How to Make a 4 Stroke Scooter Faster

To make a 4 stroke scooter faster, you can upgrade the exhaust system and air filter, install a performance carburetor, use a lighter-weight roller/slider weights in the variator, increase the engine compression, and tune the fuel-air mixture. These modifications can improve the scooter’s acceleration and top speed.

Additionally, regular maintenance such as changing the engine oil, checking tire pressure, and cleaning the scooter’s components can help maintain its performance. It is important to note that modifying a scooter may void the warranty and could potentially be illegal in some areas, so it is essential to research and adhere to local laws and regulations.

How to Make a 4 Stroke Scooter Faster

Upgrade The Exhaust System

Your scooter’s exhaust system plays a crucial role in its overall performance. By upgrading the exhaust system, you can give your 4-stroke scooter a significant boost in speed and power. Researching and choosing the right exhaust system, removing the old one, and installing the new system correctly can make a remarkable difference. Let’s dive into the process step by step.

Research And Choose The Right Exhaust System

To begin, it is important to research and select the right exhaust system for your scooter. A well-suited exhaust system will enhance your scooter’s performance without compromising its reliability. Consider factors such as the brand reputation, customer reviews, and compatibility with your scooter’s make and model. Look for exhaust systems specifically designed for 4-stroke scooters to ensure optimal results.

Remove The Old Exhaust System

Once you have chosen the perfect exhaust system, it’s time to remove the old one. Removing the old exhaust system may require some basic tools and mechanical know-how. Follow these steps:

  1. Start by locating the exhaust pipe, which is typically positioned underneath the scooter.
  2. Use a wrench or socket set to loosen the bolts that secure the exhaust pipe to the engine.
  3. Gently slide the exhaust pipe out of the mounting bracket and disconnect it from the engine.
  4. Store the old exhaust system in a safe place or dispose of it properly.

Install The New Exhaust System

Now that the old exhaust system has been removed, it’s time to install the new one. Follow these steps for a successful installation:

  1. Take the new exhaust system out of its packaging and inspect all the components.
  2. Begin by attaching the exhaust pipe to the mounting bracket and aligning it with the engine.
  3. Connect the exhaust pipe to the engine, ensuring a snug fit.
  4. Tighten the bolts that secure the exhaust pipe to the engine.
  5. Double-check all connections and ensure they are secure.

By upgrading your scooter’s exhaust system, you can unlock its full potential and enjoy a faster and more powerful ride. Take the time to research and choose the right exhaust system, remove the old one carefully, and install the new system correctly. With these steps, you’ll be well on your way to making your 4-stroke scooter faster than ever before!

Improve Air Intake

Improving the air intake system of your 4-stroke scooter is a key step you can take to make it faster and enhance its overall performance. By upgrading the air filter, installing a performance carburetor, and optimizing the airflow, you can significantly increase the power and speed of your scooter. In this section, we will explore each of these steps in detail.

Upgrade The Air Filter

Upgrading the air filter is a simple yet effective way to improve the air intake of your scooter’s engine. The stock air filter that comes with your scooter may be restrictive, limiting the amount of air flow. By replacing it with an aftermarket high-performance air filter, you can allow more air to enter the engine, resulting in improved combustion and increased power. Look for air filters that are specifically designed for your scooter model and that offer better filtration and higher airflow.

Install A Performance Carburetor

A performance carburetor is another upgrade that can make a significant difference in your scooter’s speed and acceleration. The carburetor is responsible for mixing the air and fuel in the engine. By replacing the stock carburetor with a high-performance one, you can achieve a better air-to-fuel ratio, allowing for improved combustion and more power. It is essential to choose a carburetor that is compatible with your scooter’s engine and provides the right air and fuel mixture for optimal performance.

Optimize The Airflow

Optimizing the airflow within your scooter’s intake system can further enhance its performance. Starting from the air filter, make sure that all components in the intake system, such as the hoses and connectors, are clean and free from any obstructions. Check for any leaks or cracks that may be affecting the airflow, and replace or repair the damaged parts accordingly. Additionally, consider upgrading the intake manifold and the intake tube to improve the air flow efficiency.

