While engine swaps are common in project cars and tuners, motorcycle engine swaps are way less common because they require a lot of planning beforehand.

Between the immense cost of R&D and the added complexity and expense of production, you’ll find that most motorcycle brands tend to field one or two engine configurations (i.e., V-twin, inline-four, ...

Take a look at Honda's legendary four-cylinder engine that reset motorcycle performance, pricing, refinement, and engineering.