Honda 400EX Engine Specs
The Honda 400EX is a popular all-terrain vehicle (ATV) known for its powerful engine and exceptional performance. If you’re interested in learning more about the engine specifications, configuration, oil requirements, and service intervals of the Honda 400EX, you’ve come to the right place. In this article, we will delve into the details of this impressive machine.
Engine Configuration
The Honda 400EX is equipped with a 397cc, air-cooled, four-stroke engine. This single-cylinder powerhouse delivers a remarkable balance of power and reliability. The engine features a bore and stroke of 85mm x 70mm, providing a smooth and efficient combustion process. With its electric starter and a five-speed transmission, the Honda 400EX offers excellent control and versatility for riders of all skill levels.
Engine Oil Specs
To ensure optimal performance and longevity of your Honda 400EX engine, it is crucial to use the recommended engine oil. Honda recommends using a high-quality, four-stroke motor oil with an API classification of SF or higher. The oil should have a viscosity rating of SAE 10W-40 for general use, but it is important to consult your owner’s manual for specific oil recommendations based on your riding conditions.
Service Intervals
Regular maintenance is essential to keep your Honda 400EX running smoothly. Here are some general service intervals to follow:
- Oil Change: It is recommended to change the engine oil every 1000 miles or every six months, whichever comes first. Regular oil changes help remove contaminants and ensure proper lubrication.
- Oil Filter Replacement: Along with the oil change, it is advisable to replace the oil filter to maintain optimal filtration and prevent debris from circulating in the engine. This should be done every other oil change or every 2000 miles.
- Valve Clearance Adjustment: Checking and adjusting the valve clearance is crucial for proper engine performance. It is recommended to inspect the valve clearance every 6000 miles or every six months, and adjust if necessary.
- Spark Plug Replacement: The spark plug plays a vital role in the ignition process. It is recommended to replace the spark plug every 8000 miles or every year, depending on usage.
- Air Filter Cleaning/Replacement: The air filter prevents dirt and debris from entering the engine. It is important to clean or replace the air filter regularly, especially in dusty or muddy conditions.
Detailed Engine Specifications
For a comprehensive overview of the Honda 400EX engine specifications, refer to the following table:
| Engine Type | Air-cooled, four-stroke |
|---|---|
| Displacement | 397cc |
| Bore x Stroke | 85mm x 70mm |
| Compression Ratio | 9.3:1 |
| Starter | Electric |
| Transmission | Five-speed |
| Oil Capacity | 2.4 quarts (with filter change) |
| Fuel Capacity | 2.6 gallons |
In conclusion, the Honda 400EX is equipped with a powerful and reliable engine that delivers impressive performance on and off the trails. By following the recommended service intervals and using the appropriate engine oil, you can ensure that your Honda 400EX remains in top-notch condition for years to come. So, gear up, hop on your ATV, and enjoy the thrilling ride that the Honda 400EX has to offer!
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