Oil and Maintenance Guide for 2004 Honda TRX400EX 397
Before You Service the Engine
To keep your 2004 Honda TRX400EX 397 running smoothly, you'll need to use the right lubricant and carefully check the level after refilling. Before you pull the drain plug, make sure you know the proper refill and level-check procedure. Keep in mind that a published capacity might not be the exact amount you need after a routine drain.
How much oil does a 2004 Honda TRX400EX 397 take?
The listed engine oil capacity is 1.8 quarts. Since the amount required after a routine drain can vary from this figure, always follow the correct level-check procedure when you refill it.
Does using synthetic oil change the viscosity grade an ATV needs?
No. Synthetic refers to how the oil is formulated, which is different from its SAE viscosity grade. Even if you use a synthetic oil, it still must meet the proper grade and engine application specifications.
