The introduction of the Yamaha Raptor 660 rocked the ATV community with its phenomenal performance and sporty yet rugged appeal. Launched in 2001, the Raptor 660 had a brief run when Yamaha decided to replace this quad with the bigger-bored Raptor 700.
The Yamaha Raptor 660 came to be as a response to the ever-evolving world of off-road vehicles, especially in the sport quad realm. One of the issues that Yamaha had to contend with back in the 2000s, apart from the fierce competition against ATV manufacturing heavyweights like Can-Am, Honda, and Kawasaki, was the emission laws that were strictly observed in the US and other countries. That’s because most of Yamaha’s heavy-hitters, such as the two-stroke Warrior 350 and the Banshee 350, to name a few, belonged to that category.
In response, Yamaha came up with one of the boldest and baddest quads ever at that time, the four-stroke, dual-carbed Raptor 660. What was unique about the Yamaha Raptor 660 was that it was the Japanese company’s first big-bore quad and also the first of its kind in the ATV world.
With its twin carburettors and five cylinders, this vehicle sported two intake valves—a feature that helped increase the fuel and air intake, enabling the engine to produce more power as a result. This new configuration did not just make this big-bored 660 emissions-compliant, but this speed monster was also so powerful that it became a point of reference in terms of how sport ATV should perform.
After its inception, the Yamaha Raptor could go toe-to-toe with some of the reigning ATVs at that time—such as the Honda Sportrax 400EX or the CanAm Bombardier DS, to name a few—and got impressive results. A powerhouse of an ATV, this quad was even more appreciated because of its sleek and sporty aesthetics.
However, the Raptor 660 only had a short production run despite its phenomenal success and after setting the benchmark specs for sport ATVs. That’s because, in 2005, Yamaha replaced the high-performing 660 with the more badass, more powerful Raptor 700. This improved version had a higher displacement of 686 ccs and had an equally remarkable power as its predecessor, but with the notches cranked up to outstanding. Nevertheless, the reputation that this strapping, highly reliable Raptor 660 had built during its four-year reign has turned into a legacy that continues to live up to this day.
What Are the Different Models of the Yamaha Raptor 660?
Yamaha released four models of the Raptor 660 during its short, four-year production stint, which began from 2000 and lasted until 2004. Despite its short-lived reign, the Raptor 660 became one of the well-loved ATVs because of its speed and incredible horsepower.
Shortly after it was released, the Yamaha Raptor 660 had set the standard for sports quads, which earned it the title Sport ATV of the Year in 2001. Furthermore, with its revolutionary engine configuration and overall design, this four-wheeler became an iconic ride because it lived up to the expectations of ATV enthusiasts.
Below are the different Raptor 660 models that Yamaha produced during its brief production run. Apart from these base models, Yamaha also released limited and special edition trims from 2004 to 2005, which were the YFM660LERS and YFM660RSET.
| Year | Model |
| 2001 Yamaha Raptor 660 | YFM660RN/C |
| 2002 Yamaha Raptor 660 | YFM660RP |
| 2003 Yamaha Raptor 660 | YFM660RR |
| 2004 Yamaha Raptor 660 | YFM660RS |
| 2005 Yamaha Raptor 660 | YFM660RT |
What Is the Cost of a Yamaha Raptor 660?
The suggested list price of a 2001 to 2003 Yamaha Raptor 660, according to www.nadaguides.com, remains consistent at $6,499. Meanwhile, the 2004 and 2005 versions fetch at $6,199. The trade-in website, www.atv.com, also reflects the same value for the ‘04 to ‘05 Raptor 660. Given the level of power this quad can put up, there’s no doubt it remains on the pricier side.
However, despite this quad being one of the best-selling quads still equipped with carburettors, it is wise to note that any existing model would have been likely used or modified. These two factors could heavily affect the price of this two-wheel-drive ATV. Some trade-in websites offer earlier models of the Raptor 660 at a cost-effective rate that ranges from $1,900 to $2,800.
