able to bore the cylinder for us. A
Stage 2 cam from Hot Cams finished
off the engine’s internal upgrades.
A FMF header costing $251 and a
muffler for $296 were added. As for
jetting, we went with a DynoJet kit for
$48. A 170 main jet was installed, the
needle clip moved to the third spot
down from the top, a 45 pilot jet and
then the fuel screw was turned out
by three turns. Now the TRX400 felt
like a revitalized machine, and power
was broadened through every range.
Honda tends to make their motor’s
output a decent amount of torque,
and the upgrades enhanced that fact.
PROTECTION AND HANDLING
Nerf bars are a must for safety, and
Tusk has simple, inexpensive bolt-on
nerf bars for the Honda. Tusk also
helped us with a front bumper for $65,
a rear grab bar for $40, and finally
a front brake-cap cover and throttle
cover. After installing some protective bolt-on parts, we then wanted
to give the handling a better feel. It’s
no surprise that simply changing the
handlebars will help, so we went
with a Renthal bar with a 7/8 bend,
Renthal grips and even put a R-1
Works chain on it. After those were
installed, we decided to incorporate a
Tusk makes nerf bars for most sport ATVs, so we picked up this bolt-on pair and
they fit perfectly. This pair ran us $99, which is a great deal for the protection.
The custom graphics by Psych Graphix helped make the TRX400 look far more stylish, as well as the new red seat cover.
We went with an FMF exhaust system from the header to the muffler,
and power was increased throughout
the whole range. We noticed that this
pipe gave the Honda more bottom-end
A big-bore piston, Stage 2 Hot Cam,
Dynojet jetting, and a two-stage air filter
from Uni Filter for $24 all played a part
in getting this tired motor new life. The
custom graphics also helped make the
TRX400 look stylish.