In conclusion, improving the air intake system is crucial for making your 4-stroke scooter faster. By upgrading the air filter, installing a performance carburetor, and optimizing the airflow, you can unleash the full potential of your scooter’s engine, resulting in increased speed and overall performance.

Increase Engine Compression

How to Make a 4 Stroke Scooter Faster

To increase the engine compression of a 4-stroke scooter, you can adjust the valve clearance, upgrade the piston and cylinder head, or switch to higher octane fuel. These modifications can help make your scooter faster by improving the power output and efficiency of the engine.

Increasing Engine Compression

Making your 4 stroke scooter faster requires several modifications, and one of the most effective ways is to increase the engine compression. This can significantly improve the scooter’s overall performance and give you that extra boost of speed you’re looking for. In this section, we will discuss three key steps to increasing engine compression: choosing the right piston, using a higher compression cylinder head, and adjusting the camshaft.

Choose The Right Piston

Choosing the right piston is crucial when aiming to increase engine compression. You’ll want to select a piston with a higher compression ratio, which determines the amount of air and fuel mixture that can be squeezed into the combustion chamber. Opting for a performance piston with a smaller combustion chamber volume will help to increase the compression ratio, resulting in a more powerful and faster scooter.

Use A Higher Compression Cylinder Head

Another effective way to increase engine compression is by using a higher compression cylinder head. This component sits on top of the engine block and contains the combustion chamber. By replacing the stock cylinder head with a higher compression alternative, you can effectively reduce the combustion chamber volume, leading to increased compression. This modification will create a more efficient combustion process, resulting in improved power and acceleration.

Adjust The Camshaft

The camshaft plays a critical role in controlling the opening and closing of the engine’s valves, which directly impact engine performance. By adjusting the camshaft, you can optimize the timing and duration of valve openings, allowing for improved airflow into and out of the combustion chamber, thereby increasing compression. A performance camshaft designed for higher rpm range can further enhance your scooter’s power and performance.

To summarize, increasing engine compression is a key factor in making your 4-stroke scooter faster. By choosing the right piston, opting for a higher compression cylinder head, and adjusting the camshaft, you can dramatically improve your scooter’s overall performance and enjoy a faster and more thrilling ride.

Tune The Fuel System

If you want to make your 4-stroke scooter faster, one of the best ways is to tune the fuel system. By adjusting the fuel mixture and upgrading to a fuel controller, you can unleash the full potential of your scooter’s engine. In this article, we will explore these options in detail to help you achieve the speed and performance you desire.

Use A Re-jetting Kit

A re-jetting kit is a valuable tool that allows you to adjust the fuel flow in your scooter’s carburetor. When the engine receives the perfect amount of fuel, it can operate at its peak performance, resulting in faster acceleration and top speed. To use a re-jetting kit, you’ll need to follow these steps:

Adjust The Fuel Mixture

In addition to using a re-jetting kit, adjusting the fuel mixture can also significantly impact your scooter’s speed and power. This process involves finding the right balance between air and fuel, allowing for efficient combustion and improved performance. To adjust the fuel mixture, follow these steps:

  1. Locate the fuel mixture screw on your scooter’s carburetor.
  2. Start by turning the screw clockwise until it lightly seats, and then turn it counterclockwise the number of turns specified in the manual.
  3. With the engine warmed up, adjust the screw slightly clockwise or counterclockwise until you find the smoothest and most responsive throttle response.
  4. Repeat the process as needed until you achieve optimal performance.

Upgrade To A Fuel Controller

If you’re looking for a more advanced and precise method to tune your scooter’s fuel system, consider upgrading to a fuel controller. A fuel controller allows you to adjust the fuel injection and timing with greater accuracy, resulting in improved power delivery and speed. Here’s how to upgrade to a fuel controller:

  1. Research and select a suitable fuel controller that is compatible with your scooter’s make and model.
  2. Consult the installation guide provided by the manufacturer to ensure you understand the process thoroughly.
  3. Remove the stock fuel injection module and replace it with the fuel controller according to the manufacturer’s instructions.
  4. Ensure all connections are secure and test the scooter to ensure the fuel controller is functioning correctly.

