07-13 KAWASAKI VN900C: Cobra FI2000R / CARB Digital Fuel Processor Continuously Variable Tuning (CVT) is the key to the remarkable performance the Fi2000 PowrPro delivers. PowrPro uses electronic control technology that calculates the bike&#39;s rate of acceleration by reading crankshaft rotation at the flywheel and changes in load just as a dynamometer measures acceleration at the rear wheel. It measures and adjusts fuel flow during acceleration to the injectors in microseconds for super-fast fuel tuning - continuously and automatically; net result: precise EFI tuning now happens in the real world in real time, non-stop, up to 80 times per sec D-633-1). The Fi2000R ARB units are model-specific and arrive preset for each bike.