Have you recently greased the suspension? Could it be excess grease on the speedo sensor, or a loose sensor. If it is the same as my plus4 it is on the offside (UK).
Just a thought.
I had this when my kingpins were changed.
Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016
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