Atomik 250cc Red Nitrous Dirt Bike

Atomik 250cc Red Nitrous Dirt Bike

The 2011 Nitrous 250cc Enduro and MX bike with a seat height of only 890mm, the Nitrous 250cc can be comfortably ridden by all teenagers, and even smaller stature adults... giving the full benefits of the 250cc OHC engines raw power, and the ability to maintain complete control and manouverability for all riders of  all heights. The Atomik 250cc powerful overhead cam engine, giving distinct performance advantages over standard old technology push-rod engine designs. Overhead cam (OHC) valve-train configurations place the engine camshaft within the cylinder heads, above the combustion chambers and drive the valves in a more direct manner compared to pushrods. Atomik have also put in a performance camshaft into this engine, producing faster revs, and improved low-range power. This engine also has incorporated a start-in-any-gear feature allowing you to quickly get back into the race, if you stall it.

With the latest design Motocross inspired chassis we have already achieved 1st 2nd and 3rd placing in the Asian motocross series, now you too can share in our latest technology at your local club meeting or casual ride day, the new frame design makes this dirt bike very manoeuvrable on the track or trail, whilst retaining the strength to tackle the biggest jumps on any freestyle motocross (FMX) track.

Take a closer look of the Atomik Nitrous 250cc, you’ll notice its loaded with high quality precision forged aluminium components, which are lighter and stronger than any other alloy, such as steel, cast alloy, or rolled aluminium. The new alloy hubs lighten the bike, and are superior in strength to other hubs made of other materials.

The reliable and durable, long travel USD forks don’t bottom out on the big jumps, and are solidly attached to frame by a set of forged alloy clamps and triple tree. Holding up the rear suspension, is a heavy-duty Atomik 1200lbs shock with reservoir. Both front fork suspension and rear shock on the Nitrous 250cc is fully adjustable in rebound, compression and pre-load settings, to suit the rider’s weight, riding terrain conditions, and hardness and softness preferences. The rear shock is also protected from tyre flick-up of mud, dirt and rocks by an innovative durable plastic guard, to ensure continued maximum shock effectiveness whilst riding.

The Atomik Nitrous 250cc sports a neat set of strengthened rims, 19” on the front and 16” on the rears, a stronger material than alloys. It also comes with durable Motocross high grip tyres, designed for sand and mud conditions that feature aggressive tall knob patterns for deeper terrain bite with sufficient knob spacing for self-cleaning. The 19” front and 16”inch rear Knobbys also feature improved casing structure for sidewall stability at low pressures. 

An aftermarket standard stainless muffler on a 38mm race pipe increases power up to 21HP and engine attitude is adjusted at the flick of a wrist of the  throttle, immediately flowing fuel through the 30mm MIKUNI carbie.

A lethal combination of the highest quality materials, latest technological design and manufacture methods, have made the Atomik Nitrous 250cc, a preferred choice for all serious  MX riders.

Maximum Speed95km/h
Seat Height890mm
Bore x Stroke65.5mm x 66.2mm
Front SuspensionHigh performance USD Forks with double adjustable
Rear SuspensionNitrogen Charged Gas Shock with Gas Reservoir & Adjustable Preload
Front Tyre70/100 - 19 High Grip Motocross Tread Pattern Knobby Tyre
Rear Tyre90/100 - 16 High Grip Motocross Tread Pattern Knobby Tyre
Final DriveKMC #520 Chain
Rear Rim1.85 x 16 Steel Rim with Heavy Duty Spokes & Alloy Hub Assembly
Tyre Pressure18 psi
Handlebar GripsSoft High Grip Rubber
Magneto TypeElectronic Ignition System
Ground Clearance310mm
SwingarmHeavy Duty steel Swingarm
Fuel Capacity4L
Engine Oil GradeNon Synthetic 10W/40SF - 4 Stroke Engine Oil
Optimal Engine Oil Level1000mL
Intake / Exhaust38mm Race Pipe + Sport Tuned Stainless Steel Muffler
Engine ModelGenuine Atomik Zongshen OHC Engine - 250cc
Starting ModeElectric Start + Kick Start
Ignition TypeCDI
Clutch TypeHeavy Duty Wet Multi Plate
Cooling SystemAir Cooled
Transmission5 SPEED Manual - 1N2345 - START IN ANY GEAR
Fuel Delivery System30mm JINKE Carburetor
Fuel FilterHi Flow Transparent Fuel Filter
Front BrakeHydraulic Brake with Twin Piston Caliper - Ventilated Wave Disc Rotorr
Fuel TypeRegular Unleaded (92 or higher)
Rear BrakeHydraulic Brake with Twin Piston Caliper - Ventilated Wave Disc Rotorr
Gearing41 Tooth Rear
Idle Speed1500rpm
Maximum Output21HP
Maximum Power15kW
Maximum Load120kgs
Product Size2020 x 800 x 1210mm
Important Safety & Product InformationAlways wear a helmet, product clothing and gear such as goggles, long sleeves, long pants, boots and gloves/hand protection when riding these products. For motorised products a motorbike standard helmet needs to be worn. Never let children ride dirt bikes that are meant for adults, even as passengers. Do not carry any passengers on dirt bikes that are meant for one person. Dirt bikes are not all-terrain vehicles so they cannot go safely on all types of terrain. Avoid riding on rough terrain or steep slopes. Ride on familiar tracks and beware of obstacles. Never ride under the influence of alcohol/drugs. Ensure children are supervised at all times near any dirt bike activity. Always carry a mobile phone or radio device so you can contact help in case of an emergency. Always adhere to the maximum load of the product. Minor assembly is required In the interest of safety it is recommended that you have this bike assembled by a skilled bike mechanic. You may need to provide proof of being assembled by a skilled mechanic, if not a report from a small engine mechanic advising the issues to process you warranty claims. Labour is not covered under warranty. Warranty is a parts replacement warranty and does not cover labour costs. Defective parts may need to be sent back to us for inspection. Before using the product, check that all nuts, wiring and bolts are tightened as they can become loose during shipping. For the first tank, run in the engine, please do not over-rev the engine for the first 1-3 months as the engine is new and should be treated as such. This item is intended for off road use only.
Product Weight116kgs
Gross Weight134kgs
Packaging Dimensions1700 x 460 x 970mm

