• The first new feature is "Rev X-tend". This will give you the ability to have an increased rev limit over stock without having to modify the bike's ECM. No longer will you need to take the bike to the dealer to have the ECM "re flashed" in order to have the higher rev limit your bike needs with modified cams, heads, etc.
• The second new feature is "Start Fuel". This allows you to add additional fuel during startup. On heavily modified and/or large displacement engines (i.e. 124 Cubic Inch) extra fuel is sometimes required to ease starting. This is a software adjustable setting that makes it possible to increase the amount of fuel injected into the engine during cranking without making the idle overly rich once the engine starts.

There are many variables to each application. The Power Commander allows for tuning to the perfect air/fuel ratio will ensure that the engine can produce the maximum possible horsepower for that given combination.

Consider that a typical street rider spends a great deal of time riding in part throttle conditions. Shown below are two graphs of a motorcycle before and after installation of the Power Commander. The top graph line shows the horsepower curve accelerating and the lower graph shows the corresponding air/fuel ratio. You can see a large horsepower increase between the two. The red curve shows a typical stock motorcycle with minor performance modifications (slip-on exhaust).

The blue curve shows that same combination with the Power Commander installed and you can see that the line is nearly straight. Consequently, the rider will feel a large improvement while riding the motorcycle. It is very possible that the peak wide open throttle horsepower is unchanged. The correct air/fuel ratio number (say 12.9:1 or 13.2:1) depends upon many factors like combustion chamber design, but what we want is that figure at every point in the curve (straight line).

Base Map - The Power Commander is supplied with a given (base) map stored in the microprocessor. This (base map) is typically a map that has been developed to provide an improvement for most combinations matching the map description (i.e. stock bike or performance exhaust and air filter).

In general we have found that a typical stock bike has areas in the fuel curve that are far from optimal for drive-ability and performance. We could say that they are typically 70% optimized in stock condition and 60% - 65% with minor performance modifications. After installation of the Power Commander with the base map, we would expect to see 85% - 95% optimization. Power Commander Alternate Maps - Each Power Commander is supplied with a number of alternate maps on a CD-ROM and all the maps are available for download on our web site.

You may notice that we have a map specifically for "Brand A" slip-on exhaust and another for "Brand B" slip-on exhaust. Although the difference between the two maps is likely to be very small, these difference will increase the optimization for that given combination. If you have a "Brand C" exhaust and we do not have a specific map, you should find that "Brand A" or Brand B" maps will provide a good improvement on your bike. If you have a Windows 98SE/ME/2000/XP computer, you can upload alternate maps or make changes to the existing map using the Control Center software and USB cable supplied with your PC. (Detailed Software tutorials and quick reference software screen shots are available on the CD-ROM or web site).

If you do not have a computer, you can change the fuel curve with the faceplate buttons. This is a simple adjustment that can move the fuel curve richer or leaner in each area of the map. (Please refer to the paper installation guide or adjustment video on the CD-ROM).