Here ya go another very good site with many good and varied routes to download ranging from 50mile to 3000mile, from all over Europe, Enjoy. And a merry Xmas to all.
https://www.routeyou.com/en-fr/route/search/3/motorcycle-and-car-route-search/motorcycle-route
https://www.routeyou.com/en-fr/route/search/3/motorcycle-and-car-route-search/motorcycle-route