Yamaha YFM66FGX Grizzly 660 2008 Owner's Manual

Yamaha YFM66FGX Grizzly 660 2008 manual cover

Pages 180

Year 2008

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Yamaha YFM66FGX Grizzly 660 2008 Specification

The Yamaha YFM66FGX Grizzly 660, model year 2008, is a robust all-terrain vehicle (ATV) designed for both recreational and utility purposes. It features a liquid-cooled, 4-stroke, single-cylinder engine with a displacement of 660cc, ensuring powerful performance and reliability across various terrains. The engine is equipped with a 4-valve SOHC (Single Overhead Camshaft) configuration, enhancing efficiency and power output.

The transmission system is an Ultramatic V-belt with an all-wheel engine braking system, which provides seamless shifting and superior control, especially on steep descents. The Yamaha Grizzly 660 also includes a fully automatic transmission with high, low, neutral, reverse, and park gears, making it user-friendly for riders of all experience levels.

Suspension-wise, the ATV comes with independent double wishbone setups for both front and rear, offering excellent handling and a smooth ride over uneven ground. The front suspension has 5-way preload-adjustable shock absorbers, while the rear suspension features a 5-way preload-adjustable single shock. This ensures optimal comfort and stability.

Braking is handled by dual hydraulic discs at the front and a sealed, oil-bathed, multi-disc system at the rear, providing reliable stopping power in various conditions. The Grizzly 660 also boasts a comprehensive digital instrument panel that displays essential information such as speed, odometer, trip meter, and fuel gauge.

With a fuel capacity of 20 liters (5.3 gallons), the Grizzly 660 is built for extended adventures. The ATV's overall dimensions are 2,075mm in length, 1,150mm in width, and 1,240mm in height, with a wheelbase of 1,285mm. The ground clearance is 285mm, enabling it to tackle rough and uneven terrain with ease. The dry weight of the vehicle stands at approximately 272 kg (600 lbs), ensuring a balance between sturdiness and maneuverability.

In summary, the Yamaha YFM66FGX Grizzly 660 2008 is a versatile and reliable ATV, equipped with advanced features to ensure a powerful, smooth, and user-friendly riding experience.

Yamaha YFM66FGX Grizzly 660 2008 F.A.Q.

How do I perform regular maintenance on my Yamaha YFM66FGX Grizzly 660 2008?

To perform regular maintenance, check and change the engine oil, replace the oil filter, inspect the air filter, tighten any loose bolts, lubricate the pivot points, and inspect the brakes and tires for wear. Refer to the owner's manual for specific intervals and instructions.

What type of oil should I use for my Yamaha Grizzly 660?

For the Yamaha Grizzly 660, use 10W-40 or 20W-50 4-stroke engine oil that meets JASO MA standards. Yamaha's own Yamalube is recommended, but any oil meeting these specifications should suffice.

How can I troubleshoot starting issues with my Grizzly 660?

If your Grizzly 660 won't start, check the battery for charge, inspect the spark plug for wear, ensure the fuel is fresh, and verify that the kill switch is in the correct position. If problems persist, consult a professional mechanic.

What should I do if my Grizzly 660 is overheating?

If your Grizzly 660 is overheating, check the coolant level and top it up if necessary. Inspect the radiator for blockages and clean if needed. Ensure the fan is functioning correctly. If overheating continues, seek professional assistance.

How do I adjust the carburetor on my Grizzly 660?

To adjust the carburetor, locate the air/fuel mixture screw and idle speed screw. Adjust the air/fuel mixture screw for optimal engine performance and smooth idling. Adjust the idle speed screw to set the idle to approximately 1450-1500 RPM. Consult the service manual for detailed instructions.

What are the common electrical issues with the Yamaha Grizzly 660 and how to fix them?

Common electrical issues include battery drainage, faulty ignition switch, and blown fuses. Check the battery connections, test the ignition switch for continuity, and replace any faulty fuses. Clean all connectors and apply dielectric grease to prevent corrosion.

How often should I replace the spark plug on my Grizzly 660?

Replace the spark plug every 6,000 miles or 10,000 kilometers, or more frequently if the engine is misfiring or running poorly. Use a spark plug that meets the specifications in the owner's manual.

What tire pressure should I maintain for my Yamaha Grizzly 660?

Maintain a tire pressure of 5 psi (34 kPa) for the front tires and 5.5 psi (38 kPa) for the rear tires. Always check tire pressure when the tires are cold for accurate readings.

How do I properly store my Grizzly 660 for the winter?

To store your Grizzly 660 for the winter, clean it thoroughly, change the oil and filter, fill the fuel tank and add a fuel stabilizer, disconnect the battery, and cover it with a breathable cover. Store in a dry place away from direct sunlight.

What should I do if my Grizzly 660 has poor acceleration?

If your Grizzly 660 has poor acceleration, check the air filter for blockages, inspect the carburetor for adjustments, and ensure the drive belt is in good condition. Clean or replace components as necessary and consult a professional if issues persist.