like the stock japan Z gauge, dosent that only go up to something like 220KM? Therefore, if the gearing is differant (say the scale of the gauge is only 140MPH), and he replaced the face with a face from a gauge with a 220MPH scale, then it would appear like he's going twice as fast. Take note that I am pulling all of this outta my ass (nothing is factual), and havent slept in 2 days.