Best Razor Dirt Bike Battery Upgrade Options. Razor 12v dirt bike

Best Razor Dirt Bike Battery Upgrade Options

Want a longer Razor dirt bike battery life? It’s better to upgrade the battery than to tweak the controller.

Though not all electric dirt bikes offer easy component upgrades, most kids’ dirt bikes can be upgraded, and it’s not hard to do. On the other hand, Razor dirt bikes need more elbow grease to upgrade.

Scouring the net for compatible batteries is the hard part. But don’t worry, we’ve got your back. Check ’em out here.

Razor Dirt Bike Stock Batteries

How Long Does a Razor Dirt Bike Battery Last?

Here’s how long each Razor dirt bike battery can last:

The first thing you probably noticed is why the MX500 and the MX650 use the same battery type. That’s because–and keep this on a hush–it’s the same bike, just different stickers. Despite what some Razor shops may tell you to get an extra dollar.

Razor Dirt Bike Battery Upgrade Options

Here’s the gist of it. We all like spending more time on the saddle – especially our kids. We can do that with upgraded batteries. Here you can find out which battery upgrades fit your Razor dirt bike model, how much they cost, and if they’re worth it.

Can You Upgrade a Razor Electric Dirt Bike’s Battery?

The short answer is, yes. Upgrading your Razor electric dirt bike’s battery has a number of benefits, including a longer range. The downsides aren’t that bad, and you can ignore them if you want. Those include:


  • Longer operating time–which is what we all love
  • Faster charge time (depending on battery features) lets our kids quickly get back on the saddle after a short break
  • Better heat management, so your battery doesn’t burn out as fast
  • Boosts your motor’s power (based on voltage)


  • Added weight (though for Razor dirt bikes, it’s nearly unnoticeable)
  • Some wires might need to be modified (depending on the battery)

Razor Dirt Bike Batteries: What’s available?

Razor dirt bikes come with a pretty universal battery compartment design so you can pretty much interchange batteries among all of them. Although you might need to modify some components such as the frame or motor to maximize compatibility.

Here’s a table where you can see which battery upgrade goes with which Razor dirt bike:

Razor MX125 Battery Upgrades

What Size Battery Does a Razor MX125 Take?

What Size Battery Does a Razor MX125 Take?

The Razor MX125 takes a tiny battery size, at 3.54″ x 2.76″ x 3.98″, which is half the size of bigger Razor dirt bikes’ stock batteries. That’s like a toddler’s lunch box. This is for a stock bike and components, of course.

How Long Does a Stock Razor MX125 Battery Last?

The stock Razor MX125 battery lasts about 16 minutes, tops. I’m not sure “long” is the right word. I guess it’s about how short the Razor MX125 battery lasts, at about 16 minutes. With a 4-hour charge time, you’re better off getting your kid a pedal bike.

Available Battery Upgrades for the Razor MX125

There are not a lot of battery upgrades compatible with the stock Razor MX125. Unless you totally overhaul your bike (motor, frame, controller), the best you can get is a replacement battery with the same power and capacity but a better power flow. The only option we have below is a 12V 5Ah Razor MX125 replacement battery.

Available Battery Upgrades for the Razor MX125: 12V 5Ah Battery for Razor MX125

The 12V 5Ah is a high performance lead acid battery upgrade for the Razor MX125. It comes in a sealed polymer shell that measures 3.54″ x 2.76″ x 3.98″, which is the Razor MX125’s stock battery size. Although it’s meant to replace the stock battery, it features better power flow that makes it more efficient. Therefore, increasing the bike’s range to 20 minutes. Not much oomph, but an extra five minutes in the saddle wouldn’t hurt.

You can currently get this Razor dirt bike battery upgrade for 42.99 USD. That’s a lot cheaper than getting Razor’s stock battery.

Razor MX350 Battery Upgrade Kit

What Size Battery Does a Razor MX350 Take?

Razor MX350’s stock battery case takes a rectangular 5.94in x 2.56in x 3.72in battery. About the size of your typical high school lunchbox. Or, two MX125 stock batteries stuck together.

How Long Does a Stock Razor MX350 Battery Last?

Razor MX350’s stock battery lasts 30 minutes – nearly double the MX125’s performance. This isn’t a lot of riding time, but it’s fine for first-timers. For anyone else, the battery needs an upgrade.

