Yamaha YFM25BA Big Bear 250 2011 Owner's Manual

Yamaha YFM25BA Big Bear 250 2011 manual cover
Pages 146
Year 2011
Language(s)
English en

Yamaha YFM25BA Big Bear 250 2011 Specification

The Yamaha YFM25BA Big Bear 250 2011 is a robust and versatile utility ATV designed to deliver reliable performance for a variety of off-road tasks. At its core, the Big Bear 250 features a 249cc, air-cooled, SOHC 4-stroke engine that provides a balanced mix of power and efficiency. The engine is complemented by a Mikuni 29mm BSR carburetor, ensuring smooth throttle response and consistent fuel delivery.

The ATV is equipped with a five-speed transmission, including a reverse gear, allowing for precise control and maneuverability across diverse terrains. Its robust chassis is supported by an independent double wishbone front suspension with 5.7 inches of travel, and a swingarm rear suspension with 5.9 inches of travel, ensuring a comfortable and stable ride. Both front and rear suspensions are paired with preload-adjustable shocks, offering customization based on load and terrain.

The Yamaha YFM25BA Big Bear 250 boasts a high ground clearance of 6.3 inches, facilitating navigation over obstacles and rough ground. The braking system includes dual hydraulic front disc brakes and a sealed rear drum brake, providing reliable stopping power in various conditions. The ATV rides on durable 22-inch tires, enhancing traction and durability.

Ergonomically, the Big Bear 250 is designed for user comfort and ease of use. It features a wide, padded seat and handlebars positioned for reduced rider fatigue during extended periods of use. The ATV also includes a multifunction digital meter, offering essential information such as speed, fuel level, and maintenance reminders.

With a fuel capacity of 3.2 gallons and an efficient engine, the Yamaha YFM25BA Big Bear 250 2011 is built for extended operations. Its combination of performance, durability, and user-friendly features make it a dependable choice for both recreational riders and those needing a reliable utility ATV.

Yamaha YFM25BA Big Bear 250 2011 F.A.Q.

How often should I change the engine oil in my Yamaha YFM25BA Big Bear 250 2011?

It is recommended to change the engine oil every 20 hours of operation or at least once per season. Always use the oil type specified in the owner's manual.

What type of spark plug is suitable for the Yamaha Big Bear 250?

The recommended spark plug for the Yamaha Big Bear 250 is the NGK DR8EA. Ensure it is gapped correctly to 0.6-0.7 mm before installation.

How do I adjust the idle speed on my Big Bear 250?

To adjust the idle speed, locate the idle adjustment screw on the carburetor. Turn the screw clockwise to increase idle speed and counterclockwise to decrease it. The standard idle speed is 1,450 - 1,550 RPM.

What is the proper tire pressure for the Yamaha YFM25BA Big Bear 250?

The recommended tire pressure is 4.4 psi for the front tires and 4.0 psi for the rear tires. Check the pressure with a reliable gauge when the tires are cold.

How can I troubleshoot starting problems with my Big Bear 250?

If the engine won't start, check the battery charge, inspect the spark plug, and ensure there is sufficient fuel. Additionally, check the kill switch and make sure it is in the "Run" position.

What should I do if my Big Bear 250 overheats?

If overheating occurs, stop the engine immediately. Check the coolant level and inspect for any leaks in the cooling system. Ensure the radiator fins are clean and free from obstructions.

How do I clean the air filter on my Yamaha YFM25BA?

Remove the air filter from the air box, wash it with a mild detergent and water, then let it dry completely. Lightly oil the filter before reinstalling it. Check for any tears or damage.

How can I maintain the brakes on my Big Bear 250?

Regularly check the brake pads for wear and replace them if the material is less than 1 mm thick. Inspect the brake fluid level and top up if necessary, using DOT 4 brake fluid.

What are the steps to winterize my Yamaha YFM25BA Big Bear 250?

To winterize, change the engine oil, add fuel stabilizer, clean the machine thoroughly, disconnect the battery, and store the ATV in a dry, covered area. Cover it to protect from dust and debris.

How can I improve the fuel efficiency of my Big Bear 250?

Maintain proper tire pressure, ensure regular maintenance like oil changes and air filter cleaning, and avoid carrying unnecessary weight to improve fuel efficiency.