How fast does a 125cc dirt bike go? If you have this type of bike or are interested in getting one, keep in mind that a 125cc motorcycle has an average speed of around 55 to 60mph. Additionally, 10 to 15 horsepower is a 125cc engine’s HP.
However, there are factors that will influence the dirt bike’s speed. You may also increase its average speed by upgrading your dirt bike or working on your skills.
Continue reading below to know more!
Table of Contents
- How Fast is a 125cc Dirt Bike?
- Speed of 2-stroke and 4-stroke 125cc Dirt Bike
- Factors That Affect a 125cc Dirt Bike’s Speed
- Tips to Increase a 125cc Dirt Bike’s Average Speed
- Things to Consider When Going the Maximum Speed
How Fast is a 125cc Dirt Bike?
Although the average speed of a 125cc dirt bike is only around 55 to 60mph, it can go as fast as approximately 70-80mph. In km, it’s 112.7 to 128.5 per hour. If you are an experienced rider, you can reach the maximum speed in an hour.
However, the speed of different 125cc bikes may vary depending on their model. For instance, a Yamaha 125cc top speed (specifically YZF R125) is around 75mph while a CRF125F’s top speed is about 50-55mph.
You can take a look at the chart below for more examples:
|Dirt Bike||Top Speed|
|Husqvarna TC-125 Bike||70 mph|
|Kawasaki KLX 12||45 mph|
|Yamaha YZ125X||60 mph|
|KTM 125 SX||85 mph|
|Suzuki DR-Z125L||45 mph|
Speed of 2-stroke and 4-stroke 125cc Dirt Bike
Depending on the model you have, 2-stroke 125cc dirt bikes are designed to generally be a bit faster than 4-stroke ones. The max speed of a 2-stroke motorcycle is around 70 mph, while it is only 35 to 55 mph for 4-stroke 12cc motorcycles.
In addition, 2-stroke dirt bikes can reach their top speed faster (i.e., in under 5 seconds) than 4-stroke dirt bikes in general.
Factors That Affect a 125cc Dirt Bike’s Speed
How fast or slow your 125cc dirt bike is will depend on a lot of factors. I listed some examples below.
1. Stroke types: Four-Stroke vs. Two-Stroke
The type of stroke your bike has can impact its performance. For instance, a 125cc 2-stroke dirt bike is often faster than a 125cc 4-stroke dirt bike.
You may watch this video to see how fast a 125cc 2-stroke dirt bike can go.
2. Engine size
Your engine size or cc (cubic centimeters) determines the power and size of your dirt bike’s engine. Thus, different sizes have various maximum speeds. The rule of thumb is that the higher the cc is, the faster your motorcycle is.
A 50cc dirt bike has an average speed of 25-40mph, while a 250cc dirt bike can go as fast as 80mph.
Take a look at the chart below for the average speeds for different engine sizes.
|Engine Size||Average Speed|
|200cc||60 mph (approx.)|
|400cc||87 mph (approx.)|
|450cc||90 mph (approx.)|
If you have lightweight and quality tires, you can reach higher speeds. In contrast, if you have bulky tires, your dirt bike will run much slower because your dirt bike is heavier.
Modifications are critical to how fast or slow your dirt bike can go. If your 125cc motorcycle is highly modified, it’s more likely to have more speed than regular 125cc bikes.
By upgrading your sprocket, you can increase its speed due to improved torque acceleration.
Another example is replacing your exhaust pipe. Adding a pipe to a 2-stroke dirt bike can allow your dirt bike to increase its speed.
5. Fuel type
Depending on the type of fuel that suits your engine, such as 87-Octane, 90+ Octane, and 85 Octane, your fuel will impact the speed of the bike. For instance, choosing high-quality fuel will make it run much faster.
Environmental factors will affect your dirt bike’s speed. FIY, riding your motorcycle on a wet road with no traction will not allow your bike to pick up much speed.
Thus, it’s important to assess your environment first if you plan to go faster or reach your dirt bike’s maximum speed.
Tips to Increase a 125cc Dirt Bike’s Average Speed
The top speed of a 125cc dirt bike that was ever recorded was around 100mph. If you want to reach the same speed or at least increase how fast you go with the same bike, here are some tips to help you.
