❏ From the beginning of time the
Honda 400EX has been one of the top
machines to have. With its great suspension geometry, powerful engine
and all-around good handling,
it makes for a perfect platform to
upgrade or leave stock. Honda first
introduced its 400 motor in the XR400
dirt bike, and in 1999 put that same
motor, with a few slight modifications
to beef it up internally, in the quad.
Now, 16 years later, we still have
the same reliable machine with an
updated look and a reverse gear.
The ATV world now has a variety
of really good machines to choose
from, ranging from smaller entry-level sport quads all the way up to the
Several advantages of Honda’s 400
motor are that it’s an air-cooled motor
that is easy to work on and has rocker
arms so you can adjust the valves
with ease in a few minutes. Honda is
still running a carburetor to help keep
the simplicity of the machine without
the added wiring harness, relays, fuel
injectors, fuel pump and such. To
help keep the transmission and other
internal parts cool and lubricated,
Honda installed an external oil tank
and additional oil cooler. Granted
a lot of the newer machines these
days are upgrading to fuel-injection
systems, we still approve the carbure-
tor machines for their pure simplicity
and, well, they work just great.
Honda makes each TRX400X with a
steel frame for strength and durability,
and on the front is double A-arms with
Showa shocks that have five preload
settings to control 8. 2 inches of wheel
travel. At the rear you will find a
The air-cooled engine performs well
and is very reliable. To help keep things
cool, Honda installed a separate oil tank
as well as an external oil cooler.
Doing wheelies is a fun skill to practice and improve on. Getting the front
end up in the air is an easy task with
the lower-end grunt.
For rear suspension you will find a swingarm attached to a solid axle with a single
Showa shock with compression and rebound adjustability for 9.1 inches of travel.
To help slow things down, you will find a single 220mm disc in the rear.
Baja-ready Pro-Link suspension with a
single Showa shock with full preload,
compression and rebound damping
settings for the straight axle to provide 9.1 inches of wheel travel. To
help stop you safely and quickly are
three hydraulic disc brakes, both front
wheels are controlled by a hand lever,
and the single rear from a foot lever.