Yamaha Raptor 660 Top Speed

Yamaha Raptor 660 Top Speed With Amazing Features

Yamaha Raptor 660 Top Speed

Yamaha Raptor 660 Top Speed

The Yamaha Raptor 660, an iconic sport ATV that made its inception in the early 2000s, quickly became a symbol of speed and power. Its short production run, spanning from 2000 to 2004, left a lasting impression in the world of off-road enthusiasts. During its brief time in the market, the Raptor 660 cemented its status as one of the most popular ATVs in the Yamaha sport quad lineup.

One of the standout features that set the Raptor 660 apart from its contemporaries was its remarkable top speed. This ATV was engineered for adrenaline junkies who craved the thrill of high-speed rides on rugged terrain. With a top speed that pushed the boundaries of what was possible in its era, the Raptor 660 established itself as the fastest option in Yamaha’s sport ATV arsenal.

The early 2000s marked a pivotal moment in the world of off-road vehicles, and the Yamaha Raptor 660 was at the forefront of this revolution. It represented the perfect marriage of modern sports models and cutting-edge technology, making it a sought-after choice for those looking to experience the thrill of riding a high-performance ATV.

Even today, many years after the end of its production run, the Yamaha Raptor 660 remains a beloved classic among ATV enthusiasts. For those who yearn to experience the sheer power and speed that defined this legendary machine, buying one is a decision that promises endless adventure and excitement on the trails. Yamaha’s Raptor 660 will forever hold a special place in the hearts of off-road enthusiasts as a testament to the pursuit of speed and exhilaration in the world of sport ATVs.

This guide provides comprehensive information regarding the speed, performance, and characteristics of the Raptor 660:

  1. Specs, key features, and performance
  2. Pros and cons
  3. Top speed
  4. Stock vs. modified top speed
  5. The speed limiter and whether you can bypass it
  6. The top 660-specific mods to increase the speed and horsepower

Specs, Key Features & Performance

Engine & Drivetrain

The heart of the Yamaha Raptor 660 beats with a formidable 660 cc single cylinder engine, delivering a remarkable burst of HP (Horsepower) that sends shockwaves through the world of sport ATVs. This powerplant, reminiscent of the MZ Baghira dirt bike’s German-made engine, is finely tuned for high-performance action.

Feeding the engine’s hunger for power is a precision-engineered Mikuni dual carburetor system, ensuring optimal throttle response and air-to-fuel mixture for maximum efficiency. This ATV’s drivetrain is a well-oiled machine, featuring a 5-speed manual transmission, a wet clutch system, and a secondary chain drive. These components work in perfect harmony to translate every ounce of power into speed, making it a formidable force on the trails.

The Raptor 660 is not just about forward gear; it’s equipped with reverse gear as well, providing versatility in maneuvering through challenging terrain. When you unleash the throttle, the sheer power generated by this ATV is awe-inspiring. With a max output that leaves competitors in the dust, the Raptor 660 showcases Yamaha’s commitment to delivering exceptional performance.

When it comes to competition, the Raptor 660 stands tall as a symbol of dominance. Its big-bore, 33 mm Mikuni carburetor ensures that the engine gets all the air it needs to maintain its peak power. The manual transmission and wet clutch further enhance the rider’s control over this beastly machine.

The chain drive, a hallmark of off-road prowess, transfers power to the rear wheels, delivering traction and agility when it’s needed most. Whether you’re racing through dirt trails or climbing steep inclines, the Raptor 660’s 2WD capability on the rear wheels ensures you stay ahead of the pack.

Engine Type 4 Stroke, SOHC
Cylinder Arrangement Single Cylinder
Displacement 660 cc
Engine Cooling Liquid-Cooled
Horsepower 36 HP
Fuel Delivery Dual 33mm Mikuni Carburetor
Fuel Capacity 3.2 US Gallons
Drive System Chain Drive, 2WD
Transmission Type Manual, Constant Mesh 5-Speed


The Yamaha Raptor 660 boasts an impressive suspension system designed to elevate your riding experience. At its core, the suspension setup features a double wishbone design with preload adjustment, ensuring optimal performance across various terrains. The inclusion of coil spring and oil damper shocks further enhances the Raptor 660’s capability, providing a smooth and controlled ride.

