Seems you need a friend with a bike that had the mastermind tcu from new. You buy a new mastermind tcu. Fit it to your friends bike. The bike goes into limp mode. You then take it to a specialized dealer who will activate it to clear the problem.
Get home and fit newly activated tcu to your...
Does the gen3 donor bike get altered in any way by using it to activate the new mastermind for a gen2 bike.
A friend has kindly offered that I could use his gen3 bike but obviously i don’t want to cause any future trouble for him.