1. Become fitter
A rider’s weight can influence the speed of their dirt bike. Thus, to increase the bike speed, it’s recommended to work on your physical fitness.
2. Upgrade exhaust
You can cover much more distance if you replace or upgrade the exhaust of your dirt bike. It will become more lightweight by improving the air circulation of your motorcycle, thus allowing it to go faster.
3. Modify suspension
Aside from allowing you to have a much more comfortable ride on terrains, adjusting your suspension will improve the average speed. The reason is that you can better manage your motorcycle, allowing you to have a smoother and faster ride.
4. Improve skills
Even if your dirt bike has the right modifications to go faster, you cannot increase your speed if you don’t know how to handle your dirt bike.
As such, to improve the average speed of a 125cc motorcycle, it’s best if you practice more to become more comfortable riding your bike. As you become an expert in riding your dirt bike, you can drive it faster while being safe as well.
5. Avoid having a full tank
As having a full tank will make your motorcycle heavier, try to avoid a full-fueled tank to make your dirt bike less heavy. This way, not only will it allow more speed, but it’ll also make your bike more stable.
Things to Consider When Going the Maximum Speed
Driving at high speed feels exhilarating, but your safety should always be a priority.
Thus, always wear complete gear and appropriate clothing to avoid injuries. Also, take into consideration the capacity of your engine and your skills as a rider to avoid any accident or damaging your motorcycle.
In addition, you need to thoroughly check your dirt bike before going on a ride and assess your environment to avoid injuries or even death.
What is the cost of a 125cc dirt bike?
This type of bike usually costs around 3,000 to 8,000 dollars. Please check the chart below for examples.
|KTM 125 SX||$7,399|
Is a 125cc dirt bike good for beginners?
First off, please keep in mind that 55 to 60 miles per hour is 125cc’s average speed. Thus, it can be too big and powerful for a kid who has no prior experience riding a motorcycle.
However, if you’re an adult who’s starting to get into dirt bikes, this bike engine would work for you.
Who should ride a 125cc dirt bike?
These bikes are for people who are between 5 foot 5 to 5 foot 11. Generally, if you’re a kid with prior experience (ideally with experience riding 80cc dirt bikes), it is ideal if you want to upgrade.
In addition, if you’re an adult who wants to learn to ride a dirt bike, a 125cc motorcycle will provide you with great performance and test your skills.
How to convert 125cc to horsepower?
To easily convert 125cc to horsepower, you may check this online calculator. 125cc in HP is approximately 10 to 15 HP.
The answer to your question, “How fast does a 125cc dirt bike go”, is 55 to 60mph. Given your dirt bike’s capacity, the top speed of a 125cc motorcycle can reach around 70-80mph. In addition, you can expect around 10-15 HP for 125cc horsepower.
Lastly, keep in mind that there are factors that affect the average speed of a dirt bike, such as its engine, tires, certain modifications, and fuel. If you’re interested in increasing its average speed, you may work on your physical health, upgrade your exhaust, modify your suspension, and improve your skills as a rider.
5/5 - (2 votes)
The highest speed for 125cc dirt bikes ever recorded is 100 MPH. Nevertheless, do not expect such a huge number of regular riders; very few have mastered dirt riding skills! As a result, the top speed on most 125cc models fluctuates from 55 to 60 MPH (about 57,5 MPH on average).What speed can a 125cc bike do? ›
The average 125cc bike will likely have a top speed of around 70mph, and should be able to cruise along at 50 to 60mph quite comfortably.How powerful is a 125cc dirt bike? ›
How Much Horsepower Does a 125cc Have? Some Dirt Bikes with an engine capacity of 125cc tend to have horsepower ranging between 33hp and 36hp, with revolutions per minute (rpm) of around 13,000.What is the top speed of a 125cc 2 stroke? ›
The max speed of a 125cc dirt bike is typically between 55 and 60 mph. Since most riders haven't mastered the art of dirt riding yet, they won't reach these maximum speeds. At least one other person will be racing at a top speed of 100 mph.Can you make 125 faster? ›
There are different ways to improve the performance of a 125cc 4-stroke motorcycle. The most common would be to increase the cubic capacity of the bike by changing the cylinder, piston and cylinder head, but, besides being a very expensive modification, we would be outside the law.Can 125cc go on highway? ›
The law in California states that any motorcycle with 150cc displacement or more is legal to ride with a motorcycle license endorsement on the freeways.What dirt bike goes 60 mph? ›
125cc 4 Stroke – 60mph
A 125cc 4-stroke dirt bike can go very fast. It is capable of going up to 60 miles per hour and has a horsepower of about 9.
