Universal mechanical odometer with black background and chromed steel body. The odometer is backlit with white light and can be installed on most Japanese custom bikes. This model is also equipped with partial odometers. Very simple to install, it is equipped with a chromed bracket for fixing. Threaded fixing pin Ø 12mm. Tool diameter 60 mm. Ratio 2: 1 - K = 1,4: 1400 (speedometer cable revolutions) = 1km = 1400rpm = 60km / h. Threaded fixing pin Ø 12mm. To check the wheel ratio (K) of your motorcycle proceed as follows: Calculation of K: K = 10 X / U. X = number of turns made by the speedometer cable by turning the wheel 10 times U = wheel circumference. NB although most of the brands indicated mount instruments with this ratio, there may be some models that provide a different ratio, for this reason we always recommend that you inquire about the ratio to the wheel provided on your bike. To learn more about the compatibility of mechanical odometers click here