The Daytona Twin Tec's Twin Tuner allows you to easily adjust your fuel injection to match the requirements of performance parts including camshafts, free flowing exhausts, and low restriction air filters. Installation takes only 10-15 minutes. You can use the mode and up/down pushbutton switches to add or subtract fuel in the RPM and throttle position ranges required by most applications. The Twin Tuner also has an advanced mode where you can use the optional USB Interface to make precise fuel adjustments. The USB Interface Software uses the same RPM rows and throttle position columns as the Dynojet Power Commander. You can make independent adjustments to the front and rear cylinders. The Twin Tuner works in combination with the Twin Scan II+ tuning aid. You don't need a dyno for precise tuning. All you have to do is install the Twin Scan II+ and ride the bike around some. You can then copy the air/fuel ratio corrections calculated by the Twin Scan II+ into the Twin Tuner using the software included with the USB Interface (P/N 259).