Available Battery Upgrades for the Razor MX350

In the same way as the MX125, the stock Razor MX350 does not have a higher voltage battery upgrade. You can still get batteries of the same voltage and increased range and power management, as well as lithium batteries with longer life.

Here are the upgrades that work with current Razor MX350 models:

Quite a bit of upgrade from the stock with twice the saddle time. I’d recommend this for starters since it doesn’t cost a lot.

Even better with 50 mins of range boost. Now your kid can have a bit more fun on the bike without having to worry about charging for the next near-hour.

Available Battery Upgrades for the Razor MX350: 12V MX350 Battery Upgrade with Extended Range

BullsPower’s 12V extended range battery upgrade works with the Razor MX350, and the wiring is built right in so you don’t have to solder anything. Made of non-conductive ABS plastic, it resists shock, vibration, chemicals, and heat. This Razor dirt bike battery upgrade boosts your MX350’s runtime from 30 minutes to 40 minutes.

Better yet, it’s available on Amazon for just 37.50 USD.

Available Battery Upgrades for the Razor MX350: Mighty Max 12V Lithium Battery Upgrade

The Mighty Max 12V lithium battery upgrade is a rectangular block of lithium cells that extends the range of your Razor MX350 from a modest 30 minutes to around 50 minutes. This makes the Razor MX350 lithium battery upgrade one of the best available. Made from high-quality components, this battery comes with a battery management system (BMS). Battery management systems offer all kinds of protection, including overcharge and short circuit protection.

Right now, the only place you can get this battery upgrade is from Mighty Max for 44.99 USD.

Razor MX500/MX650 Battery Upgrade Kit

What Size Battery Does a Razor MX500/MX650 Take?

The Razor MX500 and MX650 take the same 3.54″ x 2.76″ x 3.98″ batteries – In spite of the fact that the Razor MX500 and MX650 look much bigger than the MX350 – only 3 of them are connected together. This makes for a higher voltage and more efficient power delivery and range.

How Long Does a Stock Razor MX500/MX650 Battery Last?

The stock Razor MX 500 or MX650 battery lasts about 40 minutes of saddle time due to their triplicate stock batteries. Those are the best numbers you can get from a stock Razor dirt bike. No big deal, but you can always change out the batteries for more range.

Available Battery Upgrades for the Razor MX500/MX650

The Razor MX500 and MX650 actually have a decent number of upgrades available on the market, unlike the MX125 and MX350. The bigger toys always get the attention, right? Let’s look at what we found:

It’s a pretty sweet setup from the stock battery which only gives ~17 mins each. Too bad you’ll have to buy three of these to completely power up the MX500/MX650.

This one is more of a killer deal than the first one since it comes in a set of 3 when you buy it. Don’t have to spend extra to get the same amount of range on your Razor MX500 or MX650.

Just like the first one, you get ~25 mins of extra range for every battery pack, BUT you gotta buy it 3-times to power your Razor. I’d suggest this one as a replacement for every single one of your Razor MX500/650 battery packs.

By far the best that you can get. In addition to the awesome 30-minute range boost, you get this battery in a package of three. Plus, it’s plug and play. No need to modify anything.

Available Battery Upgrades for the Razor MX500/MX650: CASIL 12v 12ah F2 Sealed Lead Acid AGM Rechargeable Deep Cycle Battery

The CASIL 12V 12Ah rechargeable power pack is an SLA deep cycle battery that increases the Razor MX500 and MX650’s range beyond that of the stock batteries. If you’re not familiar with deep cycle batteries, they look a lot like car batteries, but they’re totally different. Deep cycle batteries are lead batteries that can run until they’re 80% discharged or more when they need to be recharged. You can discharge deep-cycle batteries up to 80%, but most manufacturers suggest not going below 45% to keep them going longer.

When installed in triplicate, this Razor dirt bike battery upgrade on the MX500/MX650 raises the range from 40 minutes to 75 minutes. You can get one battery from Amazon at just 27.99 USD, although you’ll need three of them to get the maximum effect.

