How to Make Razor Dirt Bikes Run Faster?

In this article, we will discuss the topic ‘How to Make Razor Dirt Bikes Run Faster?’. The Razor dirt bike stands out as an electric off-road bike from Razor USA, capturing hearts among kids and adults alike. Offering an affordable and exhilarating off-road experience, these bikes are powered by rechargeable batteries, rendering them eco-friendly with no gasoline requirements. Their quiet operation also makes them an excellent choice for residential areas.

Razor dirt bikes offer a range of models, including the MX350, MX650, and SX500. Each model comes with unique characteristics such as top speed, battery life, and features. While the MX350 stands as the basic option, the SX500 shines as the most advanced choice. For an affordable and eco-conscious off-road riding experience, a Razor dirt bike emerges as a fantastic option.

How to Turn On/Start a Razor Dirt Bike?

Starting a Razor dirt bike is a straightforward procedure, but it is crucial to handle it with caution. The first step is to ensure that the bike’s battery is fully charged. You can check the battery level by observing the indicator light on the controller. If the light is red, it means the battery is running low and requires charging.

To start a Razor dirt bike, ensure the battery is charged first. Once confirmed, turn on the ignition and press the start button while giving the bike a little throttle. If the dirt bike is difficult to start, it could be due to old spark plugs, which may hinder the ignition process. Remember to raise the kickstand before you begin to move.

Razor Dirt Bike Upgrades

Razor dirt bikes are popular choices for their affordability and beginner-friendly nature. However, to enhance their performance and tailor them to specific needs, many riders opt for Razor dirt bike upgrades. These upgrades can significantly improve ride quality, speed, and overall performance. For instance, upgrading the battery can result in extended riding times. Similarly, investing in a new set of tires can provide better grip and handling, particularly in challenging terrains. Other common upgrades include enhancing the suspension for improved ride comfort and stability or upgrading the seat for better rider comfort on long rides. Before undertaking any upgrades, it’s crucial to ensure compatibility with your specific Razor model and remember that significant modifications might affect the manufacturer’s warranty. Always prioritize safety and consider seeking professional guidance.

How to Make a Razor Dirt Bike Run Faster?

Enhancing the speed of a Razor dirt bike is not advisable due to safety concerns and potential legal implications. These bikes are designed with specific speed limits to ensure the safety of riders, particularly younger or less experienced individuals. Making modifications to the engine or components in an attempt to increase the bike’s speed can result in unpredictable handling and a higher risk of accidents. Despite the risk involved in it, if you really wish to modify and make your Razor bike go faster, then the followings are the recommendations to achieve the targeted objectives:

How to Make a Razor Dirt Bike Run Faster?
  • Upgrade Batteries (If Required)

Upgrading the battery to a higher voltage or capacity is essential for a Razor dirt bike as it provides a significant speed boost. The battery’s voltage is the primary determinant of the bike’s top speed, and opting for a higher voltage battery will grant more power, enabling you to reach maximum speed.

  • Maintain Tire Pressure

The manufacturer provides a recommended tire pressure for each Razor dirt bike model, which serves as a starting point. However, you might need to make adjustments based on the type of terrain you’ll be riding on. Additionally, tire pressure is influenced by temperature changes: high temperatures cause the outer tire to expand and increase pressure, while low temperatures cause contraction and a decrease in pressure.

  • Select the Suitable Tire

There is a wide variety of tires available on the market, but for improved speed, opt for ones specifically designed for that purpose. Look for tires with a smooth tread pattern and a complex compound. Additionally, upgrading to a lighter rim on your Razor dirt bike can contribute to shedding some weight, ultimately leading to increased speed.

  • Minimize Weight

Furthermore, the speed of a Razor dirt bike is significantly influenced by its weight, making it crucial to address. Even a slight reduction in weight can have a noticeable impact on the top speed. Therefore, it’s beneficial to remove unnecessary parts and replace heavy components with lighter alternatives, such as switching from stock tires to softer ones or replacing the stock exhaust with a lighter option.

