Motorbike Tuning / Repairs

The Techlusion Fuel Injection (TFi) control box is a new standard in fuel injection adjustment.

This system is different in its’ method of adjustment by dealing directly with the fuel injection signal after it leaves the factory ECU. It adjusts fueling without tricking sensors or modifying factory settings which limit the ECU’s effectiveness at compensating for changing altitude or weather conditions.

Idle/Cruise: As fuel injection is very efficient, it considers idle and cruise to be virtually identical as far as their A/F ratio requirement goes, so the low speed adjuster (Green Adjustment Screw) can be set similar to an idle mixture screw on a carburetor. As the motorcycle accelerates under light to medium load, the ECU maintains an A/F ratio consistent with its emissions focus, and the TFi box makes slight modifications to that focus based on your drivability requirements.

Midrange: With fuel injection midrange fueling is only relative to fast acceleration at or near full throttle. At certain speeds and loads as the factory ECU makes transitions between cruise and performance A/F ratios. Using the yellow adjustment screw and the RPM select adjustment the TFi box has the ability to select and alter fuel at these points of transition. This effect is similar to the effects that a needle position change and an accelerator pump can have in a carburetor.

Main/Top End: Once the throttle is opened abruptly or an engine RPM/load is achieved that demands a performance bias A/F ratio, the main fuel adjuster can come into play. (Red Adjustment Screw) Similar to carburetion, air filters, race exhaust, cams, etc. can effect the fuel requirements in the performance range. The main fuel adjuster can compensate for these types of modifications just like changing a main jet in a carburetor.