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.


I’ve got a honda 400ex with a bore kit that bored it out to 440cc and a pipe and little ins and outs and i got a top speed of 130mph!! so dont tell me their not fast i almost pooped my pants

thats great.. i love when people say it does like 100mph.. wtf.. are you crazy... or just on glue.. dont use a car to get your topspeed.. use a radar or a speed trap.. i have a 400ex with mods revbox.. and i doubt that it does close to 90 maybe 70 if im lucky.. but yes.. the 400ex is the best quad all around.. you can do whatever you want with it.. race. have fun. work. you can even tow stuff with a trailer kit.. so if you dont want anything fancy.. go with the 400ex..

i have a 2006 400 ex with power core 4 exaust the top speed your gonna get out of a 400 is about 70 mph if you hook a 450 to it and drag it you might go 80


All you guys are retarted, The 400EX is a dinosaur. Its been virtually unchanged since it came out in 1999. For all of you that think your 400 does 75+ then your being unrealistic, Im not not even gonna start with the kid who thinks his does 90. I’ll put it this way. The new-age 4- strokes (YFZ450, TRX450R, R450) are all much more high performance than the 400, their not even close. They are lighter, faster, handle better. The list goes on and on... These machines will do 75. Maybe 80 MaX. (Were talking stock) And dont tell me otherwise. I have a YFZ and A 450R. My first quad was also a 400EX when i was younger. Dont get me wrong the 400 is a good quad, and its reliability is unmatched, but it will not do what you guys are advertising.

dude that kid that said that his bones stock 400ex does 90mph man what are u smokin what ever it is i want some i drag race a 400ex that is all worked up and i dont evn get 85mph all that working them up does is let u get to the top speed faster intill u start playing with spockets

both of them stock a honda 450 will beat it but the yamahas 450 has more power then hondas

a 450r will be the yamaha 450

My 2007 400 ex topped out at 76 mph on the road with a car driving beside me. Only upgrade to it is a K&N air filter.

A stock 400ex doesn’t go 70-75mph it goes around 65mph and even if you add a pipe and airfilter that doesn’t increase you top speed it just lets you get there faster to increase you top speed I would start with getting a Rev Box.


my friend was in front of me in his car and he just started pulling away at 95 and my 400ex is stock, so it does well over 90mph

hello i live in the netherlands do you also shipping atv’s to the netherlands and what is the total price to shipping and buy the atv honda trx400ex to the netherlands

The stock 400ex goes anywhere from 70-75 mph

The dude Miguel that beat the 450R by 5 miles was they pushin the 450R or did it even have tires on it?

My YFZ450 smoked a 2006 400ex that was jetted with a yoshimura exhaust and a 440 big bore kit in it and my 450 was stock by almost a mile and i was like WOW!!

What is the top speed of the 2006 TRX400 ?

my 400 Beat a trx450r and it had a pipe jetted and it had rev box in it and i beat it by 5 miles it almost will beat a predator that is jetted and piped.

yeah my TRX 400EX goes like 36mph i pust some new muffler bearing in it. yeah i beat a 2005 Yamaha Banshee that had Big Bore carb kit, white brothers series exhaust, and a kick stand. i was like whooa! yeah I beat him by 4.8 sec. it was nuts!


im getting a 400 ex but all of my other poeple i hang out with have trx 450.

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