Below are the current suggested retail rates of the Raptor 660 according to www.nadaguides.com, along with the Limited and Special Editions models. This list also includes their corresponding low retail and average retail costs.
| Year / Model | Suggested Retail Value | Low / Average Retail Value |
| 2001 Yamaha Raptor 660 / YFM660RN/C | $6,499 | $1,725 / $2,270 |
| 2002 Yamaha Raptor 660 / YFM660RP | $6,499 | $1,760 / $2,315 |
| 2003 Yamaha Raptor 660 / YFM660RR | $6,499 | $2,260 / $2,975 |
| 2004 Yamaha Raptor 660 / YFM660RS | $6,199 | $2,335 / $3,075 |
| 2005 Yamaha Raptor 660 / YFM660RT | $6,199 | $2,415 / $3,175 |
| 2004 Yamaha Raptor 660 Limited Edition / YFM660LERS | $6,399 | $2,385 / $3,140 |
| 2005 Yamaha Raptor 660 Special Edition / YFM660RSET | $6,399 | $2,480 / $3,265 |
Specifications and Technical Features of the Yamaha Raptor 660
Engine
The Yamaha Raptor 660 has a liquid-cooled, single overhead cam engine with a four-stroke, single-cylinder configuration. Its five-valve cylinder has a bore that measures 100 millimetres (3.94 inches), while its stroke is 84 millimetres (3.31 inches). With a 660-cubic centimetres displacement delivered by two 33-millimetre BS33 Mikuni carburettors. The Raptor 660 boasts a powerful 9.2:1 compression rate, which enables the quad to achieve a top speed of 74 MPH and produce 36 HP.
Fuel
This power mill only runs in unleaded gasoline that contains no more than 10% ethanol. The pump octane number (PON), meanwhile, should be 86 or more, while the research octane number (RON) should be 91 or more. The Raptor 660 has a fuel tank capacity of 12 litres (3.17 US gal) and a reserve of 2.6 L (0.69 US gal).
Lubrication
As a sport quad with a high-performance engine, the Raptor 660 uses Yamalube 4 or any engine oil with SAE 10W-30 or 20W-40. Also, while this four-wheeler requires a total amount of 2.3 litres (2.43 US quarts) of oil, a periodic change would only require you around 1.9 litres (2.01 US quarts), while an oil filter replacement 1.95 litres (2.06 US quarts).
Ignition
This ATV has a push-button starter which offers a lot of convenience. This buff 660 monster has a capacitor discharge ignition (CDI) as its primary starter system, and a mechanical recoil starter that serves as a backup. Moreover, an AC magneto generator provides power to the Raptor 660’s electronic components and operates on a 12 volts, 12 Ah, UB-YTX14-BS battery. As for the spark plug, the Yamaha Raptor 660 uses an NGK DPR8EA-9.
Drivetrain/Transmission
The Yamaha Raptor 660 has a five-speed forward, constant-mesh manual clutch transmission, including a reverse gear. An O-ring drive chain delivers power to the rear wheel with a 13/40 sprocket. Furthermore, the 660 has a 4×2 driveline and can reach a whopping 9,000 HP RPM.
With the primary and secondary reduction ratios being 71/34 (2.088) and 40/13 (3.076), respectively, the gear ratios of the Raptor 660 are as follows:
| Gear Ratios | Values |
| First Gear | 34/14 (2.428) |
| Second Gear | 29/19 (1.526) |
| Third Gear | 26/21 (1.238) |
| Fourth Gear | 22/21 (1.047) |
| Fifth Gear | 19/21 (0.904) |
| Reverse Gear | 28/23×23/16 (1.750) |
Suspension
The 660 sports an independent double-wishbone for its front suspension, while an aluminium swingarm for its rear suspension. The front wheels have 9.1 inches (231.1 millimetres) of travel, ensuring manoeuvrability and reliability when making turns. Meanwhile, the rear wheels have an 8.7-inch (221 millimetres) travel. Also, with a turning radius of 10.8 feet, this quad is not just a speed monster, but it’s also a smooth ride regardless of the trail.
Both suspension systems have an adjustable form preload design, which enables the rider to adjust the vehicle’s height when desired. Moreover, the rear suspension also comes with an adjustable rebound damping system and a compression damping for a smoother and comfortable ride on any type of terrain.
Brakes
This sport quad has dual-disc front brakes, which is operated using the right-hand lever on the handlebar. Apart from that, the Yamaha Raptor 660 single-disc rear brake, which is activated using the right foot lever near the floor bed.
Tyres
This sport ATV is fitted with a pair of AT21 x 7 – 10 KT331 Radial Dunlop front tyres and AT20 × 10 – 9 KT335 Radial Dunlop rear tyres. The recommended tyre air pressure for the front and rear tyres should be 27.5 kPa (0.275 kgf/cm2, 4.0 PSI). Furthermore, the minimum and maximum recommended air pressure for the front and rear tyres should be 24.5 kPa (0.245 kgf/cm2, 3.5 PSI) and 30.5 kPa (0.305 kgf/cm2. 4.4 psi), respectively.
