three cylinder engine - Robuta Search

https://www.topspeed.com/biggest-three-cylinder-engine-on-a-production-motorcycle/

To no one's surprise, the biggest triple engine comes from the triple-cylinder specialist: Triumph

https://www.thedrive.com/news/44442/new-morgan-super-3-dumps-the-wood-frame-gets-ford-three-cylinder-engine

Three wheels, three cylinders, and all of the cool points in the world.