The Yamaha YFZ 450 and YFZ450R are high-performance sport ATVs built for racing and off-road riding. Their 449cc liquid-cooled engine is designed for high RPM operation, making proper oil selection and maintenance critical for engine life and performance.
Because this engine runs under extreme load and heat, using the correct viscosity and changing oil regularly is essential to prevent wear, overheating, and internal damage.
YFZ 450 Oil Type
The Yamaha YFZ 450 uses 4-stroke motorcycle/ATV engine oil with a recommended viscosity of SAE 10W-40 for most riding conditions. In extreme temperatures, other multi-grade oils like 5W-30 or 15W-40 can also be used depending on climate.
It is important to use JASO MA or MA2 certified oil because the engine uses a wet clutch system that shares oil with the transmission.
Important: Never use car “energy conserving” oil. It can cause wet clutch slipping and reduce performance in racing or off-road conditions.
YFZ 450 Oil Capacity
The oil capacity of the Yamaha YFZ 450 is approximately 1.75 to 1.85 liters (about 1.9 quarts) depending on whether the oil filter is replaced.
Best Oil for YFZ 450
Recommended Oils
- Yamalube 10W-40 4T
- Motul 7100 10W-40
- Castrol Power1 10W-40
- Mobil 1 Racing 4T
- Amsoil ATV/UTV 10W-40
Benefits
- Handles high RPM stress
- Protects clutch and gearbox
- Reduces engine wear
- Improves heat resistance
- Better throttle response
Oil Change Interval
Common Oil Problems
Overheating
High RPM riding can break down oil faster if not changed regularly.
Clutch Slippage
Using incorrect oil can reduce wet clutch performance.
Oil Contamination
Dust and off-road debris can shorten oil life in harsh conditions.
Final Thoughts
The Yamaha YFZ 450 is a high-performance ATV that depends heavily on proper lubrication. Using 10W-40 JASO MA/MA2 oil and following strict oil change intervals ensures maximum performance, engine protection, and long-term durability in racing and off-road environments.