Razor Dirt Bike Comparison 2023. Big razor dirt bike

Razor Dirt Bike Comparison 2023

If you’re looking to buy an electric dirt bike for your kids in 2023, leading brand Razor have seven different models to choose from. They don’t make it easy to pick the right one! So we’ve done all the research for you with our Razor dirt bike comparison chart below.

We’ll show you all the differences between each bike and how they match up, to help you find the best bike for your child’s age and size.

Razor Dirt Bike Comparison Chart

The Razor dirt bikes below are listed in ascending order of size and top speed, from left to right. After the table we’ll briefly review each bike in the same order, to make comparing them easier.

If you’re on a small screen, swipe across to view the full table or scroll across using the scroll bar below it.

Razor MX125Razor MX350Razor SX350Razor MX400Razor MX500Razor SX500Razor MX650

Shared Features

All these Razor dirt bikes have the following features in common:

  • Sealed lead-acid rechargeable batteries
  • Battery charger is included
  • Authentic motocross frame geometry
  • Shatter-resistant plastic fairings (the plastic trim)
  • Twist grip throttle
  • Folding, metal foot pegs
  • Retractable kickstand
  • Adjustable-angle, riser-style handlebars (except MX125 which has a crossbar reinforced handlebar)
  • Quieter and more environmentally friendly than gas dirt bikes

Reviews By Age

While there are many makes and models on the market, you may get more peace of mind buying from a leading US brand such as Razor which has a good reputation for build quality, durability, warranty and spare parts availability.

In fact Razor started out in 2000 making electric scooters (they’ve sold over 13 million of them!) and they now make a wide range of electric dirt bikes, go karts and ATVs for kids.

For full reviews of each model, check out our electric dirt bike reviews. But here’s a quick summary of the Razor dirt bike range:

Smallest Razor Dirt Bike – for Little Ones

  • Age Guide: 7 (Razor’s guide). 4-8 ( Real world guide)
  • Top Speed: 8 mph
  • Weight Limit: 110 lbs

The MX125 (check price on Walmart) is the smallest Razor dirt bike and is exclusive to Walmart. It has a top speed of just 8 mph and simple on/off single speed so it should be slow and easy enough for little ones to control safely, though parental supervision is a must.

It’s also only half the weight of the next models up (the MX350 range) which makes it easier for small children to handle or pick up off the ground. But we do worry that kids may outgrow it all too soon – the Razor MX350 could provide more years of use for fast growing kids…

  • Usually the cheapest model
  • Good size for 4-8 years old
  • 40 minutes running time
  • Only 6 hours recharge time

Budget Choice for Ages 5-10

  • Age Guide: 13 (Razor’s guide). 5-10 ( Real world guide…)
  • Top Speed: 14 mph
  • Weight Limit: 140 lbs
razor, dirt, bike, comparison, 2023

The Razor MX350 Dirt Rocket (check price on Amazon) is a big seller for kids under 10, with a top speed of 14 mph, powered by a 350W motor. The MX350 is identical to the SX350 and MX400 except for the colors and some small styling variations.

With 12-inch pneumatic knobby tires, this a scaled down version of a classic adult motocross bike. It may take more time to learn to ride than the MX125 but it’s quick, great fun and the weight limit of 140 lbs makes it suitable for kids up to pre-teens so it should provide better value for money over the years.

  • 14 mph top speed
  • Pneumatic knobby tires
  • ‘Proper’ dirt bike twist throttle
  • Good size for kids aged 5-10
  • Spares available from Razor’s website

Best Value Dirt Bike for Kids and Early Teens

  • Age Guide: 14 (Razor’s guide). 8-14 ( Real world guide…)
  • Top Speed:15 mph
  • Weight Limit: 175 lbs

The Razor SX500 Dirt Rocket McGrath (check price on Amazon) and the MX500 Dirt Rocket are almost identical – they both have a more powerful 500W motor giving them a top speed of 15 mph – quite a step up from the models above.

Instead of just a rear brake they have dual disc brakes for better stopping ability and dual suspension (adjustable at rear) to smooth out big bumps off-road. The SX500 is ready for dirt with 10″ Supercross tires (front and rear specific tread) whereas the MX500 has a larger 16″ pneumatic knobby tire at the front and 14″ at the rear.

