The 2001 Yamaha YFM660, often referred to as the Grizzly 660, is a popular utility ATV that entered the market to compete with other high-displacement models. Produced from 2001 through 2008, it typically featured a single body style with various trims often distinguished by color options and accessory packages. At its launch, pricing was generally in the $7,000-$8,000 range. Its enduring popularity stems from its robust engine, comfortable ride, and impressive off-road capabilities, making it a go-to for both work and recreation.
The Good
The 2001 Yamaha YFM660 boasts a powerful engine delivering strong performance, renowned Yamaha reliability for peace of mind, and a comfortable, stable ride. Its rugged design inspires confidence, offering excellent value for its capabilities, appealing to both the thrill-seeker and the pragmatic owner.
The Bad
Common concerns for the 2001 Yamaha YFM660 include potential issues with the automatic transmission (CVT) belt and clutch, carburetor performance in extreme conditions, and some electrical component failures. Owners should also watch for rust on the frame and suspension components due to exposure.
2001 Yamaha YFM660: Quick Overview
- Engine Options: Single-cylinder, 4-stroke, liquid-cooled, SOHC, 5-valve
- Displacement: 660cc
- Horsepower: Approximately 45-48 hp (estimated based on similar models of the era)
- Fuel Economy: Varies significantly with riding style and terrain, typically around 15-20 mpg. Specific EPA estimates are not readily available for ATVs.
- 0-60 Times: Not a standard metric for ATVs. Acceleration is strong and suitable for off-road use.
- Towing Capacity: 1,322 lbs (600 kg)
- Payload Capacity: 286 lbs (130 kg)
- Transmission: Yamaha Constant Velocity (CVT) automatic transmission with high/low range and reverse.
- Drivetrain: 4WD with on-demand front differential lock.
- Suspension: Independent front suspension with 6.5 inches of travel; independent rear suspension with 7.1 inches of travel.
- Brakes: Dual hydraulic disc front brakes; sealed hydraulic disc rear brake.
- Tires: Front: AT25x8-12; Rear: AT25x10-12.
- Ground Clearance: 10.6 inches (269 mm)
- Fuel Capacity: 4.2 US gallons (16 liters)
- Key Trim-Level Features (for the 2001 model year, variations might exist): Standard models typically included electric start, digital instrumentation, and a heavy-duty front bumper. Higher-end options or later model year packages might have included different color schemes, upgraded tires, or specialized racks. The core features remained consistent for the utility-focused Grizzly 660.
2001 Yamaha YFM660 Specifications
Vehicle Information
| Year | 2001 |
| Make | Yamaha |
| Model | YFM660 |
| Trim | - |
| Style | - |
| Type | Motorcycle |
| Category | Low Speed Vehicle |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | KAKEGAWA |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 660CC |
| Engine Size | 660L |
| Engine Cylinders | 1 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | Rear-Wheel Drive |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 2001 Yamaha YFM660 Have?
The 2001 Yamaha YFM660, while generally a reliable machine, has a few commonly reported issues that owners should be aware of. One of the most frequent concerns revolves around the Continuously Variable Transmission (CVT) system. Owners have reported premature wear of the drive belt, and in some cases, clutch issues that can lead to a loss of power or an inability to engage drive. This is often exacerbated by aggressive riding or inadequate maintenance. Another area of concern is the carburetor. While designed for performance, it can be sensitive to altitude changes and can sometimes develop clogging issues over time, affecting fuel delivery and overall engine performance. Proper cleaning and adjustment are often required. Some electrical gremlins have also been noted, including faulty ignition coils or stator problems, which can lead to starting issues or intermittent power loss. These can be more prevalent on older units that have seen significant use. Water intrusion into electrical components is also a potential issue if the ATV is operated in deep water without proper precautions. Regarding specific model year issues for the 2001 YFM660, there aren't widespread, model-year-specific recalls that stand out as major design flaws. However, the general areas of concern like the CVT belt wear and carburetor sensitivity were present throughout its production run. Long-term reliability is generally good, provided the vehicle receives regular and thorough maintenance. This includes oil changes, air filter cleaning/replacement, spark plug maintenance, and regular inspection of the CVT belt and clutches. Neglecting these can significantly shorten the lifespan of these components. It's also worth noting that the frame and suspension components, while robust, can be susceptible to rust and corrosion, especially if used in wet or salty environments and not properly cleaned and protected afterward. Owners should inspect these areas for any signs of significant wear or damage.
How long will the 2001 Yamaha YFM660 last?
Estimating precise mileage for an ATV like the 2001 Yamaha YFM660 is challenging, as many are not equipped with odometers or are used in environments where mileage is less of a primary indicator than hours of operation. However, with diligent maintenance, owners can expect to get 10-15 years or more of service from a YFM660. Many are still actively used and enjoyed after 20 years. Long-term durability is a strong suit for Yamaha, and the YFM660's core engine and drivetrain are built to last. The weaknesses that emerge over time, as mentioned, are typically related to wear items like the CVT belt and clutches, suspension bushings, and potential electrical component aging. Regular servicing is crucial. A well-maintained YFM660 can easily surpass 10,000 hours of operation, but neglected machines can see significant component failures much sooner.
What Technology & Safety Features are Included?