Available Battery Upgrades for the Razor MX500/MX650: UPG 12V 12Ah Replacement Battery

The UPG 12V 12Ah replacement battery is a sealed lead-acid (SLA) absorbed glass mat (AGM) rechargeable battery with a range of 25 minutes on a Razor dirt bike. You’ll need 3 of these for the Razor MX500 and MX650 to increase their runtime to 70 minutes. What’s great is that you get this battery already charged, sealed, maintenance-free, and ready to install.

You can get 3 Razor dirt bike battery packs for just 89.94. That’s a 15 percent discount from their original 124.99 price.

Available Battery Upgrades for the Razor MX500/MX650: Inovel Power Casil 12V 12Ah F2 Razor Battery

Casil 12V 12Ah F2 Razor Battery from Inovel Power is a low-cost replacement for Razor MX500 and MX650 batteries. Despite not being much of an upgrade, this Razor dirt bike battery pack gives you slightly more range. You can expect a range increase from the stock 40 mins to 50 mins. It’s also maintenance-free, so you don’t have to worry about toxic battery fluids leaking. However, it’s also not repairable.

Luckily, you can easily get new ones from Amazon at a humble 24.99 USD.

Available Battery Upgrades for the Razor MX500/MX650: Power King Razor 36V High Performance Rechargeable Batteries

Here’s the best Razor dirt bike battery upgrade we found for the stock MX500 and MX650 models. Power King 36V high performance rechargeable battery is a sealed lead acid power pack with a built-in battery management system for better performance and longer life. This increases the MX500 and MX650 range from 40 minutes up to 90 minutes-which is the maximum you can get from the stock MX500s and MX650s.

Furthermore, Amazon offers a 3-piece pack of this Power King Razor dirt bike battery upgrade for just 89 USD. It also comes linked together so you won’t have to worry about setting it up. Just plug play.

Now that you know which batteries you want, time to find out how do you change the batteries on a razor dirt bike.

Nick Ylac Gutladera — Lead Writer

Nick got his start by stealing his father’s dirt bike and riding it around the neighbourhood at the tender age of 11. These day’s he’s got a full license, so the cops mostly leave him alone. On weekends, he races pit bikes, enduro bikes, and anything else with a motor. Nick’s been a journalist and professional writer since 2017.

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

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 Electric Dirt Bike Comparison: A Detailed Guide

If you want to ride like Jeremy McGrath, a razor electric dirt bike is a great way to go! Razor electric dirt bikes are the perfect choice for kids who don’t want the hassle of a gas-powered dirt bike.

This guide will help you pick from some of the best dirt bikes out there. Let’s take a close look at some of the most popular choices for picking an electric dirt bike for kids and see what makes each model different.

About Razor Dirt Bikes

MODELSX350 SX500MX125MX350MX400 MX500 MX650

Razor was founded in 2000 by Caltron Calvin. The first Razor products to hit the market were the brand’s iconic Razor scooters, but ride-on vehicles were soon to follow.

Razor is now making waves by creating affordable, but feature-packed, electric dirt bikes for kids. Razor electric dirtbikes give parents-and kids-and environmentally friendly way to ride and help younger riders level up to the much more powerful gas dirt bike.

Each Razor dirt bike comes with different features and capabilities. There are entry-level models perfect for budget-conscious parents and first time riders as well as higher-end dirt bikes that let more experienced kids go offroad longer and with more speed.

How To Choose The Right Razor Electric Dirt Bike

There’s a few big things you want to consider before you buy a Razor electric dirt bike for your kids. The biggest factors we are going to look at are the age of your child, the speed and power of the dirt bike, and budget.

Your child’s age will be the biggest factor to consider when buying an electric dirtbike for them. You might need to buy a larger and more powerful model to accommodate an older child. While they might not be ready for adult bikes, having the right size bike means that they can safely stay in control of the vehicle.

You’ll also want to consider the overall power of the Razor dirt bike. This includes how fast the bike can go and how long your child can ride in between charges. Beginner riders should stick with slower dirt bikes that have a more modest range and increase speed and range as they become more comfortable riding.

The last thing to consider is more for the parents. You have a few budget options when it comes to Razor electric dirtbikes. The good news is, overall Razor offers affordable electric dirt bikes that aren’t going to come in at too much of a hit to your wallet.

Razor Dirt Bikes: SX Series

The Razor SX series is designed in partnership with “King of Supercross” Jeremey McGrath. They feature Mcgrath’s signature dirt bike design as well as authentic dirt bike geometry and features.