Crucially, both models also have variable speed so you can increase speed incrementally, whereas the smaller models above only have an on/off single speed which can cause a more jerky start.

Thanks to an extra third battery, you still get 40 minutes of continuous use on these bikes too – good for about 10 miles. The SX500 and MX500 are quick, with good brakes and suspension. The increased weight limit of 175 lbs plus a 4″ higher seat makes them more suitable for older kids and some teens too.

  • 15 mph top speed
  • 40 minutes running time
  • Variable speed
  • Dual disc brakes
  • Dual suspension (adjustable rear)
  • Good size for kids aged 8-14

Ultimate Choice – Best for Older Kids and Teens

  • Age Guide: 16 (Razor’s guide). 10-16 ( Real world guide…)
  • Top Speed: 17 mph
  • Weight Limit: 220 lbs

The Razor MX650 is the fastest Razor dirt bike, thanks to a massive 650W motor. This also helps give it the highest weight limit of 220 lbs – enough to cope with teens and even small adults (check price on Amazon).

Except for the larger motor, the MX650 has exactly the same specifications as the MX500 with variable speed, dual suspension and dual brakes. Despite the extra power you still get 40 minutes of continuous use (about 11 miles of riding) and the charging time remains the same at 12 hours.

The MX650 is the ultimate electric dirt bike in Razor’s range. The higher top speed and weight limit makes it better for use on hills and by older kids, teens and even some adults.

  • 17 mph top speed
  • 40 minutes running time
  • Variable speed
  • Dual disc brakes
  • Dual suspension (adjustable rear)
  • Good size/power for kids aged 10-16

Razor Dirt Bike Sizes

As you can see from the Razor dirt bike comparison chart above, the seven different models can be easily split into 4 suggested age ranges, based on many real life user reviews:

Little Ones Aged 4-8

The Razor MX125 is the smallest, lightest and (by far) the slowest model. This Razor 12v dirt bike has a top speed of just 8 mph and the lowest seat height of 17″ makes it the safest choice for little ones.

Young Kids Aged 5-10

The Razor MX350 / SX350 / MX400 are all the same bike – the only differences are the colors and cosmetic styling. Models in this MX350 range weigh twice as much as the MX125, have a 22% larger frame and a top speed of 14 mph which makes them more suitable for slightly older or larger kids.

Older Kids Aged 8-14

The Razor MX500 / SX500 are the same bike – again, the only differences are the colors and cosmetic styling. They’re bigger, heavier and quicker than the MX350 range above. The frame is 20% larger, weight limit is 35 lbs higher, seat height is 4″ higher and they’re 1 mph quicker.

But they’re not just bigger versions of the MX350 range. They have extra features found on ‘proper’ adult dirt bikes such as dual suspension, dual disc brakes and variable (not single) speed. These features give them a more refined ride than the smaller models and they perform better off road.

Older Kids and Teens Aged 10-16

The Razor MX650 has the same size frame, seat height and weight as the MX500 range above and it also has the same cool features like dual suspension, dual brakes and variable speed.

But it has a more powerful 650W motor that makes it the quickest Razor dirt bike, with a top speed of 17 mph – 2 mph quicker than the MX500 range and with faster acceleration. It also has a much higher weight limit of up to 220 lbs which can cope more easily with teens and even small adults.

Recommended Manufacturer Age Range

Razor make great dirt bikes but they are famous for recommending minimum ages that seem way too low for the actual size of the bike! If parents follow the official Razor dirt bike age range they often end up returning the bike as it turns out to be much smaller than they anticipated…

These are the minimum ages that Razor recommend:

So why do so many buyers find these ages unrealistic? Let’s take the MX350 range as an example – Razor recommend it for those aged 13 whereas real world reviews from many users suggest 5-10 may be more appropriate.

Check out this video of the MX350 with 4 and 7 year old boys riding:

The 4 year old is maybe a little small but the 7 year old is a good size for this bike. But if you followed Razor’s age guide and bought it for a 15 year old – yes, they could probably squeeze onto it but each knee could be splayed out so far they’d be in different zip codes!

For more age related videos and size guides on each bike, see our reviews of the best electric dirt bikes for kids.

