Club 80-90 Forums

First run out since lockdown and speedo , though steady , no wobble, is reading way below and above compared to GPS on the phone.
It is on my 89 Westy with a 100MPH speedo, wondered if they can be repaired as they are so hard to find these days.
Any suggestions welcome.
Cheers , thanks in advance,

T3 Speedos can be refurbed.