Yamaha YFM25BX Big Bear 250 2008 Owner's Manual

Yamaha YFM25BX Big Bear 250 2008 manual cover

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Year 2008

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Yamaha YFM25BX Big Bear 250 2008 Specification

The Yamaha YFM25BX Big Bear 250 for the year 2008 is a mid-sized all-terrain vehicle (ATV) designed for both utility and recreational purposes. It is equipped with a 249cc air-cooled, SOHC, four-stroke engine that delivers reliable performance and efficiency. The engine is paired with a five-speed transmission that includes an automatic clutch, making it user-friendly for both novice and experienced riders. The Big Bear 250 features a robust steel frame and a double wishbone front suspension with 5.7 inches of travel, complemented by a swingarm rear suspension that offers 5.9 inches of travel, ensuring a smooth ride over various terrains.

The ATV's braking system consists of dual hydraulic front disc brakes and a sealed drum rear brake, providing dependable stopping power under diverse conditions. The Big Bear 250 rides on 22-inch tires mounted on durable steel wheels, enhancing its stability and traction. With a fuel capacity of 3.2 gallons, including a 0.7-gallon reserve, it is designed for extended use without frequent refueling.

Ergonomically, the Yamaha YFM25BX Big Bear 250 features a comfortable seat and handlebars that are positioned to reduce rider fatigue. The ATV also includes a digital instrument panel that provides essential information at a glance. Additional practical features include front and rear cargo racks, offering a combined load capacity of up to 165 pounds, making it suitable for hauling equipment or supplies. The overall design of the Yamaha YFM25BX Big Bear 250 emphasizes durability, ease of use, and versatility, making it a reliable choice for a wide range of outdoor activities.

Yamaha YFM25BX Big Bear 250 2008 F.A.Q.

How do I change the oil on my Yamaha YFM25BX Big Bear 250 2008?

To change the oil, warm up the engine, place an oil pan beneath the engine, remove the drain plug, and let the old oil drain completely. Replace the drain plug, remove the oil filter, and install a new one. Refill with the recommended oil type and quantity.

What type of oil is recommended for the Yamaha YFM25BX Big Bear 250 2008?

Yamaha recommends using Yamalube 4, 10W-40 or an equivalent 4-stroke motor oil. Ensure the oil has a high detergent and anti-wear additives.

How do I troubleshoot starting problems on my Yamaha Big Bear 250?

First, check the battery for charge and connections. Inspect the spark plug for wear or fouling. Ensure the fuel system is delivering fuel properly. Check for any blown fuses and inspect the starter relay.

What is the recommended tire pressure for the Yamaha YFM25BX Big Bear 250?

The recommended tire pressure is typically 4 psi for the front tires and 5 psi for the rear tires. Always check the owner’s manual for specific details.

How often should I perform regular maintenance on my Yamaha Big Bear 250?

Regular maintenance should be performed every 6 months or 100 hours of operation, whichever comes first. This includes checking the brakes, fluid levels, tire condition, and general inspection of all systems.

How can I adjust the carburetor on the Yamaha YFM25BX Big Bear 250 2008?

To adjust the carburetor, locate the air/fuel mixture screw and idle screw. Adjust the mixture screw for optimal engine performance and tweak the idle screw to set the desired idle speed. Always refer to the service manual for precise adjustment instructions.

What should I do if my Yamaha Big Bear 250 is overheating?

Check the coolant level and ensure there are no leaks. Inspect the radiator for blockages and the fan for proper operation. Ensure that the oil level is correct and verify that the thermostat is functioning properly.

How do I replace the brake pads on my Yamaha Big Bear 250?

To replace the brake pads, remove the wheel and the brake caliper. Take out the old pads and install new ones, ensuring they are properly seated. Reinstall the caliper and wheel, then test the brakes for proper function.

What kind of spark plug does the Yamaha YFM25BX Big Bear 250 use?

The recommended spark plug for the Yamaha YFM25BX Big Bear 250 is NGK DR8EA or an equivalent. Always check the gap before installation.

How do I clean the air filter on my Yamaha Big Bear 250?

Remove the air filter cover and take out the air filter. Clean it using compressed air or wash it with a mild detergent and water. Let it dry completely before reinstalling. Replace if it is damaged or excessively dirty.