Motorcycle Questions? Ask a Mechanic.
push the button on the speedo. that should toggle the mileage reading between total and trip.
if not, and based on what you posted, your display has failed.
if you replace the speedo, HD will NOT set the new unit to the mileage on the old one and will report to the DMV you have changed the speedo and the mileage is not correct.
let me know if you need more help.
if not, please leave a POSITIVE RATING.