Changing The Miles On The Speedo.

Hi COT, you don't give any details of the bike : model/year etc so it's difficult to answer will any degree of certainty, but assuming it has a digital odometer then yes, the dealer can change the reading of distance travelled using their dealer diagnostic computer.

Dealers sometimes have to do this when changing out a faulty clock and replacing with a new one, so they have to change the distance travelled on the new one to match the old speedo.

 

I’m sure they can as biglad says and I believe the true mileage is recorded in the Ecu somewhere deep, it is with cars at least.