mainland addresses only. If you require delivery to non-U.K. mainland address charges will vary depending upon the destination. Please contact us to discuss your requirements.

1.3 We will try to ensure that delivery is made within the estimated time scales.

1.4 Items ordered for collection using Click & Collect will be prepared as soon as possible. Communications will be sent by Email and Text to confirm the item is ready for collection with an expected collection time by the buyer of up to 7 days post confirmation the item is ready to collect.

1.5 For products listed on our Web Site outstanding orders can be cancelled at any time. In instances where payment has already been made, an alternative or refund in full for the item(s) concerned will be given.

2. Delivery

2.1. You should check your order carefully when it is delivered to you. In the event of any goods delivered by us being damaged in transit, or failing to match the items ordered by you, then you should notify us promptly. We use independent couriers in order to deliver goods to you a quickly and efficiently as possible. We need to hear from you as soon as possible if you believe that your order has been damaged in transit so that we can investigate the matter with our couriers.

2.2. Any product with free delivery will only include the free service within mainland England. And the items will be sent by economy service and can take up to 7 working days.

3. Returns and Exchanges

CANCELLATION AND RETURNS POLICY ONLINE AND OVER THE PHONE ONLY

We want you to be entirely satisfied with every purchase made from us and we aim to offer you excellent quality, value and service at all times.

3.0 If you wish to cancel your order:

3.1 You can contact us via email at cs@funbikes.co.uk or phone on 01664 498 640 and quoting your order reference number.

3.2 You can notify us of your wish to return the goods to us for a full refund or exchange within the first 14 days of receipt, and a further 14 days are given for the goods to be received at our address. Preferably, the goods should be in the original packaging. The cost of returning the item is yours to bear.

3.3 Once we have received the item/s back you will receive a full refund or an exchange for credit for the amount paid. All refunds will be repaid into the same account from which payment was made.

3.4 The rights to return your items will not arise if the item/s have been used, damaged, modified or broken. This statement does not affect your statutory rights.

3.5 If any item is returned to us in a non-saleable condition, we have the right to reduce your refund up to the full purchase price.

3.6 Faulty or Damaged Goods: Online, Phone and Store Purchases.

3.7 You take full responsibility on receipt of the items you have ordered. Please contact us as soon as possible if any damage, fault occurs with your item within your warranty period. We may ask you to provide a picture of the damage via email. We will look at sending a replacement part to fix the issue but if a part will not resolve the problem then we will offer a return of the vehicle for a fix. A replacement/refund if deemed damaged beyond repair. A refund will not be offered on any assembly, misuse or wear and tear on the item. Please note that if a replacement is given this may be a refurbished item if the vehicle returned is used.

2-stroke engines produce more torque at higher RPM and are light and powerful. 4-stroke engines have more torque at lower RPM, are heavier, quieter and very efficient and durable.
We offer an assembly service on selected products. "Add Assembly" includes a complete build, test ride and pre-delivery inspection of the item, and we will deliver your vehicle "Ready to Ride!" Adding assembly may affect your delivery price and despatch estimate as we will automatically upgrade your order to a premium network service. You may choose assembly by ticking the "Add Assembly" option on the product page or the X under Assembly in the checkout.
All of our Pit Bikes use inner tubes but a lot of our other vehicles are tubeless. As a rough guide, hub motors tend to be tubeless, and split rims tend to be tubed. Generally, if you can see a 'car style' valve on your rim, your wheel is likely tubeless. If the valve has movement and looks like a push bike valve, it is likely tubed.
All our products come with a warranty. The warranty will vary dependent on the model. For specific information, click the "DESCRIPTION" tab and scroll to "Warranty" at the bottom of the page.
We strongly recommend using E5 "Super Grade" (97+ Octane) petrol only in our vehicles. E5 has less Ethanol than E10, and although E10 is suitable for vehicles used regularly, it may cause maintenance issues in vehicles used infrequently. At 10% Ethanol, the E10 fuel will age, degrade and split faster if left in the tank or carburettor or stored than E5 and is also more corrosive on vehicle parts. If a vehicle is unused for an extended period, the most likely cause of not starting is the petrol. With the recent addition of Ethanol, petrol only has a 3-6 months shelf life, and you can expect approximately three weeks at summer temperatures in a vented fuel tank. After this time, the performance will suffer. As petrol ages, it will change noticeably in colour, smell, and viscosity. Running your vehicle with aged fuel will cause hard starts, poor performance and gums may cause blocks in the carburettor and plug fouling. We strongly recommend that you use or drain the fuel before storing your vehicle for an extended period. Before looking for failing components or setup issues, replace the petrol in the tank, and if necessary, empty, check and clean the carb.
We keep OEM & performance spares for our products in stock. Free lifetime technical support is offered on our products by phone and in our "Online Support Centre" You may talk to our mechanics for help and advice and login for support & info about your purchases.
Our products are not legal for road use in the UK unless "Road Legal" is in the product description. The rider is responsible for following the laws and that adequate safety equipment is worn.
We offer Free, Economy, Express, or Saturday Delivery options depending on your location. To confirm what options are available for your item, view charges, and an estimate for your item's receipt, click the "Check Delivery Charges & Time" button on the product or the Checkout page and enter your postcode.
2-Stoke engines - Semi-Synthetic 2-stroke Oil. 4-Stroke engines - Semi-Synthetic 4-stroke Oil 10W-40.
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