One notable aspect of the Raptor 660’s suspension is its swing arm design, which adds to its overall versatility. The rebound and compression adjustments on the gas coil spring shocks allow riders to fine-tune their ride feeling to match their preferences, delivering a customized experience that caters to individual needs.

While the Raptor 660’s suspension system is certainly impressive, some riders have expressed concerns about the lack of adjustability in certain areas. However, it’s important to note that the overall suspension setup, including the travel, turning radius, and ground clearance, strikes a commendable middle ground between off-road capability and on-road comfort. This equilibrium ensures that the Raptor 660 remains an excellent trail option.

The Raptor 660 features independent front and rear suspension, which contributes significantly to its exceptional ride quality. This system effectively absorbs shocks and vibrations, allowing you to confidently tackle rugged terrain while maintaining control. Whether you’re navigating rocky trails or exploring challenging landscapes, the Raptor 660’s suspension system proves itself as a reliable and capable companion.

Wheelbase 49 in
Ground Clearance 10.4 in
Front Suspension Independent Double Wishbone
Rear Suspension Swing Arm
Travel Front – 9.06 in, Rear – 8.66 in

Tires & Brakes

The Yamaha Raptor 660, a formidable all-terrain vehicle, boasts a powerful combination of features that make it a true beast when it comes to conquering various terrains. One of the key elements contributing to its outstanding performance is the choice of tires – Dunlop, renowned for their exceptional grip and durability. These tires are the foundation of the Raptor 660’s ability to easily tackle trails and terrains, providing the rider with confidence and control.

When it comes to ensuring safety and control, the braking system on the Raptor 660 is top-notch. Equipped with hydraulic disc brakes both at the front and rear, this ATV offers impressive stopping power. The front brakes, operated by a lever on the handlebar, provide precise control over braking force. Meanwhile, the rear brakes can be conveniently engaged using a foot pedal located within the comfortable footwell area.

The synergy between the steel rims, Dunlop tires, and the hydraulic disc braking system ensures that the Raptor 660 delivers a smooth and secure riding experience. Whether you’re navigating challenging terrains or trails, you can count on this ATV to provide the grip you need and the stopping power to keep you in control. Yamaha has truly engineered a masterpiece in the world of off-road vehicles, where every component, from the tires to the braking system, plays a pivotal role in achieving remarkable performance.

Front Tires 21 x 7-10 (Dunlop KT331)
Rear Tires 20 x 10-9 (Dunlop KT335)
Wheels Steel
Front Brake Type Dual Hydraulic Disc
Rear Brake Type Hydraulic Disc 


The Yamaha Raptor 660 is a remarkable sports model in the world of all-terrain vehicles. From an overall size and weight perspective, it strikes a balance that appeals to a wide range of riders. With its class-leading dry weight of just a few pounds, it’s evident that Yamaha has designed this pure sport ATV with precision and attention to detail.

One of the standout features of the Raptor 660 is its suitability for trail riding, making it an excellent choice for both smaller riders and lighter riders. Its compact build style allows for nimble maneuvering through wooded areas, providing an exhilarating experience for riders who love tackling challenging terrain.

Measuring at a 50-inch width, the Raptor 660 is perfectly suited for navigating BLM trails and other tight spaces without compromising stability. This dimension ensures that riders can confidently explore a variety of terrains, knowing that their ATV can handle the demands of the trail.

Length 72 in
Width 43.3 in
Height 45.3 in
Seat Height 33.9 in
Dry Weight 398 lbs

Pros & Cons

Being an old model, the main pros and cons of Raptor 660 from owner reviews are evident.

1. Extremely fast among sport ATVs.
2. Unrivaled low-end thrust and power for a pure sport model.
3. Great in taking corners.
4. High stance and engine torque allow easy rear sliding while cornering.
5. Durable, withstands harsh treatment.
6. 2002+ models have long gear ratios, reducing manual shifting.
7. Useful reverse gear for trail rides or getting unstuck.

1. The higher stance is akin to a tractor ride vs. a sports car experience.
2. Feels unstable and prone to tilting due to the higher center of gravity.
3. The starter clutch’s one-way bearing tends to fail.
4. 2000-2001 models have known transmission issues.
5. Carburetor can cause problems if not maintained properly.
6. Suspension is considered weak, with shocks having limited adjustability.
7. Despite being the lightest in its class, its weight can affect trail handling.

