if u go into "speedo" then "calibration" u should be able to change the "VSS pulses per" what ever percentage your speedo is out change that number by that same percentage, if u need to increase your speed reading then lower the number or if u need to decrease it then increase that number, the "gear ratio and tyre size" might have to be changed by the same amount so it all stays in sink if it dosnt work or has faults then make sure they are both changed
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