Polaris RZR 170 Top Speed

Polaris RZR 170 Top Speed: How Fast? Upgrading Stock UTV

There I was, helmet on and hands gripping the wheel, the Polaris RZR 170 humming beneath me, ready to conquer the trails.

My heart raced with excitement as I hit the gas, eager to find out just how fast this bad boy could go.

If you’re like me, a speed enthusiast with a love for adventure, then you’re in the right place.

Jn this article, we’ll explore Polaris RZR 170 Top Speed and various ways to modify it for a faster and more thrilling experience.

Polaris RZR 170 Top Speed

Polaris RZR 170 Top Speed

Polaris RZR 170 UTV has a top speed of 25 mph, powered by a 169cc single-cylinder engine and a chain drive that delivers power to the rear wheels. Its low gearing provides good acceleration and quickness but limits the top speed.

If you want to increase the speed of your RZR 170’s speed on snow, check out the Best UTV Tires For Snow.

How to Increase Polaris RZR 170 Top Speed

Follow these steps to increase Polaris RZR 170 Top Speed:

  1. Adjust the Throttle Limiter: a. Locate the throttle limiting screw behind the gas pedal. b. Loosen the jam nut that holds the screw in place. c. Turn the screw inward to increase the speed or outward to reduce it. d. Tighten the jam nut to secure the screw in the desired position.
  2. Modify the Throttle Limit Tab: a. Identify the tab that the throttle limiter bolt is attached to. b. Bend the tab slightly forward to allow the gas pedal to max out. c. Avoid removing the throttle screw altogether to prevent the throttle cable from overstretching.
  3. Change the Gearing: a. Replace the stock 12-tooth front sprocket with a 13-tooth or 14-tooth sprocket. b. Keep in mind that increasing the top speed will slightly affect low-end torque.
  4. Tune the Electronic Control Unit (ECU): a. Consult a professional to have your ECU tuned for optimal air-to-fuel ratios. b. Tuning should result in improved throttle response, torque, and power.
  5. Upgrade the Suspension: a. Invest in aftermarket suspension components or kits designed for the RZR 170. b. Consider upgrading shock absorbers, springs, and sway bars for improved handling at higher speeds.
  6. Optimize Tire Selection: a. Choose tires specifically designed for the RZR 170 and suitable for your riding conditions. b. Ensure proper tire maintenance, including regular pressure checks and timely replacement.
  7. Ensure Proper Break-In: a. Follow the break-in period guidelines outlined in the owner’s manual. b. Avoid continuous operation above half-throttle for the first 3 hours and above ¾ throttle from hours 3 to 10.

Polaris RZR 170 UTV Specifications

These are the top 8 specifications of the Polaris RZR 170 UTV:

  1. Youth side-by-side intended for ages 10 and up
  2. 169cc single-cylinder engine
  3. 2WD-only transmission
  4. 48-inch width
  5. 6 inches of ground clearance
  6. 65-inch wheelbase
  7. Dry weight of 532 pounds
  8. MSRP for the 2021 model starts at $5,399

The RZR 170 reaches its top speed faster than its counterpart, the Polaris Ranger 570, but only after adjustments to the throttle limiter.

Throttle Limiter and Adjustments to Increase Polaris RZR 170 Top Speed

The throttle limiter serves as a safety feature for younger riders by restricting the top speed of the vehicle. Out of the box, the RZR 170 might only reach 15 mph due to the throttle limiter.

To increase the top speed, owners can adjust the throttle limiting screw located behind the gas pedal. By loosening the jam nut and turning the screw inward, the vehicle’s speed can be increased.

After reaching the desired speed setting, tighten the jam nut to secure the screw in place.

For those who want to push the Polaris RZR 170 Top Speed even further, adjusting the throttle limit tab can increase the vehicle’s top speed to around 35 mph.

This can be done by bending the tab that the throttle limiter bolt is attached to slightly forward, allowing the gas pedal to max out.

To prevent overstretching the throttle cable, it is advisable to bend the tab instead of removing the throttle screw completely.

Additional Methods to Increase Polaris RZR 170 Top Speed

If 25 mph is not fast enough, there are other ways to potentially increase the RZR 170’s top speed to around 40 mph. However, be aware that there is a trade-off between acceleration and top speed.

Changing the gearing is one option. Replacing the front sprocket with a slightly bigger one can increase top-end speed. The stock Polaris RZR 170 comes with a 12-tooth front sprocket and a 32-tooth rear sprocket.

