Two Brothers Racing Yamaha YFZ450 Dyna FS Ignition - Manual

Dyna FS Ignition
Yamaha YFZ450 ATV
11,500 RPM LIMIT (10,750 stock)
DFS7-12 for 2004+ YFZ450
Congratulations on your purchase of a Dynatek 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 bike will take longer.
The DynaFS ignition was designed to work best with the stock coil, coil wire, plug cap, and spark plug. The increase in
spark energy from using the DynaFS 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 coil-on-plug ignition coil.
This kit includes: DynaFS ignition, 14” tie wrap, and instruction sheet. This is a complete kit, and includes everything
needed to install the ignition.
Installation
1)
Turn ignition key off. Locate the stock ignition box, it is mounted near the front of the bike, between the
headlights. OPTIONAL: To make installation easier, remove the front headlights and the front plastic ‘hood’.
2) Unplug the stock ignition, taking care not to damage the harness connectors. There is a small tab on the harness
connectors that must be pushed in to unplug them. Remove the ignition from the bike, and remove the rubber
sleeve. Keep the stock ignition in a safe place - it may be required for troubleshooting.
3) Slide the Dyna ignition into the factory rubber sleeve and then slide the sleeve to the stock ignition mounting
location. Use the 14” tie wrap around the rubber sleeve and in-between the two connectors, to secure the Dyna
ignition in the rubber sleeve. Plug the ignition connectors into the Dyna ignition, making sure the connector seals
remain in place.
Calibration
The Dyna FS ignition is preprogrammed with a performance timing curve, see ignition advance chart.
NOTE: 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.
NOTE: This ignition will allow the engine to rev to a higher RPM than what it has before. Stock rev limit is 10,750rpm.
The revlimit is pre-programmed to 11,500. Because the rev limit is higher, the performance limits of other engine parts
(valvetrain for example) may be found. It may be necessary to replace these parts for best engine performance. Consult
with an engine builder for answers on what works best for your engine.
Troubleshooting
Troubleshooting the Dyna ignition is simple. If the bike will not start or run at all, reinstall the stock ignition. If this fixes
the problem, then the Dyna ignition should be returned to Dynatek for testing. If this does not fix the problem, then the
problem is somewhere else on the bike. Follow the troubleshooting procedures outlined in your bike shop manual.
If the bike runs, but poorly, put the stock ignition back on the bike. If this fixes the problem, reinstall the Dyna ignition. If
you are using non stock ignition coil, spark plug, or stator, replace them with OEM units. Then follow the procedures in the
calibration section to set the Dyna ignition up to work with your bike. If calibration doesn't fix the problem, the ignition
should be returned for testing. If the problem persists when using the stock ignition then the problem is external to the Dyna
ignition.