2006 Honda TRX 400 EX

Want the best all-around sport ATV that provides abundant performance for dune-blasting or trail-taming? With electric start, new-for-’06 reverse, and dependable, 4-stroke air-cooled performance; it may be all the ATV you’ll ever need. Just be ready to humble your friends and show them the trail from your Honda taillight.

New for 2006

New Black color joins Red.

Unique Features

The 397cc RFVC engine draws its breath from the same engine that powered the bulletproof XR(TM)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.


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.


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(R) 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(TM)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 ATV 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 water and dirt contamination.
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 low-pressure air gauge and owner’s manual.


to tht "fast 400" guy on page 2 ur stupid face it i dont care wat kind of fuel u have in a stock 400 anything it wont go 145 mph,and u sure its not a stock gsxr 600 motor gahh lee!!!

to yamaha fans,
all you have is a yfz450, the raptor . any 450 and keep can keep up/beat a raptor. btw a raptor has like 700cc witch is 250cc more the a 400ex and a 400 can keep up. honda is the best and always will be!!!

any one who thinks a 400ex is going to do more than 90 with out a coustizm 500 kit in it in the dumbest person ever and should be shot in the

the 400 might not but check out the 450 ex it will keep up with the new raptor

the raptor 700r would walk over the new honda 700xx all day no matter what the raptor is an all around better atv

hey im 14 and i just got an 04 honda 400ex with itp tires and rims and a blindstar bumper and grab bar and fly handlebars. do any of you boys have some tips for me to soup her up a lil bit?

good luck smoking my dad on his yamaha raptor 700 with a k&n you wounldnt even smoke a stock yamaha raptor 700

dudes i got a 440ex with a torbo on it.
ill smoke any of u panziys with yamahas

raptor 700 all the way

raptor 700 obviously

raptor 350 or 700??

hey ya dude the raptor does kill the 400ex that guy must be on somthing on buffalo creek me and my dad have got into the wide open and raced we both have studs and the creek was wide open and he killed me with his raptor it was wicked

the raptor is fast tho! what do u ride?

A) I never said a raptor couldn’t beat me.
smiley I was talking about straight up top speed drag racing. I dont even ride a track. the one time i did my uncle beat me on his warrior.
c) get your information right before speaking

the guy with the z400 your dumb a raptor would kill u the 400ex 06 would kill u on a track get some who knows how to ride it

ya ic wear ur goin my dad has a raptor 700 that has alot of after market parts just like axle tires bumper and stuff like that nothin with the engine and he was topped out at 93mph thats not a lie his friend has a speed gun and he was topped out at that on a flat grass area

You guys are funny...i have an 06 z400 and with a k&n filter and yoshi pipe i top out at around 72 to 75 miles an hour. I have not found a 400 ex who can beat me yet. so goin 130 and 180? its not ganna happin. you guys are idiots. the 700 raptor wont even do that stock and you guys wont touch one of those in your life time. The honda 450 and yfz 450 wont even do that stock and you think you can do that on a 400 stock. the 450s cant even do that with modified. so quit lien. its not ganna happin in a million years.

400ex goes 100mph

what goes faster the honda 400 ex or the suzuki 400 sport quad? thanks, jason

my friend clocked his 2004 honda 400ex of at 82mph and his quad has an fmf pipe and silencer so that made a bit of a difference

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