@LJK_hunter You'll need to file the power valve down mate! There's a few guides on YouTube it's really easy to do. Definitely don't use the bike until you've taken care of the power valve as the piston could hit it once it's heated up.
I shelled out just shy of £30 recently for a brand new temp gauge for my TDR as I couldn't find one used that was for showing the temperature rather than just flicking on a light. Are you telling me that they use the exact same temp gauge?!