Yamaha YZ450FT 2005 Owner's Manual

Pages 308

Year 2005

Language(s)

of 308

Yamaha YZ450FT 2005 Specification

The 2005 Yamaha YZ450FT is heralded for its robust performance and engineering excellence in the motocross segment. This model is equipped with a liquid-cooled, 449cc, single-cylinder, four-stroke engine, which provides a remarkable balance of power and torque. The engine features a five-valve cylinder head, delivering efficient airflow and enhancing combustion efficiency. Fuel delivery is managed by a 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS), ensuring precise fuel atomization and throttle response.

The transmission is a five-speed constant mesh, allowing for smooth and reliable gear shifts, which is critical for competitive racing and varied terrain. The chassis is constructed from lightweight aluminum, contributing to the bike's overall agility and handling prowess. Suspension duties are handled by a fully adjustable 48mm Kayaba inverted front fork with 11.8 inches of travel and a fully adjustable Kayaba rear shock with 12.4 inches of travel, ensuring optimal shock absorption and stability.

Braking performance is solidified by a 250mm front disc and a 245mm rear disc, providing ample stopping power under diverse conditions. The bike rides on 21-inch front and 19-inch rear wheels, fitted with high-traction tires designed for rigorous off-road use. Ergonomics are tailored for rider comfort and control, featuring a narrow frame and a flat seat that facilitates easy movement and maneuverability.

Weighing approximately 220 pounds (dry weight), the YZ450FT maintains a favorable power-to-weight ratio, enhancing its competitive edge. The fuel tank capacity is 2.1 gallons, adequate for extended off-road sessions. Overall, the 2005 Yamaha YZ450FT stands out as a formidable motocross machine, marrying power, precision, and durability to meet the demands of serious riders and racers.

Yamaha YZ450FT 2005 F.A.Q.

What is the correct oil type and capacity for the Yamaha YZ450F 2005?

The Yamaha YZ450F 2005 requires 10W-40 or 15W-50 four-stroke motorcycle oil. The oil capacity is approximately 1.06 US quarts (1.0 liter) without an oil filter change and 1.16 US quarts (1.1 liters) with a filter change.

How often should I clean the air filter on my Yamaha YZ450F 2005?

The air filter should be cleaned after every 2-3 rides, especially if riding in dusty or sandy conditions. Regular maintenance will ensure optimal performance and longevity of the engine.

What are the common causes of starting problems with the Yamaha YZ450F 2005?

Starting problems can be caused by a weak spark plug, clogged fuel system, low compression, or a faulty ignition coil. Regular maintenance and inspection can help prevent these issues.

How do I properly adjust the chain tension on my Yamaha YZ450F 2005?

To adjust the chain tension, ensure the bike is on a stand, loosen the rear axle nut, and adjust the chain adjusters evenly on both sides. Aim for 1.2 to 1.6 inches (30-40 mm) of slack at the midpoint of the chain. Tighten the axle nut once adjustments are complete.

What is the recommended interval for valve clearance checks on the Yamaha YZ450F 2005?

Valve clearance should be checked every 15 hours of engine operation. Regular inspections ensure the valves are seating properly, preventing engine performance issues.

How can I troubleshoot overheating issues with my Yamaha YZ450F 2005?

Overheating can be caused by low coolant levels, a clogged radiator, or a faulty thermostat. Check the coolant level, clean the radiator fins, and ensure the thermostat is functioning correctly.

What is the proper tire pressure for the Yamaha YZ450F 2005?

The recommended tire pressure for the Yamaha YZ450F 2005 is typically 12-15 psi for both the front and rear tires, depending on terrain and rider preference. Adjust accordingly for optimal traction and performance.

How do I replace the spark plug on my Yamaha YZ450F 2005?

To replace the spark plug, remove the seat and fuel tank for access. Disconnect the spark plug cap, use a spark plug socket to remove the old plug, and install a new plug with the correct gap (0.8–0.9 mm). Reassemble the components.

What are the symptoms of a failing clutch on the Yamaha YZ450F 2005?

Symptoms of a failing clutch include slipping under acceleration, a spongy clutch lever feel, and difficulty shifting gears. Inspect the clutch plates and springs for wear and replace if necessary.

How can I improve the suspension setup on my Yamaha YZ450F 2005 for different terrains?

To improve suspension for different terrains, adjust the fork and shock settings according to the terrain type. Softer settings are better for rough, bumpy areas, while firmer settings are suited for smoother, faster tracks. Consult the owner's manual for detailed adjustment procedures.