|Child Age||Child Height||Engine Size In CC|
|3 – 7-years||2ft 7-inches To 3ft 7-inches||50cc|
|7 – 12-years||3ft 7-inches To 4ft 7-inches||50cc – 110cc|
|12 – 14-years||5ft To 5ft 2-inches||125cc|
|14 – 16-years||5ft 2-inches To 5ft 8-inches||125cc – 250cc|
Reaching a maximum speed of 110mph, the Beta 450RS is high on the list of the fastest motocross bikes. The Beta 450RS takes just over 5 seconds to gain 60mph is street-legal in America's 50 states.Can a 125cc go 100 mph? ›
The highest speed for 125cc dirt bikes ever recorded is 100 MPH. Nevertheless, do not expect such a huge number of regular riders; very few have mastered dirt riding skills! As a result, the top speed on most 125cc models fluctuates from 55 to 60 MPH (about 57,5 MPH on average).
There are twice as many power strokes in a single stroke engine when compared to a 4-stroke engine. The two-stroke engines are quicker to accelerate because they can complete their combustion cycle in almost half the time when compared to a four-stroke engine.How fast does a 1000cc dirt bike go? ›
With a 1000cc engine producing upwards of 170 hp, this bike can reach a top speed of 185 mph and complete its 0-60 mph in just under three seconds. The bike also comes with an 8-level traction system to allow riders to achieve such speeds with comfort and control.Can you turbo a 125cc motorbike? ›
YOU can SUPERCHARGE your 50cc and 125cc motorcycles. NCI's kit increases airflow and improves POWER.How can I increase my bike top speed? ›
To increase top speed, you should reduce size of rear sprocket or increase size of front sprocket. Before you decide to increase top speed of the bike, know whether your bike's engine is capable of generating sufficient torque to make use of the taller gearing.Is a 125cc motorcycle powerful? ›
Having a 125cc street bike may not have much horsepower, but with a clutch and gearbox, you have more control over what you have. You have much more control of your bike which can translate into getting out of someone's way faster or merging into traffic more confidently than you would with a much stronger bike.Do 125cc bikes have gears? ›
Other styles of 125cc motorcycles tend to be geared, with a traditional five or six speed manual gearbox. As a result, geared bikes can be a little bit quicker than scoots, even if they are trickier to ride, and they provide great experience for riders looking to continue their career on bigger motorbikes.How fast is 250cc? ›
Most 250cc motorbikes have a max velocity of roughly 80 mph, which is suitable for riders with small stature or inexperience and won't overwhelm them. These bikes have enough power to move around and complete the necessary tasks but not enough to induce a novice rider to accelerate quickly or attain high speeds.How fast do 125cc bikes accelerate? ›
The short answer is that the top speed of a 125cc, on average, is somewhere between 65mph and 80mph. However, to answer the question properly, we need to look at the factors that affect how fast a motorcycle can go and then we will give a short round-up of some of the fastest 125s on the market.How much cc is enough? ›
Best bike engines lie in the range of up to 100 CC and it is generally observed that the engines which range between 110 CC to 150 CC offer a good mileage. Whereas the moderate mileage figures range from the engine capacity of 150cc-200cc.Can I ride a 125cc? ›
You need to be at least the age of 17
One thing that many don't know is that you have an age limit as to when you can ride a 125cc moped. At the age of 16, you are limited to the 50cc level of moped no matter what license you actually hold. This is your limit, so please don't try and break the rules on this.
