Just a headsup for the few people here I know who've enjoyed those motorbike games in the past:
Yesterday's 2019 release of Milestone's MotoGP series is maybe the best they ever made. It's really good visually, it's mostly bugfree (and no serious ones), it has a nice and wide variety of content (including historic bikes, riders and tracks), it has a new "neural" supposedly self-learning AI which actually works kinda cool.
I'd say just like the Codemaster F1 series this is a very accessible racing title that does provide enough of a challenge for more serious players, and it works well with a gamepad so you don't need to invest in a wheel setup.
The 2008 version of this game was my entry level drug into more serious racing simulations, and for anyone interested in such this might be the new way to get hooked.