Razor Dirt Bike Weight Limit

Always check your child’s weight against the recommended weight limit before making a purchase.

If your child is way too light, they may have difficulty controlling the bike. If they are too heavy, there is an increased chance of the bike toppling over and causing injury – it will also reduce top speed and battery life.

Razor Dirt BikeWeight Limit
Razor MX125 110 lbs
Razor MX350 140 lbs
Razor SX350 140 lbs
Razor MX400 140 lbs
Razor MX500 175 lbs
Razor SX500 175 lbs
Razor MX650 220 lbs

Top Speed of Each Model

Razor electric dirt bikes do not have a parental speed control (governor). They don’t have engine braking either so the bike only slows down gradually if you lift off the throttle and it can coast on hills. Adult supervision is highly recommended, particularly when your child first starts to ride.

Razor dirt bike speed table:

Razor Dirt BikeTop Speed
Razor MX125 8 mph
Razor MX350 14 mph
Razor SX350 14 mph
Razor MX400 14 mph
Razor MX500 15 mph
Razor SX500 15 mph
Razor MX650 17 mph

It is also important that kids learn how to use the brakes properly and have a good feel for stopping distances if they run into difficulty.

For more safety advice and tips, check out our electric dirt bike buying guide.

Razor Dirt Bike Seat Height

For comparison, the seat height on a regular adult size dirt bike is typically at least 34″.

Razor dirt bike seat height table:

Razor Dirt BikeSeat Height
Razor MX125 17″
Razor MX350 20″
Razor SX350 20″
Razor MX400 20″
Razor MX500 24″
Razor SX500 24″
Razor MX650 24″

Battery Life and Recharge Time

All these bikes are fitted with one, two or three 12V sealed lead-acid batteries that can provide 30 to 40 minutes of continuous use, depending on the model (see the Razor dirt bike comparison chart above).

The batteries take up to 12 hours to fully recharge, except on the MX125 which only needs 6 hours because it only has one battery.

How long the battery lasts per full charge depends a lot on how and where you use the bike. If the rider is a light weight and the ground is level and smooth then the battery will last much longer than a heavy rider trying to go full power uphill or over rough terrain.

Razor recommend not storing batteries in temperatures below freezing. You may therefore need to remove the batteries during Winter, depending on your local climate. They also recommend recharging the batteries at least once a month or they may no longer accept a charge.

Conclusion – Razor Dirt Bike Comparison

Razor produce a wide range of electric dirt bikes for kids aged 4 right up to late teens so you’re sure to find a suitable model for your child. But the range is unnecessarily complicated by the fact that some of the ‘different’ models are actually the same bike in a different color! In reality there are only 4 variants to choose from.

For younger kids, the MX350 range is likely to provide better long term value for money (compared to the tiny MX125) as kids grow so fast.

For older kids and teens it’s a tougher choice – the SX500 range is the same size as the more expensive MX650 and has all the same off-road features so is great value. But it is slightly slower and has a lower weight limit – for the ultimate bike we’d choose the MX650 if budget permitted.

Razor MX350 Electric Dirt Bike Review

The Razor MX350 dirt bike is an amazing off-road speed monster that any child will have a blast taking out for a ride. It comes with a sturdy design and quality features that deliver an authentic motocross riding experience.

Your kid won’t stop raving about dirt biking and the fun that it comes with. But you are well aware that he can’t be speeding up and down dirt trails on a gas-powered 50cc at his tender age. So, what do you do to quench his thirst for an outdoor adventure?

How about surprising him with a battery-powered dirt bike!

With this, you’ll be able to ensure that your little prodigy has all the ingredients for exciting off-road biking without necessarily risking his safety. Razor is a brand that quickly comes to mind when you think of personal electric transport.

In this post, we review one of their offerings, the MX350 dirt bike for kids. It’s been touted as one of the best models you can find in the market today for a young bike enthusiast. But how does it stack up against the competition? Keep on reading for more…

Maximum Speed : 14mphMOTOR: 350W high-torque, chain-driven motor FRAME: Steel with authentic dirt bike geometryBRAKE TYPES: Hand-operated rear brakesBATTERY: 24V (two 12V) Lithium-ion sealed lead acidWHEELS: Spoked 12-inches TIRES: Big, pneumatic knobby tires


The Razor MX350 features a formidable steel frame that can comfortably carry riders weighing 140lbs or less. Measuring 44 by 24.5 by 31 inches, this bike has the geometry of an authentic dirt bike. Its 65lbs weight ensures that your kid remains agile in the rugged terrain.