The 2001 Yamaha YFM660 is a utility-focused ATV, and as such, its technological and feature set reflects practicality over luxury or advanced driver aids. Built-in Tech: The primary technological feature is the electric start, a significant convenience for an ATV of this era. Instrumentation is typically digital, offering readouts for speed, odometer, trip meter, and a fuel gauge. Some models might have included a clock and various indicator lights for 2WD/4WD engagement, neutral, and oil pressure. Entertainment: As an off-road utility vehicle, dedicated entertainment systems like radios or audio players are not standard features on the 2001 YFM660. Owners would typically add aftermarket solutions if desired. Driver-Assistance Features: Advanced driver-assistance systems are non-existent on the 2001 Yamaha YFM660. The focus is on fundamental mechanical operation. Features like limited-slip differentials or advanced traction control are not present. The 'on-demand' 4WD system with a locking front differential is its primary off-road capability enhancement. Safety Features: Safety is primarily addressed through its robust chassis design, independent suspension for stability, and reliable hydraulic disc braking system on all wheels. The YFM660 was equipped with hand guards for rider protection and typically featured a comfortable and secure seating position. As an ATV, it does not undergo traditional crash-testing like passenger vehicles, and therefore, there are no published crash-test ratings available. Safety is largely dependent on rider skill, adherence to safe operating practices, and the use of appropriate protective gear. Optional features from the factory or aftermarket could have included winches, enhanced lighting, or different storage solutions, but these did not typically involve advanced technology.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
2001 Yamaha YFM660 Prices and Market Value
When new, the 2001 Yamaha YFM660 Grizzly was priced in the range of $7,000 to $8,000 USD, depending on the specific trim or any dealer add-ons. As a used vehicle, its resale value remains surprisingly strong due to Yamaha's reputation for reliability and the YFM660's proven off-road performance. Current used market prices typically range from $2,000 to $5,000, heavily influenced by condition, mileage (or hours), maintenance history, and the presence of aftermarket accessories. ATVs tend to depreciate less rapidly than cars if well-maintained and kept in good working order. Factors significantly affecting resale value include cosmetic condition, engine and transmission health, tire wear, and any modifications made. A clean, original, and well-cared-for YFM660 will always command a higher price.
2001 Yamaha YFM660 Cost of Ownership
Owning a 2001 Yamaha YFM660 is generally considered economical, especially compared to other recreational vehicles. Insurance costs are typically low, often covered under homeowner's or specialty ATV policies. Fuel consumption is moderate, averaging around 15-20 mpg. Routine maintenance, including oil changes, filter replacements, and periodic CVT belt checks, is essential and relatively inexpensive. Repair costs can vary; while many parts are readily available and affordable, significant component failures, like a CVT rebuild, can be more costly. Overall, with regular maintenance, the YFM660 is a durable and cost-effective machine to own.
2001 Yamaha YFM660 Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2001 Yamaha YFM660 Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
2001 Yamaha YFM660 Insurance
Insurance for a 2001 Yamaha YFM660 is moderately priced, reflecting its status as a Motorcycle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2001 Yamaha YFM660 Compare to Other Motorcycle?
The 2001 Yamaha YFM660 Grizzly was a top-tier utility ATV, competing fiercely with models like the Honda Foreman, Suzuki King Quad, and Polaris Sportsman of the same era. In terms of performance, the YFM660's 660cc engine offered a significant power advantage over many 500cc-class competitors, providing robust torque for hauling and excellent acceleration for trail riding. Its liquid cooling system also contributed to consistent performance under load. Regarding features, the YFM660 stood out with its on-demand 4WD system and locking front differential, a highly sought-after feature for serious off-roading. Independent suspension on all four wheels provided a comfortable and capable ride, often surpassing the solid rear axles found on some rivals. Reliability is where Yamaha consistently shines. While all ATVs can have issues, Yamaha generally has a reputation for building exceptionally durable machines. The YFM660 inherited this legacy, with many units still running strong decades later, often outlasting competitors in terms of long-term engine and drivetrain longevity. In terms of price, the YFM660 was typically positioned at the higher end of the utility ATV market when new, reflecting its premium features and performance. Used prices remain competitive, often holding their value well. Similar Alternatives: The Honda Foreman 450/500 and the Suzuki King Quad 700 (which arrived shortly after the 2001 YFM660) are direct competitors. The Foreman is known for its legendary Honda reliability and simpler, rugged design, often at a slightly lower price point but sometimes with less advanced suspension or power. The King Quad 700 offered a larger engine and similar feature set but might have had a slightly less established reliability record in its early years compared to Yamaha or Honda. Better Alternatives: If seeking more modern technology, features like fuel injection, power steering, or advanced electronics, one would need to look at newer model years or different ATV classes. However, for a robust, capable, and relatively affordable used utility ATV, the 2001 Yamaha YFM660 remains an excellent choice and a benchmark for its class.
Final Verdict: Is the 2001 Yamaha YFM660 a Good Motorcycle?
The 2001 Yamaha YFM660 Grizzly is ideal for riders seeking a powerful, reliable, and capable utility ATV for work, hunting, trail riding, or recreational use. It's particularly well-suited for those who value robust performance, true 4WD capability, and a comfortable ride over complex electronic features. Given its age, buying new is not an option. The YFM660 is definitely worth buying on the used market if a well-maintained example can be found. Conditions that make it a good purchase include a thorough pre-purchase inspection focusing on the CVT system, engine health, and suspension components. Trims are less critical than overall condition. A meticulously maintained 2001 Yamaha YFM660 remains a fantastic value and a dependable off-road companion.
Eugene S
Eugene is an automotive enthusiast with over 15 years of experience in the used car market. As a writer at VINCheck.info, he brings deep industry insight and a passion for cars, helping readers make smart, informed decisions. Eugene has written hundreds of used car reviews and is known for breaking down complex automotive topics into clear, actionable advice. Over the years, he has driven and worked on a wide range of vehicles—starting with tuning street cars in his early days and eventually focusing on performance upgrades and reliability improvements. Today, he specializes in evaluating used vehicles through the lens of real-world ownership and enthusiast needs. A longtime fan of Porsche, Eugene especially appreciates vehicles that blend durability with driving enjoyment.