The Ultimate Guide to the Yamaha Raptor 660 Motor
The Yamaha Raptor 660 is a renowned all-terrain vehicle (ATV) that has captured the hearts of enthusiasts since its inception. With its powerful engine, impressive specs, and robust design, it’s no surprise that the Raptor 660 remains a favorite among riders. This guide aims to provide an in-depth look at the Raptor 660 motor, covering everything from performance upgrades to engine specifications, making it the ultimate resource for both new and seasoned riders.
Comparison Table: Yamaha Raptor 660 Motor Applications
| Motor Type | Displacement | Horsepower | Compression Ratio | Warranty Options | Typical Applications |
|---|---|---|---|---|---|
| Stock Engine | 660cc | 36 HP | 10.75-1 to 12-1 | 1-year standard, 2-year for $450 | Recreational riding, casual racing |
| Performance Kit | 660cc | Varies | Customizable | Depends on supplier | Racing, competitive events |
| Big Bore Rebuild Kit | 686cc/719cc | Varies | Up to 12-1 | Typically 1 year | High-performance racing |
| Complete Rebuild | 660cc | Same as stock | Stock | 1-year standard | Restoration, everyday use |
Understanding the Yamaha Raptor 660 Engine
Engine Specifications
The Yamaha Raptor 660 features a 660cc, four-stroke, liquid-cooled engine. This powerful engine is designed to deliver robust performance, making it a popular choice for off-road enthusiasts. With a five-valve design, the engine includes three intake and two exhaust valves, allowing for optimal airflow and efficient combustion.
Key Features
- Displacement: 660cc
- Horsepower: 36 HP
- Top Speed: Approximately 74 MPH
- Weight: 398 pounds
- Fuel System: 2 x 32mm carburetors
These specifications provide a solid foundation for performance, but many riders opt for upgrades to enhance power and efficiency.
Performance Upgrades
Engine Kits
Performance kits for the Raptor 660 can significantly enhance its capabilities. For example, Duncan Racing offers complete engine performance packages that include:
- Fat Boy 4 Complete Exhaust System
- 660cc Forged JE Piston Kit
- Upgraded Camshaft Options
These kits are designed for riders looking to boost their ATV’s power output for competitive racing or more aggressive riding styles. The hardfaced camshafts are a reliable choice, providing durability and increased performance.
Big Bore Kits
Big bore kits, such as those available from BPRATV, allow for increased displacement (up to 719cc) and improved performance. These kits typically include:
- Aftermarket big bore cylinder
- Forged pistons
- High-temperature piston rings
These upgrades can lead to a noticeable increase in horsepower and torque, making the Raptor 660 even more thrilling to ride.
Common Issues and Maintenance
Engine Reliability
The Raptor 660 is generally known for its reliability, but like any machine, it requires regular maintenance. Common issues include:
- Overheating: Ensure the cooling system is functioning correctly.
- Oil Leaks: Regularly check for leaks and maintain oil levels.
- Carburetor Issues: Keep the carburetors clean to prevent performance issues.
Regular inspections and maintenance will help keep the engine running smoothly.
Rebuild Kits
For those looking to restore their Raptor 660 to peak performance, complete rebuild kits are available. These kits often include:
- Gaskets and seals
- Pistons and rings
- Cylinder head components
Rebuilding the engine can extend the life of the ATV and improve overall performance.
Technical Features Comparison
| Feature | Stock Engine | Performance Kit | Big Bore Kit | Complete Rebuild |
|---|---|---|---|---|
| Displacement | 660cc | 660cc | 686cc/719cc | 660cc |
| Horsepower | 36 HP | Varies | Varies | Same as stock |
| Compression Ratio | 10.75-1 to 12-1 | Customizable | Up to 12-1 | Stock |
| Warranty | 1-year | Varies | 1-year | 1-year |
| Ideal Use | Recreational | Racing | Competitive | Restoration |
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Conclusion
The Yamaha Raptor 660 motor is a powerful and versatile engine that offers riders a thrilling experience on and off the trails. Whether you’re looking to maintain your vehicle, enhance performance with upgrades, or consider a complete rebuild, understanding the capabilities and options available for the Raptor 660 is crucial. With its impressive specifications and a wide range of aftermarket support from companies like www.rev6sports.com and www.duncanracing.com, the Raptor 660 remains a top choice for ATV enthusiasts.
FAQ
What is the top speed of the Yamaha Raptor 660?
The top speed is approximately 74 MPH, depending on various factors such as rider weight, surface type, and modifications.
How much horsepower does the Raptor 660 produce?
The stock Raptor 660 engine produces around 36 horsepower.
What are the benefits of performance kits?
Performance kits can enhance horsepower, torque, and overall engine responsiveness, making them ideal for racing and aggressive riding.
What is a big bore kit?
A big bore kit increases the engine’s displacement, allowing for more power and torque, typically resulting in improved acceleration and performance.
How often should I maintain my Raptor 660?
Regular maintenance is recommended every 50 hours of use or annually, whichever comes first. This includes oil changes, filter checks, and carburetor cleaning.
Can I rebuild my Raptor 660 engine myself?
Yes, many enthusiasts choose to rebuild their engines using complete rebuild kits, but it requires mechanical knowledge and proper tools.
What types of fuel should I use for the Raptor 660?
Using high-octane fuel is recommended for optimal performance, especially if modifications have been made to the engine.
Is there a warranty available for Raptor 660 engines?
Yes, warranties typically cover one year, with some aftermarket suppliers offering extended warranties for an additional fee.
What common issues should I look out for?
Common issues include overheating, oil leaks, and carburetor malfunctions. Regular maintenance can help prevent these problems.
Where can I find replacement parts for the Raptor 660?
Replacement parts can be found through various online retailers such as www.bpratv.com and www.webbikeworld.com, as well as local ATV shops.
