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INSTRUCTION SUPPLEMENT
99-LATER HONDA
TRX400EX
Removing Stock Carb and Cables
1.Remove seat/fender assembly and fuel
tank.
2.Remove throttle cables paying close
attention to routing.
3.Remove thumb throttle housing if you are
installing a twist throttle.
4.Remove air box and air box intake tube.
5.Remove stock carburetor.
6.Stuff a clean rag into intake manifold to
keep debris from entering engine.
Preparing machine for carburetor
installation
1. Route the provided throttle cables per
manufacturer’s recommended procedure,
routing them the same as the stock cables.
2.Remove the rubber alignment tabs from
the manifold using a razor blade or cutters.
Be very careful not to damage the intake
manifold!
3.Remove air box intake tube from the air
box and use a hacksaw to cut approx. 1½”
off of the air box intake tube. Your tube
should resemble the one shown in Figure 1.
Re-assemble the air intake tube into air box
and install back onto bike. Don’t forget to
tighten clamp around intake tube and re-
insert crank vent into the air boot.
Figure 1.
Thumb Throttle
Attach cable into cable wheel with the cable
end at the 8:00 position of the cable wheel,
then into bracket. Secure by replacing the
cable bracket end and phillips screw. See
Figure 2.
Figure 2.
Twist Throttle
1.Install the pull (see figure 4 for cable
identification), cable end into the 8:00
position and the idle cable end into the
11:00 position on the cable wheel. See
Figure 3.
Figure 3.
Figure 4.
Pull Cable