Overall, the bike has an appealing design that is fit for a professional dirt bike rider. Riser handlebars with ergonomic grips and spacious seat help to deliver a sleek and comfortable ride in all kinds of surfaces; your boy’s fun won’t be restricted to the flat pavement alone.

This bike also comes with a retractable kickstand, as well as folding foot pegs, meaning you’ll have an easy time squeezing it into the corner of your garage. Its frame also allows you to pack it in the boot of the car while transporting it.

Ideally, this bike can be utilized by children up to 13 years of age. However, it is best suited for kids aged between 5-7 years, who will have less difficulty maneuvering it and have the bike grow with them as they get older.


The MX350 is equipped with convenient hand-operated rear brakes that help to improve your son’s hand-to-eye coordination. Just like in a push-bike, engaging the brakes only requires squeezing the handlebar lever.

This makes things quite easy for young riders, although there’s an issue when it comes to scaling up the hills. I feel the rear brake could make do with the extra help of a front brake or a disc to deliver a more stable stopping power.


The MX350 uses a 350W motor that will allow your child to achieve a decent maximum speed of 14mph; just enough to get the adrenaline pumping but nothing dangerous.

This chain-driven motor offers a long lifespan but slightly suffers when it comes to torque.Your kid will lose speed rapidly when ascending inclines! Nevertheless, twisting the handlebar throttle will deliver a smooth but limited acceleration.

One thing that stands out from the chain-driven motor is the low sound profile that it provides.

Unlike gas-powered dirt bikes, this electric transporter ensures that your kid won’t be a nuisance in the neighborhood because of the irritating engine noise.


Just like any other electronic toy, the Razor MX350 comes fitted with a 24V battery that is made up of two 12V sealed lead acid rechargeable system. The battery will require 12 hours of continuous charging when you acquire it before your son takes it out on its first run in the dirt.

This battery will offer your boy almost 30 consecutive minutes of unadulterated fun on a full charge, although the exact duration will be determined by the weight of the rider and the speed at which he’s riding. Usually, the faster the bike goes, the less time there will be to ride.

Generally, the battery will require as many as 8-12 hours to completely recharge when it runs out of power. This is one of the few let downs on the MX350; 8 hours of waiting may feel like an eternity for any young rider who has just been bitten by the dirt bike-riding bug.

Your child will enjoy the versatility that this dirt bike offers on all types of surfaces. The ride remains stable and exciting on dirt trails, grass fields, bumpy roads, as well as gravel, allowing him to go anywhere he wants, and as fast as he wants to.

One thing to keep in mind is that the battery on this bike doesn’t come pre-charged. So, you might want to charge it for 12 continuous hours if you want your excited son to start riding it immediately on the following morning.


The MX350 motocross bike consists of spoked wheels on large 12-inch pneumatic knobby tires for maximum power transfer. The tires are well-treaded to result in a stable ride, even on slippery surfaces, to provide your learning biker with the rider confidence he needs.

These can also be filled using a standard bicycle pump, and the fact that they are air-filled means you need not worry too much about pressure.

What Do We Like?

There are many great features on the MX350 that enable it to leave other rival dirt bikes in the dust. First on the list is the rugged design and authentic motocross feel that the bike offers. Your boy will look like a pro in the making on this amazing two-wheeler.

The ride is generally smooth with simple controls that anybody getting their feet wet can master in a short matter of time. Your inexperienced kid will be riding this mini-machine like a pro after a few test sessions.

The bike is compact enough to be carried in the trunk of a car when you need to transport it. This comes in handy when you have to take your child out to local trails for a greater sense of adventure.

This bike has a sturdy frame that enables your child to remain stable and comfortable throughout the ride. The kickstand is a handy addition that becomes useful when your kid has to take a breather in the trail where there’s no designated place to park the bike.

You’ll also appreciate the 90-day warranty period that the manufacturer offers on purchase of the motorbike. This allows you to have the bike exchanged in the rare case that you end up with a faulty product.

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