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Razor Dirt Bike Comparison 2024

If you’re looking to buy an electric dirt bike for your kids in 2024, 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
Razor MX125 Dirt RocketRazor MX350 Dirt RocketRazor SX350 Dirt Rocket McGrathRazor MX400 Dirt RocketRazor MX500 Dirt RocketRazor SX500 Dirt Rocket McGrathRazor MX650 Dirt Rocket
8 mph14 mph14 mph14 mph15 mph15 mph17 mph
110 lbs140 lbs140 lbs140 lbs175 lbs175 lbs220 lbs
Suggested Age Range4-8 *5-10 *5-10 *5-10 *8-14 *8-14 *10-16 *
(2 x 12V)
(2 x 12V)
(2 x 12V)
(3 x 12V)
(3 x 12V)
(3 x 12V)
Ride Time per Full Charge40 minutes30 minutes30 minutes30 minutes40 minutes40 minutes40 minutes
Battery Charge
6 hours12 hours12 hours12 hours12 hours12 hours12 hours
ThrottleSingle speedSingle speedSingle speedSingle speedVariable speedVariable speedVariable speed
BrakesRear drumRear drumRear drumRear drumDual discsDual discsDual discs
SuspensionNoneNoneNoneNoneDual (adjustable rear)Dual (adjustable rear)Dual (adjustable rear)
Seat Height17"20"20"20"24"24"24"
Hand GripsFoamSoft rubberSoft rubberSoft rubberSoft rubberSoft rubberSoft rubber
Tires (pneumatic knobby)12"12"12"12"16" (front)
14" (rear)
10" (front)
10" (rear)
16" (front)
14" (rear)
15 minutes15 minutes15 minutes15 minutes30 minutes30 minutes30 minutes
L x W x H (Inches)
36.4 x 21.4
x 25.1
44 x 24.5
x 31
44 x 24.5
x 31
44 x 24.5
x 31
56 x 24.5
x 36
52 x 24.5
x 36
56 x 24.5
x 36
30 lbs62 lbs62 lbs62 lbs98 lbs96 lbs98 lbs
PriceCheck PriceCheck PriceCheck PriceCheck PriceCheck PriceCheck PriceCheck Price

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:

1. Razor MX125 Dirt Rocket

Smallest Razor Dirt Bike – for Little Ones

Razor MX125
  • Age Guide: 7+ (Razor’s guide). 4-8 (* Real world guide)
  • Top Speed: 8 mph
  • Weight Limit: 110 lbs

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


  • Very small
  • Top speed of 8 mph
  • No coil/shock suspension

Check price at Amazon

2. Razor MX350 / SX350 / MX400 Dirt Rocket

Budget Choice for Ages 5-10

Razor MX350
  • Age Guide: 13+ (Razor’s guide). 5-10 (* Real world guide…)
  • Top Speed: 14 mph
  • Weight Limit: 140 lbs

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


  • Only 30 minutes running time
  • No coil/shock suspension

Check price at Amazon

3. Razor MX500 / SX500 Dirt Rocket

Best Value Dirt Bike for Kids and Early Teens

Razor SX500 Dirt Rocket McGrath
  • Age Guide: 14+ (Razor’s guide). 8-14 (* Real world guide…)
  • Top Speed: 15 mph
  • Weight Limit: 175 lbs

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


  • Weighs 98 pounds – too heavy for very young kids

Check price at Amazon

4. Razor MX650 Dirt Rocket

Ultimate Choice – Best for Older Kids and Teens

Razor MX650 electric dirt bike
  • Age Guide: 16+ (Razor’s guide). 10-16 (* Real world guide…)
  • Top Speed: 17 mph
  • Weight Limit: 220 lbs

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


  • Reassuringly expensive…
  • Weighs 98 pounds – too heavy for very young kids

Check price at Amazon

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:

  • MX125: 7+
  • MX350 / SX350 / MX400: 13+
  • MX500 / SX500: 14+
  • MX650: 16+

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 MX125110 lbs
Razor MX350140 lbs
Razor SX350140 lbs
Razor MX400140 lbs
Razor MX500175 lbs
Razor SX500175 lbs
Razor MX650220 lbs
Electric dirt bike safety

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 MX1258 mph
Razor MX35014 mph
Razor SX35014 mph
Razor MX40014 mph
Razor MX50015 mph
Razor SX50015 mph
Razor MX65017 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.

electric dirt bike helmet

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 MX12517″
Razor MX35020″
Razor SX35020″
Razor MX40020″
Razor MX50024″
Razor SX50024″
Razor MX65024″

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.