How Fast Dirt Bikes Go (Research Paper Sample)

How Fast Do Dirt Bikes Go? (Quick Answers!)
Speed is everything for dirt bikes, but so is safety. We all want to go fast on these motored speed beasts and remain safe. So, how fast do dirt bikes go?
Mini dirt bikes, primarily kids' 50cc dirt bikes, average 25-50mph. However, the average adult dirt bike, with an engine capacity of about 100cc-200cc, can hit 50-70mph under perfect conditions.
Remember, we are talking about perfect conditions, where there are no legal restrictions, and where the terrain and the weather are favorable. We are also talking of a situation where the rider is skilled and confident enough to hit top speed.
But as you'll later learn, some dirt bikes are just as fast as motocross motorcycles. Interestingly, some of them can hit 80-100mph, which is often the case with dirt bikes with a 400cc plus engine.
Below is a table summary showing the potential top speed of the various dirt bike engine capacities.
Engine Size

Potential Top Speed

50cc

25-40mph

70cc

40-45mph

85cc

45-50mph

100cc

50-55mph

110cc

50-60mph

125cc

55-60mph

150cc

55-60mph

200cc

60-70mph

250cc

70-85mph

400cc

80-87mph

450cc

80-90mph

500cc

90-100mph

1000cc

Up to 188mph

How Fast Does the Average Dirt Bike Go?
The average kids' dirt bike, primarily a 50cc dirt bike, can hit a top speed of 25-40mph under perfect dirt racing conditions. On the other hand, the average beginner adult 125cc dirt bike can hit 55-60mph.
Note that the conditions must be favorable for fast dirt biking for you to realize these top speeds. That includes desirable weather and a perfect road.
How Fast Do Street Legal Dirt Bikes Go?
Street legal dirt bikes are not expected to go too fast. So, they average 5-25mph on high-traffic roads. However, on highways, you can hit over 40mph with a street-legal dirt bike with a 100cc plus capacity.
Overall, the conditions must be favorable to ride a street-legal bike too fast. You must also be confident to control it at such a high speed.
How Fast Does the Fastest Dirt Bike Go?
The fastest dirt bike, the KTM 450 SX-F, can hit a top speed of 123mph on a perfect road. Essentially, that's owing to its lighter build (237 pounds), powerful battery, and impressive 4-stroke engine.
Coming second and third are Aprilia RXV 5.5 and Beta 450Rs, which can hit a top speed of 113mph and 110.9mph, respectively.
Other fast dirt bikes include ATK Intimidator (110mph) and BMW G650 X Challenge (104mph)
What's The Fastest Dirt Bike You Can Buy?
Generally, here is a top 10 list of the fastest dirt bikes on the market today:
1 KTM 450 SX-F (123mph)
2 Aprilia RXV 5.5 (113mph)
3 Beta 450Rs (110.9mph)
4 ATK Intimidator (110mph)
5 BMW G650 X Challenge (104mph)
6 Muz Baghira (102mph)
7 Husqvarna FE501S (101.5mph)
8 Kawasaki KLR650 (98mph)
9 Honda XR650L (98mph)
10 Suzuki DR-Z400Sm (94mph)
Can Dirt Bikes Be Street Legal?
Yes, dirt bikes can be street legal if they have functional side mirrors, horns, brake lights, taillights, headlights, and exhaust. Usually, standard dirt bikes don't come with these add-ons, making them not street legal.
The good thing about these add-ons is that you can buy and fix them on the dirt bike. It’s important, nonetheless, that they are DoT-certified.
How Fast Do Mini Dirt Bikes Go?
Mini dirt bikes usually come with a smaller engine capacity, about 50cc, which can hit a top speed of 25-40mph, depending on the terrain, rider's experience, and dirt bike brand.
Overall, mini dirt bikes are kids' dirt bikes, and they favor kids under five years more. So, we cannot expect them to be too fast.
That is the case with the SPX Moto Kids Mini Dirt Bike (View on Amazon), which ordinarily has a 30mph top speed, but kids are likely to run under 15mph to ride safely.
Speed According to CC
How Fast Do 50cc Dirt Bikes Go?
Most 50cc dirt bikes can go at a maximum speed of 25-40mph under desirable weather and road conditions. Note, however, that 50cc engines are small-capacity engines, so you cannot expect the dirt bikes to go faster.
Furthermore, these dirt bikes are kids' dirt bikes, which means they run slowly. Most of them are even toy dirt bikes, which means they are only good for your kid to play with.
How Fast Does 70cc Dirt Bike Go?
