I wanted to test if my speedometer was actually accurate especially at higher speed. I downloaded an app called speedometer and tested app in my car to compare and it was 100% accurate to my car and another car. I tested it tonight on my FZ8 and confirmed that it was 5 to 6 mph higher compared to GPS speedometer app. I figured I would share this information and suggest if anyone wants to confirm about their bike to use this application and test it for yourself.