Flash-Tune is a California-based company pioneering the reprogramming of stock ECUs via some pretty groundbreaking software. Yamahas are Flash-Tune's specialty, so I rode the FZ over to its headquarters in Orange, California, where owner Chris Gardell reflashed the FZ's ECU in an effort to smooth the bike's off/on and on/off throttle response. The process took less than an hour and was as simple as removing the ECU from under the tank and plugging it into a computer—there's no expensive hardware to buy and install. Flash-Tune has the ability to alter fuel and spark curves, engine braking, and the rev limit, along with a dozen other parameters. The software is a tuner's dream, and is available for download via Flash-Tune's website, ftecu.com. Reflashing the FZ-09's ECU costs $200 and is available as a mail-in service, typically with a one-day turnaround.