How Fast Are These “Kid” Dirt Bikes? (50cc – 125cc)

Looking for a new (at least to you) dirt bike? Or, perhaps, you’ve already got one and just curious how fast it goes? Okay, I’ll stop guessing. The following are solid estimates (user experience as well as factory specs) of how fast certain dirt bikes are. We’ll cover 50 cc through 125 cc bikes. A simple answer would be that an average dirt bike rides at between 50 to 60 miles per hour, but these “how fast” numbers are going to be different depending on the bike.

Still, this can be affected by a variety of factors such as the terrain, rider’s experience, and the type of engine. To help you understand the speed of a dirt bike, I’ve prepared a review of the beginner-friendly “kid” dirt bike types and approximated speeds. Have “fun.”

How Fast Does a 50 cc Dirt Bike Go?

Depending on the type and size of the bike, trail dirt bikes have maximum speeds ranging from 25 to 40 miles per hour. Mini trail motorcycles with low seat heights, like the Yamaha PW50, have a speed range of 20 to 28 mph, making them ideal for young children.

On the plus side, it is permitted to ride on the street and is safe to do so in the area. Beginner riders prefer 50 cc trail dirt motorcycles since they have adjustable speed restrictions that allow kids to get used to riding dirt bikes safely. There are both gas-powered, and electric dirt bike options for the kiddos.

Dirt bike specifications, such as engine type and pinion gear changes, can affect motorcycle performance and speed.

Two-stroke engines are often significantly faster and lighter than four-stroke engines, making them suitable for motocross racing on dirt bikes. On the other hand, four-stroke dirt bikes have a wide power range, few shifts, and are easy to handle even for beginners. The gear ratio is another factor that affects speed. You can increase the performance and average speed of your dirt bike by adjusting the pinion ratio.

Looking for the best dirt bike for your kid? Check out this article: What Are the Best Dirt Bikes for Kids & Teenagers?

How Fast Is a 60 cc Dirt Bike?

The first thing that you will need to consider is the model of the dirt bike that you are riding. Apart from that, there is a wide variety of other factors. Dirt bikes that run on a 60 cc engine average from 25 to 45 miles per hour.

To have a more realistic approximation, you would need to consider weather conditions, the terrain, as well as the load that you are putting on the bike. It is safe to say that bikes in the category of 60 cc are mostly for casual racing with certain models such as those reaching 45 mph being adequate for competitive racing.

How to Make a 60 cc Dirt Bike Go Faster? The first thing that you can do is ensure that the surface you are riding on is smooth. The second thing is to put as little load as possible. Last but certainly not least is riding in clear weather.

How Fast is a 70 cc Dirt Bike?

Similar to a 50 cc or a 60 cc dirt bike, riding a 70 cc is an ideal choice for anyone who is just starting. According to dirt bike specialists, a 70 cc averages between 35 and 45 miles per hour. While it can go as fast as 60 miles per hour, it would require a strenuous amount of effort as the 70 cc engine does have physical limitations.

For example, you need to generate anywhere from 3 to 5 additional horsepower to go 10 miles per hour faster when riding a 70 cc dirt bike. It is something that most beginners, and even more experienced riders, won’t be able to do without putting their bodies under huge amounts of pressure.

As mentioned above, the lighter the load, the faster your bike will go. In addition to that, the type of the tires (whether these are suitable for the terrain you are riding on), as well as the engine that your bike operates on, are important factors. Thus, you will find that two-stroke engines are trickier to control but produce more speed than four-stroke engines.

How Fast is an 80 cc Dirt Bike?

An 80 cc dirt bike has a top speed of around 50-55 mph. However, 80 cc off-road speed may vary depending on the rider’s weight and whether the bike is two or four-stroke. The two-stroke engine is the faster option.

Generally speaking, the lighter the rider, the faster they move. While it is geared towards kids, adults love it too. Many adults buy for themselves, not just for their children. Although, I’d recommend a gas-powered option if buying for yourself. Think big-brand like Honda, Yamaha, etc.

These bikes are not designed for long trips at full speed. Needless to say, high speeds can tire motorcycle engines and cause serious wear and tear. The dirt bike is built for jumping and balancing on rough terrain. In general, the goal is not to ride as fast as possible but to have fun and experience new challenges.

How Fast is a 100 cc Dirt Bike?

A 100 cc dirt bike has a top speed of 65 miles per hour. If you do not follow the prescribed standards when riding a bike, you are putting yourself in grave danger. A 100 cc dirt bike, on the other hand, is appropriate for novices and will assist riders to gain a fundamental understanding of dirt motorcycles.

Who is a 100 cc Dirt Bike for? While most companies advertise that 100 cc dirt bikes are for kids we found that a good bunch of these vehicles are great for adult use as well… think pit bike or just cruising around the property. They are fun and convenient.

NOTE: If you’re looking for a good beginner dirt bike for adults, check out this article: Best Beginner Dirt Bike for Adults (Motocross and Trail Riding)

How Fast is a 110 cc Dirt Bike?

A 110 cc motorcycle can reach speeds of 50 to 65 miles per hour. It’s pretty fast. Also, these dirt bikes can keep up pace of adults on group rides while remaining small and agile enough for younger riders to handle.

Ideal for Growing Riders. The 110 cc dirt bike is the perfect choice if your kid is gaining more experience with riding dirt bikes or you are someone who has been riding a 60/70 cc dirt bike for a few months and wants to take it up a notch.

How Fast Does a 125 cc Dirt Bike Go?

Depending on the terrain, this type of bike can reach an average speed of 60 to 70 miles per hour. While riding downhill you can reach speeds over 70 mph, but the manufacturers of these bikes advise riders not to exceed their average top speed for safety reasons.

The majority of dirt motorcycles with a 125 cc engine have horsepower ranging from 5.9 to 7.8 at a stunning 7500 revolutions per minute (rpm). These bikes use single-cylinder four-stroke engines, which are the most common type of engine available.

What Can Affect the Speed of a Bike?

A wide variety of factors affects speed. First, and foremost, it is the type of engine. As discussed throughout the article, a two-stroke engine dirt bike is always faster than a four-stroke engine. In addition to that, the load, tire size, as well as the terrain that you ride on (the smoother, the faster) all play an important role in determining the speed of a dirt bike.