Two Brothers Racing Honda TRX450R Dyna FS Ignition - Manual

Dyna FS Ignition
2004-06 Honda TRX450R
DFS1-13P, DFS1-15P
Congratulations on your purchase of a Dyna ignition. Please take a moment to read these instructions completely
before installing the ignition. The installation will only take a few minutes, but proper setup for your specific quad
will take longer.
The Dyna FS ignition was designed to work best with stock coils, coil wires, plug caps, and spark plugs. The
increase in spark energy from using the Dyna FS ignition is enough so that adding any of these will not improve
performance, and can cause problems. Use resistor type spark plugs ONLY. Use the stock resistor style spark plug
cap.
This kit includes: Dyna FS ignition, Curve Selector Switch, and instruction sheet. This is a complete kit, and
includes everything needed to install the ignition.
Installation
1)
Locate the stock ignition box, it is under the top cover plastic bodywork, between the headlight and
handlebars. With the top cover removed the ignition is visible just behind the headlight. For both
connectors on the ignition, press the locking tab in, and remove the connector Remove the ignition and
rubber sleeve from the mounting bracket by sliding it back towards the handle bars.
2) Pull the stock ignition out of the rubber sleeve. Keep the stock ignition in a safe place - it may be required
for troubleshooting.
3) Feed the wires from the Dyna ignition through the rubber sleeve, and bring them out of the hole in the end
of the sleeve. Once these are through, slide the Dyna ignition into the sleeve.
4) Slide the Dyna ignition over the mounting bracket. The 2006 models will require that the bracket be
tweaked to fit the smaller Dyna ignition. Use the supplied zip ties to secure the ignition in the rubber sleeve.
5) Plug the 8 and 6 pin ignition connectors into the Dyna ignition. Plug the curve switch into the connector
on the Dyna ignition. On the 2006 models, there is a 4 pin adapter that needs to be plugged into the 4 pin
connector from the stock wiring harness, and then connected to the 4 pin programming connector on the
Dyna ignition. The wiring on this harness is bidrectional, so you can plug it in either way, and it will work.
6) Mount curve switch in desired location and reinstall the top cover. The wire length is long enough so that
you can feed it up to the handlebars. You may want to mount it so that it is easily accessible for initial
tuning. Do not cut or lengthen the wires!
Calibration
The TRX450R Dyna FS ignition is preprogrammed with 4 timing curves. The curves are selected by the curve
selector switch. Removing the switch will cause the ignition to default to the curve in position 4(labeled stock on the
curve switch) which is the stock 2004-05 timing curve.
Curve 4 is identical to the curve that came with the stock 2004-05ignition module, which will provide more advance
than the stock 2006 timing curve. It will have slightly increased spark energy over stock at lower RPMs, and slightly
less advance at kick speeds for easier starting. Other than that, it should behave exactly the same as stock. This
curve also has the rev limit set at 9800RPM, the same as the stock ignition box.
Curves 1-3 all have the rev limit set higher. See the attached diagram for the exact details of each curve.
Use of this ignition may require rejetting of the carburetor to supply more fuel to maximize performance gains. If
you are unsure of this tuning process, the services of a competent mechanic should be employed. Using the ignition
without properly jetting the carburetor may result in a lean misfire condition when operating at RPMs above the
stock RPM limit. Do not operate the engine in a lean condition for extended periods or damage may result.