Honda | Media Newsroom

With aggressive styling and the convenience of a Reverse gear, the sport-model TRX400EX combines high performance and refinement like nothing else in its class.

Unique Features

• The 397cc RFVC engine draws its breath from the same engine that powered the bulletproof XR™400R.
• Rugged steel frame with removable subframe for easy maintenance.
• Beautiful one-piece cast-aluminum swingarm offers exceptional rigidity.
• Radial tires for exceptional handling.
• Triple disc brakes provide superb stopping power.
• Aggressive body style complements the all-sport appearance.

Engine/Drivetrain

• High-performance 397cc dry-sump air-cooled four-stroke single-cylinder engine.
• Radial Four-Valve Combustion Chamber (RFVC) for maximum combustion efficiency and horsepower.
• Camshaft timing developed especially to meet ATV requirements for torque and useable horsepower.
• Gear-driven counterbalancer minimizes engine vibration for smooth operation.
• Dual intake and exhaust ports for maximum engine efficiency in sport operating conditions.
• Maintenance-free automatic cam-chain tensioner.
• Closed crankcase vent system safeguards against engine oil contamination.
• 38mm carburetor provides light throttle effort, superb air/fuel mixing and driveability. An accelerator pump ensures excellent throttle response for maximum power.
• Stainless steel dual exhaust head pipes resist corrosion.
• USDA-qualified muffler/spark arrester offers quiet operation and maximum power.
• CD ignition with electronic advance and 9100-rpm engine rev limiter.
• Heavy-duty clutch has 2mm-thick plates designed to stand up to sport-ATV demands.
• High-efficiency oil cooler supplements the large-capacity oil tank for maximum engine cooling.
• Five-speed transmission with Reverse has gears and ratios specifically designed for sport-ATV use.

Chassis/Suspension

• Round-tube steel frame with removable subframe is lightweight, durable and very strong.
• One-piece cast-aluminum swingarm for maximum strength, rigidity and durability.
• Independent double-wishbone front suspension offers 8.2 inches of travel from twin Showa shock absorbers with five-position adjustable spring preload for superb ride quality over harsh terrain.
• Pro-Link® rear suspension with a fully adjustable large-diameter aluminum-body piggyback Showa shock absorber provides 9.1 inches of travel.
• Triple disc brakes for excellent stopping power and a weight-saving aluminum rear caliper stay.
• All Pro-Link components are made of aluminum to further reduce vehicle weight.
• Lightweight aluminum wheels reduce unsprung weight for even better handling.
• Radial tires with knobby pattern provide superb traction and cornering ability.
• Durable and lightweight heavy-duty O-ring- sealed drive chain.
• Easy-to-use eccentric chain adjuster.

Additional Features

• TRX™450R-inspired bodywork.
• Engine design meets California Air Resources Board (CARB) off-road emissions standards.
• Convenient push-button electric starting.
• Long, narrow seat provides excellent comfort and superb sport riding ergonomics.
• Aggressive styling of front cowl, fuel tank and fenders complements pure-sport design.
• Durable plastic fuel tank.
• Dual 30w headlights integrated into front cowl provide distinctive sport style and excellent function.
• Rear brakelight.
• Snorkel-type airbox to avoid contamination from water and dirt.
• Washable, two-stage, large-capacity foam air filter.
• Oil tank features a dipstick for easy maintenance.
• Comfortable dogleg levers; clutch lever has cable adjuster and dust cover.
• Tough steel front skid-plate.
• Heavy-duty steel skid-plate protects rear brake disc and sprocket.
• Engine cases protected by a tough urethane skid-plate.
• Rear mudguard with rigid footrests.
• Maintenance-free battery.
• Keyed ignition switch offers added security.
• Multi-function handlebar switch assembly is simple to operate.
• Easy-to-use parking brake.
• Tool kit includes tire-pressure air gauge and owner's manual.
• Assembled in Timmonsville, South Carolina.
• Transferable six-month limited warranty; extended coverage available with a Honda Protection Plan.
• Purchase of a new, previously unregistered Honda unit by an individual retail user in the United States qualifies the owner for a one-year complimentary membership in the Honda Rider's Club of America™ (HRCA®). Benefits include online access to the Honda Common Service Manual, six issues of the bimonthly Honda Red Rider™ magazine, travel discounts, trip routing, MSF reimbursement, plus access to the HRCA Web site (www.hrca.honda.com). Look for the HRCA support team at select off-road events across the country. For details on the HRCA, dealers should call (310) 783-3958, 8:30 a.m. to 5 p.m. Pacific Time.

Available accessories

• Flag Kit.