Raptor 660 Top Speed

The Yamaha Raptor 660 is renowned for its impressive performance on the trails, thanks to its robust 660cc single-cylinder engine. This powerplant is the heart of the Raptor, churning out a staggering 36 horsepower. When it comes to top speed, this beast doesn’t disappoint. In its stock form, the Raptor 660 can easily reach speeds of 72 to 75 mph, providing an exhilarating ride for off-road enthusiasts.

However, the true beauty of the Raptor 660 lies in its potential for upgrades. With a few modifications, the power output can be significantly increased, pushing the top speed well beyond the factory limits. Riders have reported achieving speeds of up to 85 mph with the right enhancements. These upgrades can take your Raptor 660 to new heights, making it a force to be reckoned with on any terrain.

When discussing the Yamaha Raptor 660 top speed, it’s important to consider the range of models available. Each model may have slight variations in performance, but they all share the same DNA of power and speed. Whether you opt for the earlier models or the more recent ones, the Raptor 660’s reputation for top-tier performance remains unwavering.

Improve Speed & Power

Six prevalent adjustments can be made to the Raptor 660 to enhance the horsepower and peak speed.

  1. Bypassing the speed limiter
  2. Upgrading the air intake
  3. Upgrading the exhaust
  4. Re-jetting the carburetors
  5. Adjusting the gear ratio
  6. Adding big tires

While a few of these modifications could improve the maximum speed, even with a speed limiter, you will need to circumvent the speed limiter first to see any significant speed enhancements.

Raptor 660 Speed Limiter

When it comes to enhancing the performance of your Raptor 660, one of the critical areas to consider is the speed limiter. The Raptor 660 is equipped with a speed limiter that restricts its top speed, primarily to ensure safety. However, for those looking to push the boundaries of their vehicle’s capabilities, understanding the interplay between the speed sensor, CDI unit, and other components is essential.

The speed limiter on the Raptor 660 is a built-in mechanism that limits the vehicle’s top speed. It does this by monitoring data from the speed sensor, which is connected to the output shaft. This sensor constantly measures the vehicle’s speed in mph (miles per hour) and relays this information to the CDI unit. The CDI unit, in turn, adjusts the engine’s performance based on the data it receives.

If you’re aiming to unlock higher speeds, you may consider modifying the Raptor 660’s settings. One common approach is to change the stock gearing and upgrade the tires. These two components play a significant role in determining the vehicle’s top speed. Upgraded gearing allows the Raptor to achieve higher speeds in each gear, while upgraded tires provide better traction and stability at those speeds.

However, it’s important to note that altering these components can have implications for the vehicle’s overall performance and safety. The speed limiter is in place for a reason, and bypassing it can lead to potential risks. There are one way speed limiter bypass options available, but they should be used with caution and a thorough understanding of the implications.

Bypassing The Speed Limiter

When it comes to bypassing the speed limiter on a vehicle like the Yamaha Raptor 660, understanding the role of the speed sensor and reluctor wheel is crucial. These components work in tandem to measure the vehicle’s speed. The reluctor wheel, with its teeth, sits on the output shaft, and as it spins, it triggers the speed sensor. The sensor, in turn, sends this data to the CDI unit, which is responsible for restricting the vehicle’s speed. To bypass this limiter, you need to access and manipulate these components.

To fool the system and achieve a true speed beyond the factory-set limit, you’ll need to remove the clutch side cover to gain access to the clutch basket and clutch case. The reluctor wheel, often with a specific number of teeth, plays a pivotal role here. By either grinding down some of these teeth or making necessary adjustments to the reluctor wheel, you can trick the sensor into reading a lower speed than the vehicle is actually traveling.

Once you’ve made the modifications to the reluctor wheel, you’ll need to reinstall it and the clutch components carefully. It’s important to ensure that the clutch functions properly after this process. By doing so, you effectively restrict the sensor from accurately measuring the vehicle’s speed, allowing you to reach higher speeds, possibly beyond the factory-set mph limit.

However, it’s important to exercise caution and responsibility when bypassing the speed limiter. Modifying these components can have implications for the vehicle’s safety and warranty. Always ensure that you are in compliance with local laws and regulations regarding vehicle modifications, and remember that with increased speed comes increased responsibility on the road.

