How Fast Does 125cc Dirt Bike Go? Best Overview 2023

A 125cc dirt bike is ideal for new riders that are beginning to find an awesome leisure activity. It isn't the fastest, but that does not indicate that it has substandard efficiency. The top speed can vary from one model to another, in addition to various other aspects, such as the condition and skills of the cyclist.

A 125cc motorcycle is a small, lightweight motorcycle made for off-road riding. These bikes are generally single-cylinder and have a low power output, making them suitable for newbies or motorcyclists that desire a smaller sized as well as a lot more maneuverable bike. So, just how fast does 125cc dirt bike go?

This article additionally talks about the aspects that impact its speed, in addition to the important things that you can do to make it much faster!

How Fast Can a 125cc Dirt Bike Go?

The average rate of a 125cc dirt bike ranges from 55 to 65 miles per hr. While some people attempt to place their dirt bikes to address 100 miles per hour, this is not recommended since the bike's engine is tiny as well as can not take care of high speeds for a prolonged amount of time.

125cc is a small engine, and thus, its power is not similar to those that you will discover in its faster rivals. While it is slow, there are a number of efficiency upgrades as well as riding techniques that will let you make it faster.

How Fast Can a 125cc Dirt Bike Go


What Can Affect The Speed of 125cc Dirt Bike?

The running rate of a 125cc dirt bike can be influenced by a selection of aspects, such as the following:

The ordinary top speed of dirt bikes depends upon engine dimension, sprocket gearing, as well as many more. A thorough look at the elements adding to the top speed of dirt bikes, especially those with 125cc engines, is given below.


1. Two-Stroke Vs Four-Stroke

When choosing a dirt bike, one of the most vital factors to consider is the engine. It straight influences the general performance, consisting of speed.

The 2-stroke engine only has two functions-- compression and burning. It hits hard and fast, so it is explosive on the track. While it is a lot more typical in older dirt bikes, if speed is your priority, this can be a better choice as it can get to a maximum speed of 60 mph.

On the other hand, a 4-stroke engine is a little slower, signing up an approximate speed of 50 mph. The tractor and weight of the engine add to it being slow-moving.


2. Dimension Of The Engine

As previously pointed out, all types of dirt bikes have a selection of engine dimensions. This element is crucial for the bike's speed as well as horsepower.

Common dirt bikes with engines ranging from 50 to 140 cubic centimeters of variation. Other versions with 175-to-250-cc engines are readily available from the majority of suppliers, but these are much larger than the conventional motorbike class that defines dirt bikes.

Dirt bikes are designed to get to maximum revolutions per minute (rpm) faster in each gear to equal other sorts of bikes, such as bit bikes. For a 50cc bike, the top speed can range between 15 and also 25 miles per hr when riding in the reduced gears. Nonetheless, the bike can get to speeds of up to 50 miles per hr or even more on longer stretches.

When riding in high gear on 125cc dirt bikes with the supply sprocket gearing, you can expect to reach rates of 70 miles per hour. Consequently, a motorcycle's engine size is considerable in establishing its rate.

Dirt Bike Engine Dimension


3. Load

Comparable to vehicles or various other lorries, the load of a 125cc dirt bike likewise considerably affects its rate. Depending on the version that you choose, the optimum load can vary from 200 to 250 extra pounds.

The load depend not just on the weight of the cyclist but likewise on the cargo and also the parts of the dirt bike. Numerous will certainly have various performance upgrades that can include the weight of the bike, slowing it down.


4. Environmental Conditions

External factors can additionally slow down a 125cc dirt bike. For example, its speed will certainly vary greatly relying on the terrain. The muddier the surface gets, the slower the dirt bike will certainly be. The very same thing additionally takes place when there are numerous twists and turns that you need to be mindful of.

The wind is one more environmental aspect that can make your dirt bike slower. The windier it is, the even more drag there will certainly be, making it harder for the bike to reach its top speed.


5. Gear Gearing

You need to know that smaller front drive sprockets and larger rear sprocket gears can produce base ratio gearing for your dirt bike. Manufacturers are doing this to target a wider range of consumers in today's market.

The base gear ratio is accomplished by just establishing dirt bikes with a gear tailoring mix that can give you will certainly the overall efficiency.

Usually, the standard sprocket tailoring arrangement is generally 14/42. This suggests that the 14-tooth drive sprocket gear is in the front side of your bike while the 42-tooth sprocket gearing is located at the back.

When you use the engine revolutions per minute red line as a baseline, you will realize that the average speed of (for example) a 50cc dirt bike ranges from 22 to 25 miles per hour.

This observation is based entirely on the 15 miles per hour full throttle when you engage the initial equipment.

