Yamaha YFM66FGW Grizzly 660 2007 Owner's Manual

Yamaha YFM66FGW Grizzly 660 2007 manual cover

Pages 176

Year 2007

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Yamaha YFM66FGW Grizzly 660 2007 Specification

The 2007 Yamaha YFM66FGW Grizzly 660 is a robust and versatile ATV designed for both utility and recreational use. It is powered by a liquid-cooled, four-stroke, single-cylinder engine with a displacement of 660cc. The engine features a SOHC (Single Overhead Cam) configuration and is equipped with Yamaha’s Ultramatic V-belt transmission, offering seamless automatic shifting and an efficient engine braking system. The transmission provides a high and low range, as well as reverse, facilitating versatile performance across various terrains.

The Grizzly 660 boasts an independent double-wishbone suspension system on both the front and rear, with five-way preload-adjustable shocks, ensuring a smooth ride and excellent handling. The front suspension travel measures 7.1 inches, while the rear suspension travel is 9.5 inches. The ATV is fitted with hydraulic dual discs in the front and a sealed, oil-bathed multi-disc brake system in the rear, delivering reliable stopping power.

With a fuel capacity of 5.3 gallons, including a 0.92-gallon reserve, the Grizzly 660 offers extended ride durations. It features a digital instrument panel providing essential information such as speed, fuel level, and trip distance. The ATV also includes a standard front-mounted winch, utility racks with a combined carrying capacity of 264 pounds, and a towing capacity of up to 1,212 pounds, making it ideal for heavy-duty tasks.

The Grizzly 660's overall dimensions are 81.1 inches in length, 45.3 inches in width, and 48.8 inches in height, with a seat height of 34.6 inches and a ground clearance of 11.8 inches. Weighing in at 600 pounds, this ATV is built for durability and is designed to handle challenging environments with ease. The 2007 Yamaha YFM66FGW Grizzly 660 stands out as a powerful, reliable, and feature-rich ATV suited for a wide range of applications.

Yamaha YFM66FGW Grizzly 660 2007 F.A.Q.

How do I perform regular maintenance on my Yamaha YFM66FGW Grizzly 660 2007?

Regular maintenance includes checking and changing the oil, inspecting the air filter, checking the brakes, and ensuring the tires are properly inflated. It's also important to regularly inspect the drive chain and suspension components for wear and tear.

What should I do if my Yamaha Grizzly 660 won't start?

First, check the battery to ensure it's charged and the terminals are clean. Next, inspect the fuel lines for blockages and ensure there's enough fuel. If the issue persists, check the spark plug for wear or damage.

How can I improve the fuel efficiency of my Grizzly 660?

To improve fuel efficiency, ensure the air filter is clean, maintain proper tire pressure, and perform regular engine tune-ups. Avoid carrying unnecessary weight and use smooth throttle control.

What type of oil is recommended for a Yamaha Grizzly 660?

Yamaha recommends using a 4-stroke engine oil that meets or exceeds the JASO MA standard, such as Yamalube 4, for optimal performance and protection.

How often should I change the oil in my Grizzly 660?

It is recommended to change the oil every 20 hours of operation or every 100 miles, whichever comes first. Additionally, change the oil filter with every oil change.

What are common issues with the Yamaha Grizzly 660's transmission?

Common issues include difficulty shifting gears and unusual noises. These can often be resolved by checking the transmission fluid levels and ensuring the linkage is properly adjusted.

How can I troubleshoot overheating problems in my Grizzly 660?

Check the coolant level and ensure the radiator fins are clean and unobstructed. Inspect the thermostat and radiator cap for proper operation. If the problem persists, the water pump may need to be checked.

What is the correct tire pressure for the Yamaha Grizzly 660?

The recommended tire pressure is 5 psi for the front tires and 5 psi for the rear tires. Always check the pressure when the tires are cold for an accurate reading.

How do I adjust the carburetor on my Grizzly 660?

To adjust the carburetor, start by setting the idle speed screw to the recommended RPM. Then, adjust the air-fuel mixture screw until the engine runs smoothly. It's best to refer to the service manual for specific instructions.

What are the torque specifications for the Yamaha Grizzly 660's engine components?

Torque specifications vary by component. For example, the cylinder head bolts should be torqued to 32 ft-lb. It's crucial to refer to the service manual for a complete list of specifications.