This is a paper craft of an old school bike with single cylinder engine. Its name is caferacer.
A single-cylinder engine is a piston engine with one cylinder. They are often used for motorcycles, motor scooters, go-karts, all-terrain vehicles, radio-controlled vehicles, portable tools and garden machinery (such as lawnmowers, cultivators, and string trimmers).
Caferacer here is a 1/12th scale which means if you build it , it can be ridden by your figma or figurine because it’s the supported scale.
This is a free paper craft published by a Japanese paper crafter nickname Chima. You may download it at the link below after registering on their site.