On the other hand, you might accomplish the 50 miles per hr full throttle when making use of the gear. This informs you that when you apply the same red line criteria to your 125cc dirt bike, the average speed is likely to find to 35 miles per hr. From this info, you can quickly inform that the sprocket gearing on a 125cc dirt bike is just one of the driving forces behind its travel speed.

Dirt Bike Gear Gearing


How To Make Your 125cc Dirt Bike Faster

We don't expect much from a 125cc bike because it's simple as well as usually targeted at beginners. Nonetheless, there are a couple of points you can do to assist it carrying out better, such as the following:


1. Train Your Body

The motorcycle alone is insufficient to go full blast on a track. Your physical problem is equally essential. With this, train your body and be ready for the demands of the ride. The more conditioned you are, the much easier it is to get to the dirt bike's top speed.

To name a few, one of the most important things to learn is the correct position. This will let you locate the perfect equilibrium during your ride. This way, you are not just properly distributing your weight on the bike, yet you are likewise boosting handling.


2. Change The Exhaust

Even if you are physically and psychologically ready for the trip, your bike will certainly not go to its fastest if it has substandard elements. With this, you may wish to think about a couple of performance upgrades, and among the most appealing is the exhaust.

The muffler is an important part of the exhaust system. Take into consideration adding a pipe in a two-stroke engine or a slip-on in a four-stroke engine for step-by-step rate improvements. This muffler upgrade can take just around 15 mins, so it is a simple option even for a beginner.


3. Readjust The Suspension

At the beginning glance, an aftermarket 125cc dirt bike suspension might appear pricey. You'll see that it deserves it as soon as you find out how it can speed things up. Due to the fact that it takes in shock, it will additionally make your bike a lot more comfortable.

A vehicle's control is improved thanks to a better suspension, even in one of the most difficult terrains. Enhanced administration of the bike will enable you to boost its speed. In addition, it improves the bike's overall balance.

Dirt Bike Suspension


4. Change The Low-quality Components

If low-quality components are installed, your bike will constantly run in the slow and sluggish speed range. So, what to do then? You should introduce high-end components into the mix. Low-end and worst-quality parts will only exhaust the dirt bikes.

It is also recommended to add a pipe to your two-stroke engine. Or you should add a slip-on to a 4-stroke engine. In doing so, you will witness an incredible speed improvement process.


5. Keep It Clean

If you do not have much money to spend on aftermarket adjustments, you can still obtain your dirt bike quicker. This can be achieved by cleaning up regularly. Mud as well as dirt build-up on the bike's tires and also other elements can trigger it to lose speed with time.

The dirt bike's elements will certainly wear out faster if they are not effectively kept. Speed is likewise negatively influenced consequently. In addition to cleaning, you might want to change any type of components that are no longer working appropriately.

Preserving the tidiness of your dirt bike additionally requires routine lubrication. Make certain that everything is running efficiently by doing this. Because otherwise, the cycle can become sluggish and unresponsive.

Keep Dirt Bike Clean


How To Safely Ride On A 125cc Dirt Bike?

There are some critical security considerations that you ought to keep in mind. Instead of driving rashly, you must keep your bike speed at the safest and balanced rate variety.

  • Most importantly, keep the speed limit in control.
  • Establish the bike speed according to the road as well as environmental problems. For instance, some roadways have great deals of twists and turns, so control the speed accordingly.
  • Prior to getting a trip, check the dirt bike as well as see if its engine, equipment, brakes, and pedals are functioning penalty.
  • On every ride, placed on headgear as well as knee pads.
  • You must regularly improve your dirt-biking skills. The more you practice as well as come to be skillful, the more secure your riding time will certainly come to be.
  • Stay clear of driving at a rate that you can not handle.

As a beginner, it is recommended to begin sluggishly, and afterward they can progressively advance and also advance to have faster flights.


Fastest 125cc Motorcycles

Motorcycle NameTop Speed
Yamaha MT-12580mph
KTM Duke 12577mph
Yamaha R12575mph
Honda CB125R74mph
Kawasaki Ninja 12574mph
Suzuki GSX-R12572mph
Aprilia RS12570mph



As noted over, a 125cc bike can go as fast as 55 to 60 miles per hour, yet the specifics will certainly depend upon numerous elements. For instance, a two-stroke engine is quicker than a four-stroke engine. The experience of the biker, environmental problems, as well as upgrades on the bike are additionally vital aspects that impact the rate.

While a 125cc motorcycle isn't suggested to race like a beast, there are some things that you can do to make it much faster. For example, you can attempt performance upgrades, such as switching the exhaust and adjusting the suspension.

Average Motorcycles Top Speed? [125cc To 2000cc Motorcycle Chart]

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