I assume you are talking about assisted cycling, rather than the well-known motorsports suggested in other comments!<p>There are motor-paced cycle races [1] where cyclists get to slipstream powered vehicles - for example derney-paced races [2] and Keirin [3]<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Motor-paced_racing" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Motor-paced_racing</a>
[2] <a href="https:&#x2F;&#x2F;youtu.be&#x2F;8cvSGNiaZRI?t=29s" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;8cvSGNiaZRI?t=29s</a>
[3] <a href="https:&#x2F;&#x2F;youtu.be&#x2F;4aPBqwfj_mQ?t=1m45s" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;4aPBqwfj_mQ?t=1m45s</a>