Yamaha YFM350AS Bruin 350 2004 Owner's Manual

Yamaha YFM350AS Bruin 350 2004 manual cover

Pages 172

Year 2004

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of 172

Yamaha YFM350AS Bruin 350 2004 Specification

The Yamaha YFM350AS Bruin 350, released in 2004, is a versatile all-terrain vehicle (ATV) engineered for both recreational use and utility tasks. It features a robust 348cc, air-cooled, four-stroke, single-cylinder engine that delivers reliable power and torque across a wide range of conditions. The engine is paired with Yamaha's Ultramatic V-belt transmission, which offers smooth automatic shifting and an efficient engine braking system, enhancing control during descents.

The Bruin 350 is equipped with an On-Command 2WD/4WD system, allowing riders to easily switch between two-wheel drive and four-wheel drive, depending on the terrain. The ATV’s chassis is designed for durability and comfort, featuring an independent double-wishbone front suspension with 5.8 inches of travel and a swingarm rear suspension with 6.3 inches of travel. These suspension systems ensure a smooth ride over rough terrain.

The braking system includes dual hydraulic front disc brakes and a sealed rear drum brake, providing reliable stopping power in various conditions. The YFM350AS Bruin 350 has a ground clearance of 9.7 inches and a total fuel capacity of 3.2 gallons, allowing for extended periods of operation without refueling. The ATV's ergonomics are tailored for rider comfort, with a well-padded seat and intuitive control layout.

Additional features include a front cargo rack with a capacity of 88 pounds and a rear cargo rack that can hold up to 176 pounds, making it practical for transporting gear and supplies. The Bruin 350’s overall design prioritizes durability and ease of maintenance, ensuring that it remains a dependable choice for both work and recreational activities.

Yamaha YFM350AS Bruin 350 2004 F.A.Q.

How do I change the oil on a Yamaha YFM350AS Bruin 350 2004?

To change the oil on your Yamaha YFM350AS Bruin 350, first warm up the engine to ensure the oil flows out smoothly. Turn off the engine and place an oil pan under the engine. Remove the oil drain plug and allow the oil to fully drain. Replace the drain plug and remove the oil filter. Install a new oil filter and fill the engine with the recommended type and amount of oil.

What should I do if my Yamaha Bruin 350 won't start?

If your Yamaha Bruin 350 won't start, check the battery to ensure it's charged and the terminals are clean and tight. Verify that the fuel valve is turned on and that there is enough fuel in the tank. Inspect the spark plug for fouling or wear and replace if necessary. Also, check the kill switch and ensure it is in the 'run' position.

How often should I replace the air filter on my Yamaha YFM350AS?

It's recommended to inspect the air filter every 50 hours of operation or more frequently in dusty conditions. Replace the air filter if it appears dirty or damaged to ensure optimal engine performance.

What type of spark plug should I use for the Yamaha Bruin 350?

The recommended spark plug for the Yamaha YFM350AS Bruin 350 is NGK DR8EA. Ensure that it is properly gapped according to the specifications in the owner's manual before installation.

How can I improve the braking performance of my Yamaha Bruin 350?

To improve braking performance, regularly inspect and replace worn brake pads and shoes. Ensure the brake fluid is at the correct level and replace it if it's old or contaminated. Adjust the brake cables and levers for proper tension and response.

What is the recommended tire pressure for the Yamaha YFM350AS Bruin 350?

The recommended tire pressure for the Yamaha YFM350AS Bruin 350 is typically 4 psi for the front tires and 5 psi for the rear tires. Always consult the owner's manual for specific recommendations and adjust based on load and terrain.

How do I adjust the idle speed on my Yamaha Bruin 350?

To adjust the idle speed, locate the idle speed adjustment screw on the carburetor. With the engine running and warmed up, turn the screw clockwise to increase idle speed or counterclockwise to decrease it. Adjust until the engine idles smoothly at the specified RPM in the owner's manual.

What should I do if my Yamaha Bruin 350 is overheating?

If your Yamaha Bruin 350 is overheating, check the coolant level and top it off if necessary. Inspect the radiator for blockages and clean it to improve airflow. Ensure the fan is functioning properly, and check for leaks in the cooling system.

How do I troubleshoot electrical issues on my Yamaha YFM350AS?

To troubleshoot electrical issues, start by checking the main fuse and replacing it if blown. Inspect the battery connections for corrosion and ensure they are tight. Use a multimeter to check the battery voltage and the continuity of wires and switches involved in the problematic circuit.

What regular maintenance does the Yamaha Bruin 350 require?

Regular maintenance for the Yamaha Bruin 350 includes oil and filter changes, air filter inspection and replacement, checking and adjusting brakes, lubricating the chassis and control cables, inspecting tires and adjusting pressure, and checking all fluid levels. Refer to the owner's manual for specific intervals and details.