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I've posted this inside two threads now where people were asking. So maybe this will help some other folks out. This is about a half hour worth of work and you should have a strong google-fu since this isn't a step by step guide, just "this is available" for you.
If you have an Amazon Fire TV or Fire stick, search YouTube on how to jailbreak your device. This takes about 10 minutes, a smartphone and an internet connection. If you aren't able to do it easily, include "2017" in your search, as sometimes they update security settings and fix loopholes for side loading. Next thing to do is install Kodi. Kodi is an app that accesses free online content, basically any movie or series that's ever been on TV is available on Kodi if you put in the legwork. Kodi is kind of like file system browser, so it's mostly intuitive but will take a little getting used to.
Once you have Kodi, the Add On you want is called Motor Replays. Motor Replays has all major bike races plus WRC, some trophy trucks and lots of cool shit.
This is the written guide to install Motor Replay
Guide Install Motor Replays Kodi Addon Repo - New Repo - Best for Kodi
So, Amazon fire TV/ stick> jailbreak> Kodi> Motor replays = lots of motor racing any time you want to watch it.