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Atomik Warranty

Atomik strives to provide the best after sales service for all our valued customers. We pride our self to deliver quality products and services. All products are extensively tested prior to packaging. We warrant that all products are free from defective material and defective workmanship, and we will replace or repair any part that proves to be defective, without charge, upon an approved warranty claim. All items are sold in a crate as pre assembled! Some items are assembled at 90% and some are only at 70% assembled. Atomik highly recommend that you use a qualified mechanic to assemble all items for warranty and safety.

Warranty Periods

Atomik products come with a manufacturer warranty if the product is purchased in a crate this will be at the standard period. If this item is assembled by Go Easy Australia this may extend the warranty period to the assembled warranty period. Click here to view the full terms and conditions and warranty periods. 

Warranty Exclusions

•  This warranty does not cover damage due to misuse, abuse, incorrect assembly, improper and irregular maintenance, or accident or collision.
•  In similar policies to Honda, Yamaha, and Kawasaki, any Atomik bike or quad used for racing or competition purposes will not be covered by this warranty.
•  Although it has been checked during manufacture, prior to packaging, and prior to dispatch, please ensure all bolts & nuts and spoke are tightened before use (MUST CHECK ALL BOLTS & NUTS this includes engine bolts etc), and all parts are functioning correctly. Your warranty will be voided if your item has not been assembled correctly, prior to use.
•  Parts is only covered if it is deemed to be factory fault, NOT if the item was misuse, improper assembly or irregular maintenance and not for any wear & tear such as worn out tyres, dead battery, ripped seat and etc.
•  Any modification/upgrade none atomik parts installed incorrectly and causes any damages to your item warranty will NOT be accepted under any circumstances.
•  Customer must provide and invoice number as proof of purchase and confirm the vin & engine number.

Labor is not included a part of the warranty, this is a parts replacement warranty.

How a claim is made

When making a claim, you will need to provide proof of purchase, condition photos of the item and the VIN and Engine number from the product. This information is required to be submitted via the support center and communication is made through the support center. When the claim is created, the customer will receive the claim number and the customer support team should reply within 48 hours.

What payment types are accepted?

VISA, MasterCard, American Express, PayPal and GoEasy Gift cards.


Go Easy Bank Transfer Details

Commonwealth Bank
Account name: Go Easy Online
BSB: 063 120
Account Number: 102 44 175
*Please ensure when making payment that the order number is used as the payment reference,
if this is not done delays cam occur in applying payment to your order.


How do I know my card details are secure?

We use Secure Socket Layer (SSL) and payment gateway for all orders placed to ensure the security of your personal card details.
Our secure web pages can be identified by their URL: that begins with 'https://', while standard pages begin with 'http://'.
A padlock or key will also be visible in the bottom right of your web browser.


Go Easy Australia Fraud Protection Security

At Go Easy Australia, we have a fraud protection security procedure in place which may occur to any order placed via our website/s.
Having this in place ensures peace of mind and the highest level of security protection for all our customers who shop with GMX Motorbikes.
A notification email will be sent to you, if your order as become part of this fraud protection security procedure.
Please follow the instructions on the email and call us to get your order processed.


Can I still order online if I don't have a credit card?

Yes, you can use a debit card (VISA or MasterCard) or open a PayPal account or pay via Bank Transfer

How do I get a PayPal account?

Visit the PayPal website and sign-up for an account.

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  • Brand: Atomik
  • Product Code: AT-14437
  • Availability: In Stock

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