2003 Honda® HONDA 400 EX

The 2003 Honda TRX400EX continues the legacy of one of the most iconic and dependable sport ATVs ever produced. By the time this model year was released, Honda had already proven that the TRX400EX could meet the demands of both recreational riders and seasoned off-road enthusiasts. With minor refinements over its initial versions, the 2003 model carried forward the strengths that made it a favorite: durability, ease of maintenance, and all-around performance.

At the core of the TRX400EX is its 397cc air-cooled, four-stroke engine. While it doesn't break land speed records, its power delivery is smooth, predictable, and extremely rider-friendly. It's an engine that thrives in trail conditions, loose dirt, and mid-range acceleration—where consistency and control are far more valuable than sheer horsepower. Its kick for casual play riding, combined with the 5-speed manual transmission and reverse gear, makes the 400EX incredibly versatile for a range of uses—from tight woods to open trail runs and even moderate dunes.

Unlike some sport quads that demand constant tuning or careful riding, the 400EX offers a “set it and forget it” experience. The air-cooled motor and bulletproof valve train require less upkeep than liquid-cooled counterparts, making it a top choice for riders who want more seat time and less garage time. Maintenance tasks like oil changes, valve adjustments, and chain lubrication are all relatively straightforward—even for beginners.

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