Upgrading The Air Intake

Upgrading the air intake system on the Yamaha Raptor 660 is a crucial step for owners looking to unlock the full potential of their machine. The factory intake setup, while adequate for most riding conditions, leaves room for improvement when it comes to maximizing engine power and achieving top-end speed. One of the key components in this upgrade is the airbox, which plays a pivotal role in regulating airflow to the engine.

To begin the process of enhancing your Raptor’s performance, consider replacing the stock airbox with an aftermarket one designed specifically for sport models like the 660. These upgraded airboxes are engineered to optimize airflow, ensuring a consistent and ample supply of air to the engine. This increased airflow is essential for boosting power output and reaching higher RPM levels, ultimately translating into improved top-end speed.

Another critical element in the air intake system is the air filter. Upgrading from the stock air filter to a high-performance aftermarket filter is a wise choice. These filters are designed to trap more particles while allowing better airflow, resulting in cleaner air reaching the engine. Clean air means better combustion, which in turn leads to increased power and improved overall engine efficiency.

Modifying the airbox lid is another option to consider. Some aftermarket lids offer adjustable openings, allowing you to fine-tune the amount of air entering the intake system. This level of control can help you tailor the intake system to your riding preferences, whether you prioritize low-end torque or top-end speed.

When upgrading your air intake, it’s important to remember that water and debris can pose a risk to your engine. Ensure that your chosen aftermarket components are designed to provide adequate protection against these elements. Additionally, always follow manufacturer instructions for proper installation and maintenance to ensure the longevity of your upgraded air intake system.

Highest Recommended Intake Upgrades For Raptor 660:

  1. Modquad Racing Air Filter
  2. Pro Design Pro Flow Air Filter Kit

If you’re planning on maintaining the standard airbox while just changing the air filter, the top two choices would be a K&N filter or a UNI filter.

The K&N filter is excellent for conditions that aren’t dust-filled. However, if you often ride in dusty environments, your ideal option would be the UNI filter.

Upgrading The Exhaust

When it comes to upgrading the exhaust system of your Raptor 660, you can significantly enhance the engine’s performance, increasing both horsepower and torque. This improvement is achieved by optimizing the airflow and making the air circulation process more efficient within the exhaust system. Yamaha’s Raptor 660, in its stock form, often leaves riders yearning for more power and a more exhilarating riding experience. Upgrading the exhaust system addresses these concerns while also enhancing the sound profile of the machine.

One of the key aspects of upgrading the exhaust is the modification of the exit path for exhaust gases. By doing so, you not only improve the sound, but you also allow for a smoother airflow, which results in more efficient engine operation. The enhanced airflow contributes to better power delivery, giving you that exhilarating feeling of increased horsepower and torque when you twist the throttle.

Furthermore, the exhaust system plays a crucial role in the overall performance of your Raptor 660. By choosing the right aftermarket exhaust and optimizing it for your specific riding style and terrain, you can unlock the full potential of your machine. This means selecting the right materials, designs, and even the number of gears in your exhaust system to maximize the benefits of your upgrade.

The benefits of upgrading the exhaust go beyond just the tangible improvements in horsepower and torque. The sound that your Raptor 660 produces is an essential part of the riding experience. With the right exhaust system, you can achieve a deep and powerful exhaust note that not only sounds thrilling but also enhances the overall enjoyment of your rides.

Highest Recommended Exhaust Upgrades For Raptor 660:

  1. Barker’s Exhaust
  2. Curtis Sparks Exhaust
  3. HMF Exhaust
  4. Monster Exhaust
  5. Yoshimura Exhaust

Re-jetting The Dual Carburetor

When it comes to maximizing the performance of your Yamaha Raptor 660, one crucial aspect to consider is the re-jetting of the dual carburetor system. This process involves making specific modifications to the carburetors, jets, and air-to-fuel ratios, resulting in an upgraded intake and exhaust system. By doing so, you can significantly increase the airflow and fuel flow, leading to optimal engine performance.

Re-jetting the dual carburetor system is a specialized technique tailored to the unique needs of the Yamaha Raptor 660 model. This modification entails adjusting the carburetors to achieve the perfect air-to-fuel ratios for enhanced power output. The key here is trial and error, as each machine may require slightly different settings to achieve the desired results.

