Hello from north Spain.
In picos all the routes are amazing, you.ll enjoy alot.
Good route from Picos to Murcia. That´s the best option. Probably hot last days.
I live in the north of Spain and ride a lot in France. No high viz vest, no helmet stickers, never had a problem with french gerdarmerie. Just don´t speed too much.
I think breathanalysers are not in force any more.
Best rides in France in Pirinees.
North to south by west coast flat and boring, except if it´s summer and you stop in the splendid beaches.
Good luck
I have had 3 FJR in the past and now I own a VFR. I haven´t been so lucky as you because I couldn´t keep the FJR.
Both are very good bikes, some differences in wind protection but you will ride many km in both of them.