How Fast Does a 250cc Dirt Bike Go? – Average Max Speed

Written by

James Stevens

Fact-checked by

Robert A. Verdin

how fast does a 250cc dirt bike go

If you are new to dirt biking, this question might fill your mind: how fast does a 250cc dirt bike go?

A dirt bike’s speed depends on many factors, like the engine, terrain, or rider’s skill and experience. What is the speed of a 250cc in mph? Usually, the 250cc dirt bike’s top speed ranges from 60-70mph and can hit around 85 mph at the most.

However, this is just the tip of the iceberg. This guide will help you delve deeper into how fast a 250cc dirt bike goes. Read on to learn more.

Speed of Different Bike Models and Brands

Honda 250cc dirt bike and Yamaha 250cc dirt bike are familiar brands that offer quality vehicles for enthusiasts and profeisonals. However, there are also other brands that introduce high-speed dirt bikes that are smooth and safe to ride.

Dirt bike models Top speed (est.)
Honda CRF250R 67 mph (108 km/h)
KTM 250 SX-F 71 mph (114 km/h)
Yamaha YZ250 65 mph (104 km/h)
Husqvarna FC250 71 mph (114 km/h)

Speed of Different Engine Types

Engine Stroke Average Speed Max/Top Speed
Four-Stroke  55 to 70 mph 80 mph
Two-Stroke 70 to 80 mph 85 mph

Factors Affecting 250cc Dirt Bike Top Speed

To know the speed of a 250cc motorcycle, you need to consider and understand the types of engines, RPM, rider expertise, and more. Here is an in-depth explanation of the bike’s technicalities in relation to its speed.

1. Types Of Engine Strokes

When speed is taken into consideration, you must understand how the engine works. The term engine stroke describes the movement of a piston inside the bike’s engine. 250cc dirt bikes may have two engine strokes: four-stroke and two-stroke.

 01  Four-Stroke


A 250cc typically uses a four-stroke cycle, including intake, compression, power, and exhaust strokes.

They are known to be fuel-efficient and produce less emissions. They also provide more low-end torque making it more fitting for off-roading. A 250cc 4 stroke dirt bike can reach 55 to 70 miles per hour (mph).

 02  Two-Stroke


In contrast, a two-stroke 250cc is more lightweight. A 250 2 stroke top speed could reach 70 to 80 mph. Most dirt bike riders prefer this engine stroke to the previous one as it produces more speed.

However, the downside of a two-stroke 250 is its fuel efficiency and lower durability. Driving at a higher speed produces louder noise and vibration. It consumes more fuel, emitting more pollutants than the four-stroke.

2. The Rider’s Skill Level And Experience


The speed of the 250cc relies not only on its engine and modifications. Regardless of how fast a bike can go based on its specifications, you, as its rider, define its full-speed potential.

If you are a beginner, remember that the likelihood of reaching high speeds is less than experienced ones.

3. RPM And Terrain


RPM (revolutions per minute) is directly related to the speed of a 250cc dirt bike. It affects the bike’s power output and how fast it can go. The rule of thumb is the higher the rpm, the faster a bike can go.

The average rpm range for 250cc falls around 2000 – 13700 for 4-stroke and 1500 – 9000 for 20stroke.

The 250cc dirt bike engine produces more torque and power in a range where you should learn how to balance the rpm with the bike speed and the terrain.

A slippery terrain requires higher rpm, while smoother terrain needs higher gear and lower rpm to conserve fuel. But, revving up your 250cc beyond the optimal level can bring damage to your engine.

Fastest 250cc Dirt Bikes

Below is the table of the top five fastest 250cc bikes, together with their maximum accelerations and type of engine.

250cc Dirt Bike Model Name Top Speed Engine Stroke
KTM 250 SX-F 80 mph (130 km/h) 4-stroke
Honda CRF -250RX 70 mph (113 km/h) 4-stroke
Husqvarna FC 250 72 mph (116 km/h) 4-stroke
Yamaha YZ450F 80 mph (129 km/h) 4-stroke
Kawasaki XK250 85 mph (137 km/h) 2-stroke
Yamaha WR250F 85 mph (137 km/h) 2-stroke
Kawasaki Ninja 250R 105 mph (169 km/h) 4-stroke

Tips to Increase a 250cc Dirt Bike Speed


How to make your 250cc bike go faster? It is among the most common search histories for a newbie dirt bike rider. Nowadays, making your motorcycle faster is a no-brainer. However, this has limitations considering your bike’s features and specs. Here are some ways to increase your 250cc speed.

Honda 250cc dirt bike and Yamaha 250 dirt bike are familiar brands that offer quality vehicles for enthusiasts and professionals. However, there are also other brands that introduce high-speed dirt bikes that are smooth and safe to ride.

Below is the table of the top five fastest 250cc bikes, together with their maximum accelerations and type of engine.

  • Upgrade your exhaust system
  • Reduce a 250cc dirt bike weight by replacing heavy components with light ones
  • Modify suspension to gain more stability and control
  • Change to a high-performance carburetor for a fuel flow and air intake increase
  • Install a larger rear sprocket or a smaller front sprocket
  • Install a high-performance air filter
  • Upgrade the exhaust system

Frequently Asked Questions


4 Stroke Dirt Bikes vs. 2 Stroke: Which is faster?

Two-stroke bikes are lighter and faster than four-stroke bikes. However, that does not mean that one is better than the other. It ultimately comes down to personal preference and the specific intended use of the bike.

How much does a 250cc dirt bike weigh?

On average, a 250cc dirt bike weighs anywhere from 200 to 250 pounds (90 to 113 kg). However, some bikes may consider more or less than this range considering their make and model.

Is riding a 250cc dirt bike at high speeds safe?

A 250cc dirt bike is built to handle high speeds. But it would be best to remember the importance of driving carefully and abiding by local rules and ordinances. Put on the proper safety gear like a helmet.

Can a 250cc dirt bike be used for racing?

Yes, you can race on a 250cc dirt bike. There are already available events featuring 250cc bikes that you can join in, like motocross and enduro races.

How long does a 250 dirt bike engine last?

On a 250cc 4-stroke enduro bike, a top-end may last you 50 to 100 hours or more before it loses compression. In general, if race engines are pushed very hard, they may only last for five hours. However, this scenario usually applies to the world’s top racers.


So, how fast does a 250cc dirt bike go? What are the factors that contribute to its speed? As you can see, this guide is jam-packed with answers and information about the said questions.

I hope that this will serve as a stepping stone for you to become the fastest 250cc dirt bike rider. Wishing you a safe and enjoyable ride!

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James Stevens

James Stevens is an expert bike mechanic who knows everything from basic repairs to custom modifications. What sets him apart is his ability to explain complex concepts in a way that's easy to understand. Check out his content on Speedway if you need help with upgrades or modifications for your bike.