The Yamaha Raptor 660 is a legendary ATV, known for its raw power and aggressive handling. But for those seeking even more performance, a big bore kit offers a significant upgrade. This comprehensive guide delves into everything you need to know about Raptor 660 big bore kits, helping you make an informed decision and safely unleash the beast within your machine.
What is a Raptor 660 Big Bore Kit?
A Raptor 660 big bore kit essentially increases the engine's displacement, resulting in a substantial power boost. This is achieved by replacing the standard cylinder and piston with larger components, increasing the engine's bore (diameter). Kits typically include all necessary parts for installation, including the cylinder, piston, rings, gaskets, and sometimes even upgraded connecting rods or crankshafts depending on the kit's specifications. The increase in displacement translates directly to more torque and horsepower, leading to improved acceleration, top speed, and overall performance.
What are the Benefits of a Raptor 660 Big Bore Kit?
The benefits extend beyond a simple power increase. Here’s a breakdown:
- Increased Horsepower and Torque: This is the primary advantage, offering significantly improved acceleration and hill-climbing capabilities.
- Enhanced Performance: Experience a noticeable improvement in overall responsiveness and power delivery across the RPM range.
- Improved Top Speed: A larger displacement engine translates to a higher potential top speed.
- Increased Fun Factor: The noticeable performance gains make riding more exhilarating and enjoyable.
What are the Different Types of Raptor 660 Big Bore Kits?
Several manufacturers offer big bore kits, each with varying specifications and price points. Some kits offer only a slight increase in displacement, while others significantly increase the engine's size. The choice depends on your budget, riding style, and desired performance level. It's crucial to research reputable manufacturers and choose a kit that suits your needs and the quality of your machine. Look for kits with a good reputation for quality and reliability.
What are the Potential Drawbacks of a Raptor 660 Big Bore Kit?
While the benefits are compelling, it’s important to consider the potential downsides:
- Increased Wear and Tear: A larger engine produces more stress on various components, potentially leading to increased wear and tear. Regular maintenance becomes crucial.
- Increased Fuel Consumption: Expect slightly higher fuel consumption compared to the stock engine.
- Cost: Big bore kits are a significant investment. The cost includes the kit itself, professional installation (recommended), and potential upgrades to other engine components for optimal performance and longevity.
- Potential for Damage: Improper installation or using low-quality components can damage the engine, leading to costly repairs.
How Much Does a Raptor 660 Big Bore Kit Cost?
The price varies considerably depending on the manufacturer, the size of the bore increase, and the included components. Expect to pay anywhere from several hundred dollars to well over a thousand dollars for a complete kit. Remember to factor in the cost of installation, which is often best left to experienced mechanics.
Do I Need to Modify Other Components After Installing a Big Bore Kit?
Yes, installing a big bore kit often necessitates modifications to other components to ensure optimal performance and reliability. These might include:
- Upgraded Air Intake: A larger displacement engine requires more air, so an upgraded air filter or intake system is often necessary.
- Exhaust System: A free-flowing exhaust system is essential to prevent backpressure and maximize the benefits of the larger engine.
- Jetting/Fueling Adjustments: The carburetor or fuel injection system needs adjustment to deliver the correct fuel-air mixture for the increased displacement. Incorrect jetting can severely damage the engine.
- Clutch Upgrade: The stock clutch may not be able to handle the increased torque and may require upgrading for reliability and performance.
How Difficult is it to Install a Raptor 660 Big Bore Kit?
Installing a big bore kit is a complex procedure requiring mechanical expertise. It's generally recommended to have a professional mechanic with experience working on ATV engines perform the installation. Attempting the installation yourself without the necessary skills and tools could result in engine damage.
Where Can I Buy a Raptor 660 Big Bore Kit?
Various online retailers and ATV parts specialists sell big bore kits for the Raptor 660. However, it's essential to research and choose reputable suppliers known for selling quality products. Read reviews carefully before making a purchase.
This guide provides a comprehensive overview of Raptor 660 big bore kits. Remember, careful planning, research, and professional installation are essential for a successful and safe upgrade. Enjoy the enhanced power and performance!
