Don’t worry.
I’ve got an imported bike and all I’ve got is stickers on the speedo glass marking 20,30,50,60,70 and 100mph (I find the 100mph is the most useful). I’ve never had an issue with an MOT.
The other option is to buy either a mechanical:
https://www.motorcycle-accessories-shop.co.uk/KILOMETRE_CONVERTER_149.html
or electrical:
https://www.motorcycle-accessories-shop.co.uk/KILOMETRE_CONVERTOR_148.html
convertor for the speedo.
hope this helps
Katana