These dirt bikes are great for fans of Mcgrath and riders who want something a bit more “official” as they work towards their first adult dirt bike.

Razor SX350 Vs. SX500: Major Differences

There are a few major differences between the Razor SX350 and the SX500.

The SX350 is the lighter model designed for younger riders. It’s got a maximum rider weight of 140 pounds which makes it a solid choice for smaller kids. The SX350 also has a total weight of just over 48 pounds.

The SX500, on the other hand, is designed for children 14 and older. This e-dirt bike can support riders up to 175 pounds. The SX500 also weighs a whopping 95 pounds which might be a bit much for smaller riders to handle. This electric dirt bike has a maximum speed of 15 mph which is only one mph faster than the SX350.

Battery questions are going to be at the top of the list for riders debating between these two bikes. The SX350 has a maximum ride time of 30 minutes inbetween full charges while the SX500 gives 40 minutes of ride time on a full charge.

Both bikes will take a minimum of 12 hours to fully recharge. Howeve, Razor recommends letting them charge for a full 24 hours before taking them out for another ride.

Another major difference between these two dirt bikes is their style. The SX500 is designed to look a little bit more mature than the SX350. The SX500 also has a larger overall frame which is perfect for riders who are a bit taller.

SX350 Dirt Rocket McGrath

The SX350 is inspired by legendary motocross Champion Jeremy McGrath. This is the entry-level model of the electric dirt bikes made by Razor and Mcgrath. However, it’s got enough features to help young riders master the art, and skill, of riding a dirt bike.

The SX350 lets riders reach a top speed of 14 mph and a total riding time of 30 minutes of continuous use. The pneumatic tires also handle mixed terrain fairly well, but might not have enough grip for serious off-road mud and loose gravel on an incline.

Young riders are going to love the twist grip throttle that puts them in direct control over the chain driven motor. The rear brake is also controlled right from the handlebar. Overall, it’s an incredibly accurate scaling of an adult dirt bike for younger riders.

It’s also durable enough to put parents at ease. The fairings are made of shatter resistant plastic and the overall design of the dirt bike includes metal footpegs and high build quality. The adjustable handlebards help kids get the right fit on this mini bike.

SX500 Dirt Rocket McGrath

The SX500 is a dirt bike for older rides. This mini bike has a larger overall frame which can be a bit intimidating for younger riders although kids who are tall for their age could graduate to this electric bike ahead of the recommended age of 14 and up.

A rider of this bike is going to find tons of professional features straight from one of Mcgrath’s own bikes. This electric dirt bike has a retractable kickstand, a dual suspension, and a maximum speed that will tear past any old electric scooter.

The top speed of this electric bike is 15 mph. With this speed, it is perfect for riding trails or even tackling beginner courses. The run time is 40 minutes of continuous use on a single charge. Razor says you can get away with a 12 hour charge. However, you should always opt for a full 24 hours. Waiting a full 24 hours to ride will help to preserve the battery’s long-term usability.

As far as bikes go, this one weighs more than usual. It comes in at just under 100 pounds which is heavy for Razor dirt bikes. Your kids are going to need protective gear when riding at these speeds and with a bike of this weight. Opt for something more than just a helmet and use this as a chance to introduce them to full dirt biking gear.

This bike does have enough features to keep up with its boosted power. The pneumatic knobby tires are larger than the SX350 and are perfect for handling rough terrain.

Razor Dirt Bikes: MX Series

The Razor MX Dirt Rocket line is Razor’s flagship electric dirt bike product range. This covers everything from the MX125. This e-dirt bike line is great for young children all the way to the MX650 which even adults can enjoy!

It’s important to note that the SX350 and the SX500 are rebranded versions of the MX350 and MX500. Essentially, you’re paying a few dollars more for a different style and the Mcgrath branding with the SX series.

Razor MX125, Razor MX350, Razor MX400, Razor MX500, Razor MX650: Major Differences

There are some major differences between each of the Razor MX dirt bikes. This is the premier line of electric dirt bikes from Razor and each model scales up in power, capability, and the age and size of the rider it is for. Let’s take a look at the major differences between each different model of dirt bike.

best, razor, dirt, bike, battery

The first thing we need to talk about is the run time of each of these electric dirt bikes. Every single one of these electric dirt bikes has a maximum continuous use run time of 40 minutes with the exception of one. The MX350 has only a maximum run time of 30 minutes.