The size of your motorcycle engine affects not only speed and power but also the weight of the bike. You can get anything from a 125cc (cubic centimeter) engine to something more than 2,000cc.Can you run 50 to 1 in a dirt bike? ›
What is the best ratio for motocross? If you stick to high-quality lubricants, MXA recommends anywhere between 24:1 and 32:1 ratios for 125 and under bikes. You can run 32:1 to 50:1 ratios in your 250 and Open engines.Is 100 hours a lot for a dirt bike? ›
If you're a dirt bike enthusiast who casually drives the motorcycle from time to time, 100 hours is considered high hours. But, of course, this still depends on many factors like maintenance and use. On the other hand, for professional motocross racers, the high hours could vary from 15 hours to 25 hours.Are 4 stroke dirt bikes faster? ›
4-stroke bikes are heavier, have more stability and traction on the track, but have the higher horsepower for overall power. This means that both are fast.How much horsepower is 125cc? ›
These bikes tend to be extremely popular with first-time riders. They give you plenty of power without weighing you down on the road. Expect to get anywhere from 10 to 15 HP out of these bikes.
|Riders (feet/age)||Engine capacity (cubic centimeters)|
|10-12 yrs old||110 or 125|
|5'8”||125 or 150|
A 125cc two-stroke or a 250cc four-stroke is great for a beginner; riders who weigh less than 150 pounds can handle bikes under 250cc, while larger riders will need the suspension found in 250cc models.What is a dirt bike with street tires called? ›
Supermoto as a racing style is a cross between a motocrosser, dirt track bike and road racing single. A dirt bike featuring street tires is commonly called a sportsman setup and is closer to being a supermoto bike.What is the fastest dirt bike ever made? ›
- Husqvarna FE 501 S – 101 mph, 510.9 cc Engine. ...
- MuZ Baghira – 102 mph, 660 cc Engine. ...
- BMW G650 XChallenge – 104 mph, 652 cc Engine. ...
- ATK Intimidator 700 – 110 mph, 685 cc Engine. ...
- Honda XR – 110 mph, 650 cc Engine. ...
- Beta 450 RS – 111 mph, 449 cc Engine.
If you have a provisional motorcycle licence, you must satisfactorily complete a Compulsory Basic Training (CBT) course. You can then ride unaccompanied on the public road a motorcycle up to 125 cc with a power output not exceeding 11 kW, with L plates, for up to two years. To ride a moped, learners must: be 16 or over.
It can carry a weight of around 150 kg easily.How long does a 125cc last? ›
Re: Life span in milage of a Honda 125cc
18,000-30,000 miles is the target for me when I buy second hand.
Because 2-stroke engines are designed to run at a higher RPM, they also tend to wear out faster; a 4-stroke engine is generally more durable. That being said, 2-stroke engines are more powerful.Do 2-strokes or 4-strokes last longer? ›
Both engine types have their pros and cons, and the one that will work best for you depends on the needs of your application. While 4-stroke engines perform well and generally last longer than 2-stroke engines, 2-stroke engines are lighter and faster than 4-stroke engines.Why are 2-strokes so loud? ›
In simple terms a two-stroke engine fires at every cycle as compared to its counterpart, which fires at every alternate cycle. This means at a given RPM a 2-stroke engine fires twice than the 4-stroke engine, producing not only almost twice the power of a 4-stroke engine but also double the sound of a 4-stroke engine.What bike goes 200 mph? ›
The 11 fastest motorcycles in the world are:
Ducati 1199 Panigale R: 202 mph. Damon Hypersport Premier: 200 mph. Ducati Panigale V4 R: 199 mph. Aprilia RSV4 1100 Factory: 199 mph.
No one in history has ever put down faster back-to-back runs sitting on a motorcycle. And at the same time, he became the first person to break the 300-mph mark in an FIM sanctioned meet, going 304.969 mph on one run. And oh yeah, Hudson is 67 years old.How fast is a 250cc dirt bike? ›
Generally speaking, 250cc bikes can reach speeds of 60-80mph. One of the fastest 250cc dirt bikes on the market is the Yamaha WR250F which allows you to switch between racing and standard modes to reach a top speed of 85mph.Do 125cc bikes have a clutch? ›
Like scooters, 125cc motorbikes tend to be light and nimble but have the added complication of learning gears and clutch control. This will stand you in good stead if you decide to progress later to a bigger bike.Can I jump start a 125cc with a car? ›
Yes, you can jump a motorcycle with a car as long as both vehicles use a 12-volt negative-to-ground system.
