Kuryakyn 9218 Wild Things Fuel Injection Controller An easy and affordable way to adjust your fuel injection system to accommodate modifications to your motorcycles exhaust system, air cleaner, or engine components. Aside from reading throttle position and RPM, it also takes into account the load the engine is under Allows you to tune the fuel injection much the same way you jet a carburetor. The green pot functions like the fuel mixture screw and pilot jet on a carburetor to adjust light throttle operation through highway cruising and steady throttle The yellow pot functions like an accelerator pump on a carburetor.