  • Install Durable Motor

A Razor dirt bike typically comes with a standard 24-volt electric motor, enabling it to reach a top speed of approximately 15 mph. Installing an alternative motor, like a gas-powered one, may allow the bike to achieve a higher top speed. Nevertheless, it’s important to consider that such modifications can make the bike more challenging. It will make it difficult to control and may require additional safety measures.

  • Optimize the Suspension

Regularly maintaining your dirt bike suspension is crucial for achieving optimal performance and speed. Through routine inspections, lubrication, and adjustments of the suspension components. You can ensure that your bike effectively absorbs bumps and ruts, enabling you to maintain control and speed.

  • Gear Ration Adjustment

Adjusting the gear ratio is a straightforward yet effective method to enhance the top speed of your Razor dirt bike. By modifying the size of the sprockets on the engine and rear wheel, you can change the gear ratio, resulting in faster acceleration and the ability to reach higher speeds.

  • Best Quality Wiring

Among various factors affecting a Razor dirt bike’s speed, the wiring also plays a significant role. While the engine and gearing primarily determine the bike’s top speed, installing high-quality wiring can positively impact its overall performance. For instance, premium wiring can enhance throttle response and make the bike more responsive to the rider’s input.

  • Use Best Quality Throttle

Locate the throttle on your Razor dirt bike, as it serves as the control for managing your bike’s speed. Typically situated on the right handlebar, ensure it’s easily accessible. Invest in a high-quality throttle, as there are numerous options available on the market. So, opt for a throttle made from durable materials, providing a smooth and consistent action for better performance.

Why Would One Make a Razor Dirt Bike Run Faster?

By making modifications to the bike’s components, like the engine or exhaust system, you can improve its power and performance, leading to enhanced speed and acceleration. If you have intentions of participating in off-road racing or competitions, boosting the speed of your Razor dirt bike can give you a competitive advantage over other riders.

A faster dirt bike can be beneficial in specific off-road scenarios, aiding in conquering obstacles. Additionally, it can help in navigating challenging terrains, and managing steep inclines with greater ease. Customizing your Razor dirt bike for increased speed allows you to make it unique and tailor it to your preferences by selecting the desired modifications.

Razor Dirt Bike Controller

The Razor dirt bike speed controller is a device situated near the handlebars and connected to the bike’s motor. It incorporates a potentiometer, which is a variable resistor that enables the rider to adjust the bike’s speed. By turning the potentiometer, the resistance in the circuit is altered, affecting the power sent to the motor and subsequently changing the bike’s speed. Different types of speed controllers are available for Razor dirt bikes, including a simple potentiometer for continuous speed adjustment and controllers that allow the rider to select specific speeds.

Remove Limiter from Razor Dirt Bike

A limiter is a device employed to restrict the speed of an engine, commonly used on electric motors like those in Razor dirt bikes. Its purpose is to prevent the motor from running excessively fast, which could lead to damage or difficulty in control. However, to remove the limiter in a Razor dirt bike, you’ll require a Phillips head screwdriver, wire strippers, and electrical tape.

So, after gathering the necessary tools, follow these steps to remove the limiter in your Razor dirt bike: Disconnect the battery, locate the limiter, unscrew the holding screws, strip the insulation off the wire ends connected to the limiter, disconnect the wires, take out the limiter, reattach the wires to the limiter, and reconnect the battery. Ensure to prioritize safety and be aware of the potential risks associated with increased speed.

Advantages and Drawbacks of Removing the Limiter on a Razor Dirt Bike

Advantages Drawbacks
Enhanced Speed Increased Accident Risk
Improved Acceleration Legal Implications
Competitive Edge Warranty Void
Enhanced Performance Potential Bike Damage
Customization Reduced Safety Features

Razor MX350 Speed Limiter Removal

The Razor MX350 has a maximum speed of 14 mph under ideal conditions. However, the actual speed you can attain may vary based on factors such as your weight, the terrain you ride on, and the battery level. The bike comes equipped with a speed limiter that restricts its speed to 14 mph.