Dimensions
The Yamaha Raptor 660 has a total length of 72 inches (1,830 millimetres), a width of 43.3 inches (1,099.8 millimetres), and a height of 45.3 inches (1,150.6 millimetres). With a ground clearance of 4.5 inches (114.3 millimetres), this quad has a wheelbase of 49 inches (1,244.6 millimetres) and a seat height of 33.9 inches (861.1 millimetres).
Capacity
The dry weight of this sport ATV is measured at 398 lbs (180.5 kilograms). On the other hand, its curb weight—or the overall weight with the gasoline, oil, rider, and accessories included—can reach up to 426 lbs (193 kilograms). In addition, the capacity of the 660’s coolant reservoir is 0.29 litres (0.31 US quarts).
External Features
The Yamaha Raptor 660 comes with a sturdy steel frame with a durable plastic body. This all-terrain speedster also comes complete with hand grips, fenders and bumpers on both the front and rear, as well as a front bash plate and full-length skid plate. It also has footpegs situated at the driver’s location.
Moreover, the 660 has indicator lights situated on the handlebar for the neutral and reverse gears and the warning temperature. It also has a halogen headlight mounted next to the front fenders. The choke button and push-button starter are located on the left handlebar, along with the clutch lever and parking brake. The throttle, on the other hand, is on the right handlebar.
What Makes the Yamaha Raptor 660 Stand Out?
Unlike most ATVs during that period, Yamaha based the Raptor 660’s engine onthe German motorcycle manufacturer, MZ Baghira. This dual-purpose engine design had not been incorporated in any ATV during that time, and this was something that the Japanese company capitalized on.
However, a 660-cc engine requires a lot of space, especially since Yamaha had to add their configurations to it. Thus, they ended up rotating the engine in a forward position and adding some modifications. They also reformulated the designs of some of the cases to make the engine fit inside the frame. Then, with a reinforced clutch that could withstand the power and traction force of the engine. This was how the Yamaha Raptor 660 came to be.
The moment this all-terrain vehicle stole the spotlight, it became an instant hit among ATV enthusiasts, prompting the 660 to earn the title of Sport ATV of the Year. Apart from its power, people loved its versatility on the track, as well as its reliability in terms of responsiveness and manoeuvrability. The Raptor 660 was in a league of its own, thanks to its hefty and unique engine design. And, for certain, the competition was taken by surprise!
After the competition had come up with their badass quads, the 660 had already raked in all the sales and the credit, making it one of the most-favoured ATVs of all time. During that point, it would only take a few summers before the Raptor 660 raced down into the sunset as Yamaha released the bigger and badder Raptor 700.
What Are the Pros and Cons of the Yamaha Raptor 660?
The Yamaha Raptor 660 is a terrific speed beast that has created lots of waves and noise ever since its inception into the market. The 660’s off-the-charts performance paved its way to becoming a crowd favourite during its time. However, despite its awesome delivery, it’s not all rainbows and butterflies for this quad. While there are some areas that this quad has not met, the Raptor sure has nailed several sweet spots, especially for a top-billed ATV like the 660.
Pros
Power and Speed
There’s no wonder that the Raptor 660 was built for speed. With 74 MPH under its belt, this quad is second to the Banshee when it comes to top speed, bone stock. Moreover, thanks to its engine configuration, the power that comes from this ATV is impressive as it clocks in at 36 HP. Coupled with the quad’s all-terrain capability—that is, whether you’re taking it on a dirt track, hardpack, dunes, or even on grassy hills, the 660’s definitely going to give a heck of a ride.
Incredible Handling and Responsiveness
To say that the Yamaha Raptor 660 has an amazing suspension is an understatement. This four-wheeler turns perfectly even in corners or any challenging terrain, which makes it an ideal ride on any type of trail. Though several Raptor owners would attest that the 660 is at its best in the dunes, this off-roader proves that it’s a versatile, reliable machine that packs a lot of fun.
Remarkable Performance Even in Stock
When it comes to power quads, the Yamaha Raptor 660 is among one of the ATVs out there that’s fun to take on a race track even if it’s not modded. In fact, competition-wise and stock-to-stock, Raptor 660 can perform well against other well-known ATVs like the Can-Am Bombardier DS or Honda FourTrax 400EX. This one mighty aspect of the 660 is a testament to its awesome power and its impressive and exemplary engine design.
Great Ergonomics
What’s amazing about the Yamaha Raptor 660 is that its designers took into consideration this department to give the owners a smooth ride. The push-button starter design is a convenient way of bringing the 660 to life. The handlebars are of the right height with the seat that it’s just perfect for both big or smaller riders alike.