Upgrading the intake and exhaust systems plays a pivotal role in this process. The upgraded intake allows for a higher volume of air to enter the engine, while the modified exhaust system facilitates better exhaust gas flow. These changes, coupled with precise carburetor adjustments, create a harmonious balance in the engine’s operation, resulting in increased power and torque.

When re-jetting the dual carburetor, it’s essential to consider the specific needs of your Yamaha Raptor 660 model. Different models may require unique jet replacements and adjustments to optimize performance fully. This process is not only about increasing airflow but also about achieving the perfect air-fuel mixture for your machine.

Main Jets
The factory-installed main jet size consists of a #140 in the left carburetor and a #145 in the right carburetor.

It is advisable for owners to consider upgrading to either a #160 main jet in the left carburetor and a #165 in the right carburetor, or a #170 main jet in the left carburetor paired with a #175 main jet in the right carburetor.

However, you might want to purchase a variety of main jets ranging from sizes 160 to 220 and experiment with them to discover the optimal fit for your specific needs.

Pilot Jets
Both carburetors on the Raptor 660 come equipped with a stock pilot jet size of 22.5. A recommended upgrade involves switching to a size 25 pilot jet.

To make this adjustment, you’ll need to replace the pilot jets in both carburetors, and it may be necessary to try out a few different sizes to fine-tune performance.

Needle Jet
Each of the stock carburetors contains a needle jet, and instead of replacing them, they can be adjusted by turning them.

Typically, turning each needle jet between one to two full rotations tends to yield the best results. However, owners should experiment with these adjustments to determine the ideal setting for their specific circumstances.

Adjusting The Gearing

When it comes to adjusting the gearing of your Raptor 660 quad, understanding the relationship between gear ratio and top speed is crucial. The gear ratio, determined by the combination of front and rear sprockets, plays a pivotal role in shaping your quad’s performance. Whether you’re looking to increase your top speed or enhance low-end torque and acceleration, making strategic adjustments to your sprockets can make all the difference.

To increase your Raptor 660’s top speed, you might consider swapping out the stock sprockets for slightly larger ones. This adjustment will allow your quad to reach higher speeds more efficiently, sacrificing a bit of low-end torque in exchange for improved top-end speed. It’s a common practice among enthusiasts seeking that extra mph on the trail.

Conversely, if you’re looking for quicker acceleration and low-end torque, you can opt for slightly smaller sprockets. This setup will provide you with better off-the-line performance, making it ideal for tackling challenging terrain or sprinting through tight corners.

In the world of quad customization, finding the right gear ratio balance is key. It’s all about adjusting the gearing to suit your specific needs and riding style. Whether you’re aiming for top-end speed or optimizing your quad for maximum acceleration, understanding the gear ratio and making informed choices regarding your front and rear sprockets is essential for achieving the desired results with your Raptor 660.

Adding Bigger Tires

When it comes to enhancing the performance of your Yamaha Raptor 660, one of the most effective upgrades you can consider is upgrading to bigger tires. The stock tires that come with the Raptor 660 are undoubtedly reliable, but if you’re looking to take your ATV’s top-end speed to the next level, a tire upgrade is the way to go.

The first thing you’ll want to focus on is the size of the tires, both in the front and rear. Bigger tires can make a significant difference in your Raptor 660’s performance. You can consider options like 21-inch, 22-inch, or even 23-inch tires, depending on your specific requirements and riding style.

Upgrading to larger tires not only equips your Raptor 660 with an extra edge but can also help improve its top-end speed. With the added inches in tire diameter, your ATV can achieve higher speeds, pushing the boundaries of what it can do.

Many Raptor 660 enthusiasts have reported notable increases in their ATV’s top-end speed after making the switch to bigger tires. You can expect improvements in mph that will enhance your riding experience and allow you to tackle various terrains with ease.


The Yamaha Raptor 660, a renowned quad in the world of Yamaha ATVs, captures the essence of speed and performance. Enthusiasts are continually drawn to this machine, seeking to unlock its true potential and surpass its full stock capabilities. The desire to reach faster top speeds is a common pursuit among riders, often involving modifications to bypass the speed limiter.

Within the industry, Yamaha ATVs have solidified their reputation for reliability and power, making the Raptor 660 a standout model. It’s not just about going fast, but also about the journey of discovering how to do so, thanks to the guidance available in various resources.

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