For more top end and faster top speed, use a large countershaft/front sprocket or smaller rear sprocket. This creates a taller gearing ratio that's best for high speed situations without many tight turns like wide open desert racing.Why do bikes vibrate? ›
Some motorcycles start to vibrate more as you put on the miles because of friction and heat. If you are low on engine oil, the internal components are not getting properly lubricated and that leads to a hot engine and more vibrations. Check the oil level from time to time and fill it up regularly.What makes a bike fast? ›
Real racing bikes are fast because they use supple high-performance tires. Their frames flex just the right amount for a powerful rider. Racing bikes are fast because the rider has little wind resistance thanks to the low riding position, narrow handlebars, and tight-fitting clothing.Can a 125cc go uphill? ›
Having said that a 125cc machine should be able to get up most inclines, even if you have to use the lower gears (assuming you're not after a scooter).Is 125cc good for long drive? ›
Long distance on a 125 is fine so long as you dont mind taking your time about it, i spend about 9 months on a Honda CG and covered around 11k miles quite frequently doing 200-300 miles trips without any problems, i then moved onto a honda varadero 125 and did a trip down to coventry and back and numerous other trips, ...Which 125cc has low seat height? ›
Honda MSX125 Grom
Right, time for a bike that is perfect for two things: Shorter riders and absolute monumental amounts of fun! The Grom is a bike that has a seat height of just 765mm, and a weight of 102kg, perfect for those shorter riders that need a low seat height and a lightweight machine.
These bikes tend to be extremely popular with first-time riders. They give you plenty of power without weighing you down on the road. Expect to get anywhere from 10 to 15 HP out of these bikes.
A great thing about 125cc bikes is they tend to have much better fuel economy in comparison to bigger bikes, which is ideal if you are using your motorcycle to commute to and from work (especially with the current fuel prices!). However, for longer or faster journeys they might not be so ideal.How fast does 125cc 3 speed go? ›
125cc karts can go up to 87mph (that's 140 km/h!). Most 125cc go-karts can reach a top speed of 70-80mph.Can a 125cc engine get up to 80mph? ›
The short answer is that the top speed of a 125cc, on average, is somewhere between 65mph and 80mph. However, to answer the question properly, we need to look at the factors that affect how fast a motorcycle can go and then we will give a short round-up of some of the fastest 125s on the market.
A 125cc four-stroke trail bike is great for kids that are at least 9 years old, but that also includes teens, young adults, females, or if you're an adult with short legs. A 125cc trail bike has about a 31″ seat height, depending on if you get a big wheel or small wheel model.How many gears does a 125cc dirt bike have? ›
Then finally, 125cc and above have manual clutches and four-to-six-speed transmissions, putting them the closest to full-size dirt bikes in terms of required techniques.Which is faster 125cc or 150cc? ›
You can expect a 150cc moped to reach an advanced speed of roughly 70 mph, which is a little faster compared to the speed of a 100cc or 125cc one. In general, a moped with a 150cc engine is more powerful than those with smaller engines. It becomes even more suitable for long travels as well as routine commutes.Are 125cc good on fuel? ›
Up to 125cc motorcycles (A1 licence) - Honda CB125F | 138.7mpg. Although it can't quite match the economy of its CBF125 predecessor or live up to Honda's claims of 150mpg, Honda's latest CB, as introduced in 2021 with an even more efficient engine, is still the class-leader in terms of fuel efficiency.Is 125cc good for a beginner? ›
A 125cc two-stroke or a 250cc four-stroke is great for a beginner; riders who weigh less than 150 pounds can handle bikes under 250cc, while larger riders will need the suspension found in 250cc models.How fast do 250cc dirt bikes go? ›
Generally speaking, 250cc bikes can reach speeds of 60-80mph. One of the fastest 250cc dirt bikes on the market is the Yamaha WR250F which allows you to switch between racing and standard modes to reach a top speed of 85mph.How fast can a 150cc dirt bike go? ›
The top speed of a 150cc dirt bike can vary, but the average top speed of a 150cc dirt bike is about 50 to 60 mph. Many factors can contribute to the potential top speed of a dirt bike.