You can expect a 70cc dirt bike to go slightly faster than a 50cc dirt. In that case, while a 50cc dirt bike can clock 25-40mph, a 70cc dirt bike can hit 40-45mph.
But just like 50cc dirt bikes, 70cc dirt bikes are kids' dirt bikes, but they suit older kids better. And unlike 50cc dirt bikes, 70cc dirt bikes can take on the streets.
Note, however, that one cannot go too fast with a 70cc dirt bike on the streets. So you are more likely to run under 15mph.
How Fast Can A 85cc Dirt Bike Go?
Under favorable conditions, an 85cc dirt bike can clock a maximum speed of 45-50mph, mainly depending on the brand. A Kawasaki K85, for example, can easily hit 50mph, but most of the 85cc dirt bikes average 45mph top speed under perfect conditions.
In addition to the brand, the top speed of 85cc dirt bikes depends on the engine stroke, rider experience, terrain, and weather. The more experienced you are and the more favorable the riding conditions are, the faster you are likely to go.
How Fast Do 100cc Dirt Bikes Go?
Depending on the engine stroke and the racing condition, a 100cc dirt bike can reach a top speed of 50-55mph. Overall, expect to go much faster with a 2-stroke 100cc dirt bike than a 4-stroke 100cc as the former is lighter and picks up speed much faster.
How Fast Do 110cc Dirt Bikes Go?
The dissimilarity between a 100cc and 110cc dirt bike is 10cc. So, there isn't a big difference in their top speed. However, you can expect to hit a top speed of 50-60mph when the road conditions are favorable.
But still, a 2-stroke 110cc dirt bike goes much faster as it's lighter than a 4-stroke. Moreover, the more experienced you are, the likelier you can hit top speed faster.
How Fast Do 125cc Dirt Bikes Go?
Most 125cc dirt bikes can hit 55-60mph when the conditions are favorable, and a few others register up to 75mph. In most cases, those dirt bikes that can clock up to 75mph are usually 2-stroke engines that are lightweight and generally pick up speed much faster.
However, those that clock 55mph are often four-stroke, as is the case of the Apollo DB X-18 (View on Amazon).
How Fast Does A 150cc Dirt Bike Go in Mph?
Most high-end 150ccc dirt bikes can clock 55-60mph under favorable terrain and weather. More importantly, it depends on how confident you are riding too fast. If you are not confident enough or when the road conditions are unfavorable, you will likely go under 25mph.
How Fast Do 250cc Dirt Bikes Go?
250cc dirt bikes are fast dirt bikes. So, you can expect them to hit 70-85mph top speed, depending on the engine stroke, rider experience, and road conditions.
In that case, expect a more experienced rider to hit the top speed faster with a 2-stroke 250cc dirt bike than a 4-stroke option as long as the road conditions are favorable.
How Fast Do 450cc Dirt Bikes Go?
450 dirt bikes are mighty little machines that are pretty agile. As a result, these bikes can go a top speed of 80-90mph when the cycling conditions are favorable, and the cyclist is more experienced and confident.
And when it comes to the engine stroke, 2-stroke 450cc dirt bikes are pretty fast. One exception is the KTM 450 SX-F, which can clock 123mph, making it the quickest dirt bike globally.
Speed According to Mode of Operation
How Fast Do Electric Dirt Bikes Go?
Electric dirt bikes come with many speed restrictions, so they don't go as fast as gas-powered options. On average, most of them can hit a top speed of 12-22mph on a perfect road.
Often, most electric bikes are kids' bikes, which means they are naturally slower to keep the younger ones safer.
How Fast Does a Gas Dirt Bike Go?
Kids' gas dirt bikes mostly go at a top speed of 25-40mph, primarily 50cc options. Note, however, that gas dirt bikes with an engine capacity of 100cc and above can double the speed.
For example, 100cc gas dirt bikes can hit 50-55mph, while 150cc options can attain a top speed of 55-60mph under favorable road conditions.
Speed According to Brand
How Fast Do Razor Dirt Bikes Go?
Razor dirt bikes, primarily kids' dirt bikes, average a top speed of 12-22mph. However, a few teens' options fall within the range. One perfect example is the Razor MX500 (View on Amazon), which can clock at a top speed of 14mph.
How Fast Does a Crf150r Dirt Bike Go?
A CRF150R top speed is about 60mph, achievable under perfect cond...