By tuning the fuel system of your 4-stroke scooter, you can unlock its maximum performance and make it faster than ever. Whether you choose to use a re-jetting kit, adjust the fuel mixture, or upgrade to a fuel controller, be sure to follow the instructions carefully and test the results to achieve the desired outcome.

Enhance Ignition Timing

One of the key factors in making your 4-stroke scooter faster is enhancing the ignition timing. By optimizing the timing of the spark plug, you can improve the overall performance and power output of your scooter. In this section, we will discuss two effective methods to enhance ignition timing.

Install An Aftermarket Ignition Coil

Upgrading to an aftermarket ignition coil can significantly improve the ignition timing of your 4-stroke scooter. Unlike the stock ignition coil, an aftermarket coil is designed to deliver a stronger and more consistent spark to the spark plug. This allows for better combustion of the fuel-air mixture in the engine, resulting in increased power and speed.

Adjust The Timing

Another way to enhance ignition timing is by adjusting the timing of the spark plug. This process involves rotating the stator plate, which controls the position of the ignition timing. To perform this adjustment, follow these steps:

  1. Locate the stator plate on your scooter’s engine.
  2. Loosen the mounting bolts to allow for rotation of the plate.
  3. Rotate the plate in small increments, either clockwise or counterclockwise, until you find the optimal timing position. This position will depend on your specific scooter model.
  4. Tighten the mounting bolts to secure the stator plate in its new position.
  5. Start your scooter and test the performance. If needed, further fine-tune the timing by repeating the above steps.

By adjusting the timing, you can achieve a balance between power and fuel efficiency, ultimately making your scooter faster.

Ensure Proper Spark Plug Gap

The spark plug in your scooter plays a crucial role in the ignition process. To ensure optimum ignition timing, it’s important to maintain a proper spark plug gap. A wider gap allows for a more powerful spark, resulting in improved combustion and performance. Follow these steps to check and adjust the spark plug gap:

  • Remove the spark plug from your scooter’s engine using a spark plug socket.
  • Inspect the gap between the center and ground electrodes. Use a gap gauge to measure the distance.
  • If the gap is too narrow or wide, adjust it accordingly by bending the ground electrode slightly.
  • Reinsert the spark plug into the engine and tighten it with the spark plug socket.
  • Ensure that the spark plug is securely in place.

By maintaining the proper spark plug gap, you can optimize ignition timing and maximize your scooter’s speed.

How to Make a 4 Stroke Scooter Faster


Frequently Asked Questions On How To Make A 4 Stroke Scooter Faster

How Fast Can A 4 Stroke 50cc Go?

A 4 stroke 50cc can typically reach speeds up to 40-45 miles per hour.

How Can I Increase My Scooter Speed?

To increase your scooter speed, you can try these tips: 1. Upgrade your scooter’s engine and exhaust system for more power. 2. Optimize the scooter’s weight by removing unnecessary accessories. 3. Improve aerodynamics by adding a windscreen or lower the handlebars.

4. Maintain proper tire pressure and use high-quality tires for better grip. 5. Keep up with regular maintenance, such as cleaning air filters and lubricating moving parts, to ensure optimal performance.

How Can I Increase My Scooter Acceleration?

To increase your scooter acceleration, consider the following tips: 1. Check the air filter and replace if necessary. 2. Ensure the spark plugs are in good condition. 3. Use a high-quality fuel and maintain the correct fuel mixture. 4. Reduce weight on the scooter by removing unnecessary items.

5. Regularly maintain and lubricate the scooter’s engine components.

How Fast Does A 49cc 4 Stroke Scooter Go?

A 49cc 4 stroke scooter can reach speeds of up to 30-35 miles per hour.

How Can I Make My 4 Stroke Scooter Faster?

To make your 4 stroke scooter faster, you can consider upgrading the exhaust system, tuning the carburetor, adjusting the air intake, and installing a high-performance air filter.


To unleash the full potential of your 4 stroke scooter, follow these tips and make it faster than ever. Upgrade the air filter and exhaust system for improved performance, and consider adding a fuel controller to optimize fuel delivery. Additionally, properly maintaining your scooter and keeping it clean can make a noticeable difference.

Remember, with the right modifications and care, you can take your scooter to new speeds and enjoy a thrilling ride.

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