To increase the top speed, consider upgrading to a 13-tooth or 14-tooth front sprocket, but be mindful that this may slightly affect the low-end torque.

Another way to increase the RZR 170’s performance is to tune its Electronic Control Unit (ECU).

A tuned ECU calculates the optimal air-to-fuel ratios for your vehicle, improving throttle response, torque, and power across all RPMs and throttle positions.

Importance of Break-In Period

The owner’s manual for the Polaris RZR 170 recommends a specific engine break-in period to ensure optimal performance.

The break-in period refers to the first 10 hours of operation, during which owners should avoid excessive engine heat as the various engine components wear and polish themselves to their correct operating clearances.

For the first 3 hours, avoid continuous operation above half-throttle, and from hours 3 to 10, avoid continuous operation above ¾ throttle.

As production of the Polaris RZR 170 ended in 2021, this break-in period may no longer apply but serves as important information for proper vehicle maintenance.

Before making any modifications to your Polaris RZR 170, it is crucial to consider the legal restrictions and regulations in your region or the off-road areas you plan to ride in.

Ensuring that your modifications comply with local laws will help you avoid potential fines or penalties.

Additionally, some off-road parks or trails may have specific requirements for vehicle modifications, so it’s essential to research these guidelines before making any changes to your RZR 170.

Effects of Terrain and Weather on Polaris RZR 170 Top Speed

The Polaris RZR 170’s top speed can be influenced by the type of terrain you’re riding on and the weather conditions.

For example, sandy or muddy surfaces might reduce the vehicle’s top speed due to increased resistance, while rocky surfaces can limit speed due to the need for careful maneuvering.

Weather conditions such as rain, snow, or extreme heat can also impact the performance of the RZR 170, potentially reducing its top speed or overall responsiveness.

Suspension and Handling Upgrades

Upgrading the suspension system of your Polaris RZR 170 can significantly improve handling and stability, especially when riding at higher speeds.

Consider investing in aftermarket suspension components or kits that are designed specifically for the RZR 170.

Some options include upgraded shock absorbers, stiffer springs, and sway bars. By enhancing the vehicle’s suspension, you can achieve a smoother and more controlled ride, even when pushing the limits of its top speed.

Tire Selection and Optimization

Selecting the right tires for your Polaris RZR 170 is essential for optimizing its performance and top speed.

Depending on the terrain you plan to ride on, you may need different tire types, such as sand paddles for dunes or aggressive mud tires for muddy trails.

The size of the tire, tread pattern, and inflation can also impact top speed and overall performance.

Choose tires that are specifically designed for the RZR 170 and suitable for the conditions you’ll be riding in. Proper tire maintenance, including regular pressure checks and timely replacement, will help ensure your vehicle’s peak performance.

What is the stock top speed of the Polaris RZR 170?

The stock top speed of the Polaris RZR 170 is 25 mph.

Can I increase the top speed of my Polaris RZR 170?

Yes, you can increase the top speed of your Polaris RZR 170 by adjusting the throttle limiter, changing the gearing, and tuning the ECU.

Will changing the sprocket size affect the RZR 170’s performance?

Changing the sprocket size can increase the top speed, but it may also slightly decrease the low-end torque.

How does the break-in period affect the Polaris RZR 170’s top speed?

A proper break-in period is essential for optimal engine performance and longevity. Following the break-in guidelines can help your RZR 170 achieve its peak performance and top speed.

Do suspension upgrades help improve the RZR 170’s top speed?

Suspension upgrades may not directly increase the top speed, but they can improve handling and stability at higher speeds, enhancing the overall riding experience.

How can I ensure that my Polaris RZR 170 remains in good condition while increasing its top speed?

Regular maintenance, proper tire selection, and following the break-in period guidelines are essential for keeping your RZR 170 in optimal condition while increasing its top speed.


The Polaris RZR 170 top speed of 25 mph can be achieved and potentially exceeded through various adjustments and modifications. By adjusting the throttle limiter, changing the gearing, or tuning the ECU, owners can enhance the vehicle’s performance to better suit their preferences. However, it is crucial to remember the importance of the break-in period for optimal performance and longevity.

While making these modifications can be exciting, it is essential to prioritize safety, especially for younger riders. The Polaris RZR 170 is designed to provide a thrilling off-road experience while maintaining safety features for its target audience. Always exercise caution and ensure that the vehicle is used responsibly, adhering to age recommendations and safety guidelines to ensure a fun and secure off-road adventure.

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