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 MX125 | Razor MX350 | Razor SX350 | Razor MX400 | Razor MX500 | Razor SX500 | Razor MX650 | |
---|---|---|---|---|---|---|---|
Top Speed | 8 mph | 14 mph | 14 mph | 14 mph | 15 mph | 15 mph | 17 mph |
Weight Limit | 110 lbs | 140 lbs | 140 lbs | 140 lbs | 175 lbs | 175 lbs | 220 lbs |
Suggested Age Range | 4-8 * | 5-10 * | 5-10 * | 5-10 * | 8-14 * | 8-14 * | 10-16 * |
Battery | 12V | 24V (2 x 12V) | 24V (2 x 12V) | 24V (2 x 12V) | 36V (3 x 12V) | 36V (3 x 12V) | 36V (3 x 12V) |
Ride Time per Full Charge | 40 minutes | 30 minutes | 30 minutes | 30 minutes | 40 minutes | 40 minutes | 40 minutes |
Battery Charge Time | 6 hours | 12 hours | 12 hours | 12 hours | 12 hours | 12 hours | 12 hours |
Motor | 100W | 350W | 350W | 350W | 500W | 500W | 650W |
Throttle | Single speed | Single speed | Single speed | Single speed | Variable speed | Variable speed | Variable speed |
Brakes | Rear drum | Rear drum | Rear drum | Rear drum | Dual discs | Dual discs | Dual discs |
Suspension | None | None | None | None | Dual (adjustable rear) | Dual (adjustable rear) | Dual (adjustable rear) |
Seat Height | 17" | 20" | 20" | 20" | 24" | 24" | 24" |
Hand Grips | Foam | Soft rubber | Soft rubber | Soft rubber | Soft rubber | Soft rubber | Soft rubber |
Tires (pneumatic knobby) | 12" | 12" | 12" | 12" | 16" (front) 14" (rear) | 10" (front) 10" (rear) | 16" (front) 14" (rear) |
Assembly Time | 15 minutes | 15 minutes | 15 minutes | 15 minutes | 30 minutes | 30 minutes | 30 minutes |
Dimensions 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 |
Bike Weight | 30 lbs | 62 lbs | 62 lbs | 62 lbs | 98 lbs | 96 lbs | 98 lbs |
Price | Check Price | Check Price | Check Price | Check Price | Check Price | Check Price | Check 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
- Age Guide: 7+ (Razor’s guide). 4-8 (* Real world guide)
- Top Speed: 8 mph
- Weight Limit: 110 lbs
The MX125 (check price at Amazon) 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…
Pros:
- Usually the cheapest model
- Good size for 4-8 years old
- 40 minutes running time
- Only 6 hours recharge time
Cons:
- Very small
- Top speed of 8 mph
- No coil/shock suspension
2. Razor MX350 / SX350 / MX400 Dirt Rocket
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 at 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.
Pros:
- 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
Cons:
- Only 30 minutes running time
- No coil/shock suspension
3. Razor MX500 / SX500 Dirt Rocket
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 at 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.
Pros:
- 15 mph top speed
- 40 minutes running time
- Variable speed
- Dual disc brakes
- Dual suspension (adjustable rear)
- Good size for kids aged 8-14
Cons:
- Weighs 98 pounds – too heavy for very young kids
4. Razor MX650 Dirt Rocket
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 at 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.
Pros:
- 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
Cons:
- Reassuringly expensive…
- Weighs 98 pounds – too heavy for very young kids
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 Bike | Weight 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 Bike | Top 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 Bike | Seat 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 MX500 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.