Additional Pros:
- Perfect ATV for trail riders
- Great for performing wheelies and power slides
- Sleek and sporty yet rugged look add to its aesthetic, which is attributed to its external design
- Unbelievable agility, power, and manoeuvrability
Cons
Starter Clutch Issues
Some owners have complained about problems with the starter clutch or the one-way bearing in the 2001 to 2003 Raptor 660s. The reason behind this malfunction is that the starter clutch is also moving in the opposite direction when it shouldn’t—hence, its other name. The starter clutch is one of the most important components in a quad because it cranks the engine in a forward direction.
Veteran Raptor 660 users recommend replacing a defective starter clutch immediately, as this dysfunctional component would give you problems later on. The constant movement could grind down whatever bit and piece of material that’s fallen off and that could get sucked into the oil sump—that could lead to a whole lot of dilemma. In case you have this problem, get an L&A or L&L starter clutch kit. Also, replacing the 52T gear would be necessary if you plan on installing a new starter clutch.
Problems with the Transmission
Though a quality sport ATV through and through, several 660 owners complained about the Yammie experiencing transmission issues, especially when going into second gear. This defect, which transpired in 2001 and 2002 models, caused serious concerns among owners, particularly those with brand new units. This unprecedented malfunction forced Yamaha to modify the gearbox, resolving the issue permanently afterwards.
Additional Cons:
- Some aggressive riders find the seat height rather high for their liking.
- Not a beginner-friendly ATV
- Susceptible to cold-start issues
- Because of its overall weight, it’s not advisable to ride the quad all day long.
What Are the Different Ways to Mod a Yamaha Raptor 660?
Adding modifications to a quad can help up its value by the dozen, especially if it is a powerful four-wheeler like the Yamaha Raptor 660. Apart from that, it also makes a great ride no matter the trail. If you’re looking forward to modding your 660, the following tips could offer you some much-needed help:
- Upgrading the Engine
Let’s face it, a monster machine like the Raptor 660 is a quad that’s not difficult to put upgrades on. Therefore, raising the bar a bit higher in terms of displacement might give you a better, faster ride. In that case, replacing the stock engine with a 686-cubic centimetre quad could turn your 660 into a powerful vehicle, with lots of torque and acceleration.
You may even add in some quality K&N air filters, carb jet kits, as well as Stage 1 slip-on exhausts. These components could do wonders on your machine and add some sweet HP into your engine. You may also get creative with your upgrades and check for some wonderful kits online. As the saying goes: the sky’s the limit!
- External Components
While the stock Raptor 660 already looks radical, cranking the notch a bit higher by customizing its appearance does not just sound fun, it’s also awesome. Some of the aftermarket external components that you can find either online or from dealerships are as follows:
- Handlebars
Replacing the stock with custom bars is one of the few things that experienced ATV enthusiasts do to their quads. Not only would that put some personal touch to your quad, but that you’re also assured that you have a more badass and sturdier aftermarket stick sitting in front of you. Finding quality handlebars whether online or in dealerships would be a breeze, so you don’t have to worry about getting one.
- Brake Pedal
If you think the brake pedal on the Raptor 660 seems floppy, then you are not alone. Getting an aftermarket replacement isn’t much of a challenge as long as it provides that aesthetic to it, no matter how small.
- Tyres
Traction is one of the first factors that you want to add to your raptor 660. For that matter, getting a new set of quality tyres would be a clever idea, especially if you have a second-hand model with stock tyres.
With that said, you would be wise to figure out which treads you should mount on your ATV since the aggressive ones provide more traction. Additionally, when it comes to size, you can stick to 21/20 in the front and rear, respectively, or go up to 22/20.
About the Manufacturer
Yamaha Motor Co., Ltd. is a multinational company that manufactures motorcycles and other motorised products, such as motorboats, tractors, snowmobiles, recreational vehicles and more. A branched-out motorcycle division of the Yamaha Corporation, this Japanese firm was established in 1955 and has become a respected name in the automotive industry ever since. The Yamaha Raptor 660 is one of the many triumphs Yamaha has ever achieved. As one of the world leaders in automobile production, Yamaha finds new and exciting ways in making life convenient for everyone.
Final Takeaway — Yamaha Raptor 660
Despite its short run, the continuing legacy that the Yamaha Raptor 660 has left behind turned this quad into a legend in more ways than anyone could imagine. The 660 symbolises audacity and innovation and has become the epitome of power and grace. This quad has set the bar in terms of performance and design.
Despite its flaws, the Raptor 660 did not just exceed the expectations of every quad enthusiast, but it also lived up to the hype as the ‘sport quad king.’ With that said, we believe this all-terrain beast is worth having and—if you are planning on getting one—worth buying. Besides, the mods and upgrades are all worth it. So ride on and enjoy!