Each of these bikes can be recharged in just a 12 hour charge time, but Razor recommends charging them for a full 24 hours to ensure that you protect the battery life.

We should compare the top speed of each of these bikes. The MX125 has a modest 8 mph top speed while the MX350 and MX400 have a 14 mph maximum speed. Things speed up with a 15 mph top speed on the MX500. The MX650 really opens up the speed potential with a 17 mph top speed.

Rider weight is a big factor when comparing these electric dirt bikes. The MX125 is designed for smaller riders and has a max weight of 110 pounds. The MX350 and MX400 share the same max rider weight of 140 pounds.

The next two have higher rider weight limits. The MX500 has a limit of 175 pounds and the MX650 has the highest weight rating of all at 220 pounds.

As you might have guessed, each of these scooters is designed for a different age range. The MX125 is built for the youngest riders at 7 and up. The MX350 and MX400 both have a minimum rider age of 14. The MX500 takes things up a year to 15 years old. The MX650 is built for the most mature riders at 16 and up. This edirt bike is also suitable for some adult rides.

MX125 Dirt Rocket

The MX125 Dirt Rocket is the definition of an ideal entry-level model for electric dirt bikes.

This is built for riders that are 7 years and older and weigh no more than 110 lbs. It’s got a top speed of 8 miles an hour. The pneumatic tires are great for riding on well-maintained park trails and your local sidewalk.

Your kids probably won’t be taking this dirt bike onto any trails or courses, but that’s even better considering that this is for the youngest children who are just getting started riding electric dirt bikes.

MX350 Dirt Rocket

The MX350 Dirt Rocket was built for riders that are 13 years old and older and can handle a maximum rider weight of 140lbs. This electric dirt bike takes things up a notch.

The maximum speed jumps to 14 miles an hour and the knobby tires are great for handling trails, courses, and even muddy terrain. This makes this an ideal dirt bike for riders who are stepping things up from sidewalks to obstacle courses.

The motor has a rear wheel drive train which gives much more control. It also gives lots of power for helping riders navigate more difficult courses.

Razor MX400 Dirt Rocket Bike 12V 7Ah Electric Scooter Replacement Battery

We want you to be 100% satisfied. If for some reason you are not happy, return it to us.

We stock low cost, high quality batteries and here to help ensure you make the right purchase.

Free shipping on orders over 99, including freight.

If our product isn’t performing as it should, don’t hesitate to reach out to our customer service team.

About Electric Scooter Batteries

Power up Your Ride with Reliable Scooter Batteries!

  • AJC Battery only uses brand new lead. Lead impurities can significantly decrease battery performance and lifespan. Our strict manufacturing process eliminates trace impurities and yields high quality, dependable batteries.
  • We strictly adhere to international quality standards to provide customers with excellent products and consistent quality. From the components and raw materials to each batch produced, quality tests and procedures are in place, implemented and maintained.
  • AJC batteries are delivered brand new, charged, sealed, maintenance-free and ready for customers to install and use.

Frequently Asked Questions

All we do is sell replacement batteries, we are very good at that!Manufacturer’s are not able to process smaller orders quickly and efficiently.BatteryClerk specializes in processing any size order accurately and fast.

All AJC Battery orders placed Monday-Friday leave our warehouse the same day if placed before 2PM EST.

If your order is placed Friday after 2PM through Sunday, your order will be shipped out Monday morning.

We stand behind our products with 30-day easy returns and a 12 month warranty. Lawn and tractor batteries have a 6 month warranty.

Please enter the brand and model number of your device or battery you need to replace in the search bar at the top of this page.

As long as the voltage, terminals and dimensions match, then you will be able to use this as a compatible battery replacement option.

Razor MX650 Dirt Bike

The Dirt Rocket MX650 is a high-performance, electric-powered dirt bike that comes equipped with Supercross-inspired styling, a high-torque motor and dual suspension.

Assembled Product Dimensions: 56 x 24.5 x 36

36V (three 12V) sealed lead acid rechargeable battery system

Product decoration and specifications subject to change without notice

LOCAL PICKUP ONLY. Call 972-509-1553 for availability. Professional Assembly Included!

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