Removing the speed limiter on the Razor MX350 dirt bike is a straightforward process. Start by disconnecting the battery, then locate and disconnect the wires from the limiter. Afterward, remove the limiter, and finally, reconnect the battery with the connecting wires.

How to Upgrade the Battery of Razor MX350?

Upgrading the battery of a Razor MX350 is a popular modification known to enhance both performance and runtime. The stock battery on the MX350 is a 12V, 8Ah SLA (Sealed Lead-Acid) battery. However, there are several battery upgrade options available for this model.

So, one option is to replace the stock battery with a 12V, 9Ah SLA battery, which will extend the runtime to approximately 45 minutes on a single charge. Alternatively, you can opt for a more substantial upgrade by replacing the stock battery with a 24V, 9Ah SLA battery, providing a runtime of approximately 90 minutes on a single charge.

When considering a battery upgrade, it’s essential to weigh the advantages and disadvantages of boosting the battery’s capacity to ensure it aligns with your specific needs and usage requirements.

Speed Limiter on the Razor MX650 Dirt Bike

Unlocking the true potential of the Razor MX650 Dirt Bike is a desire for many riders due to its factory-set top speed of 16 mph. Fortunately, by removing the speed limiter, riders can significantly enhance the bike’s performance and versatility. After the modification, numerous Razor dirt bike riders have reported achieving speeds of up to 25 mph or even higher.

How to remove Razor MX500’s Speed Limiter?

Careful consideration should be given before deciding to increase the speed of a Razor dirt bike. There are several methods to achieve a faster bike. One option is to remove the speed limiter, allowing the bike to reach its maximum potential speed. Additionally, upgrading the battery can provide more power, enabling the bike to go faster for longer periods.

In the case of the Razor MX500 dirt bike, it comes with a speed limiter that restricts the speed to 15 mph. Additionally, if you desire to enhance the speed of your MX500, you can remove this limiter. The process involves disconnecting the battery, locating the limiter, disconnecting the wires from the limiter, and ultimately removing the limiter. Exercise caution and follow the appropriate steps to ensure a safe modification.


In conclusion, when considering modifications to a Razor dirt bike to increase its speed, one should weigh the benefits and potential drawbacks carefully. Upgrading the battery and removing the speed limiter are popular methods to enhance performance and achieve higher speeds. However, it is crucial to keep in mind that increasing the speed may come with increased risks, such as a higher chance of accidents and potential legal implications. Safety should always be a top priority when making any modifications to a dirt bike. By following proper procedures and guidelines, riders can enjoy a more powerful and thrilling experience while ensuring responsible and safe riding practices. Whether it’s removing the limiter on a Razor MX500 or customizing the Razor MX650, riders can find a balance between speed and safety to suit their individual preferences and riding needs.


Is it safe to remove the speed limiter on a Razor dirt bike?

Removing the speed limiter can increase the bike’s speed, but it also comes with potential risks. It is essential to exercise caution, wear appropriate safety gear, and understand the implications of increased speed before making any modifications.

Can I upgrade the battery of my Razor dirt bike to increase its speed?

Yes, upgrading the battery can provide more power, which may result in increased speed and longer ride times. However, it is vital to choose a suitable battery and ensure it aligns with the bike’s specifications.

Will removing the speed limiter void the warranty on my Razor dirt bike?

Removing the speed limiter may void the bike’s warranty. It’s essential to check the manufacturer’s guidelines and warranty terms before making any modifications.

How much faster can my Razor dirt bike go after removing the speed limiter?

The speed increase after removing the limiter can vary depending on the model and other factors. Riders have reported significant improvements, but it is crucial to prioritize safety and responsible riding.

Are there legal implications for making a Razor dirt bike go faster?

Yes, modifying a dirt bike to exceed speed limits may have legal consequences, especially if ridden in public areas or places with specific regulations. Always adhere to local laws and regulations concerning motorized vehicles.

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