Honda’s TRX400EX, also known in some markets as the Sportrax 400, arrived for the 1999 model year as a high-performance sport ATV and quickly became one of the company’s most influential off-road machines. Honda’s own historical material places the model in 1999 as a milestone return to the sport-ATV segment, and contemporary recall documentation shows the TRX400EX being sold beginning in July 1999. The model was built through the 2008 model year, after which Honda renamed the successor TRX400X for 2009 rather than continuing the EX nameplate. In practical enthusiast terms, that means the TRX400EX represents the original 1999–2008 chapter of Honda’s 400-class sport quad lineage. The machine earned a strong reputation for blending approachable handling with a durable four-stroke layout, and it helped re-establish Honda’s presence in the performance ATV market after a long absence from that niche. Over its run, the nameplate became a familiar benchmark for trail riders and sport-ATV enthusiasts alike, especially for buyers who wanted a simpler, more user-friendly alternative to the more race-focused quads of the era.
MODEL HISTORY