What gives V-twin motorcycle engines their unique sound?

Question

V-twin motorcycles go pbbbbbbbt (and have lower RPM) while higher V motorcycles go vroom just like cars.

In: 3

Answer 1

The question has been answered – It depends on cylinder size, number, offset, etc.

I also thought it is worth noting here that Harley Davidson in particular chose to keep inferior engine designs in favor of keeping the terrible sound. ‘Merica…