This is a set of injection-plastic detail parts for use with car models.
From the manufacturer:
The BMW R90 S was one of the motorcycle icons of the 1970s par excellence. When it came on the market in 1973 it was one of the fastest series production motorcycles of its time and the top-of-the-range model of the "/6" type series made by the Bavarian motorcycle manufacturer.
With this package, you can enjoy a transparent functional model of the two-cylinder flat engine of the legendary BMW R 90 S which fascinates its numerous fans worldwide to this day. A special highlight of the model kit is its true-to-detail five-speed gearbox. Fun technology for you and your whole family!
The high-quality manual offers lots of both fun and knowledge. Learn about the history of BMW motorcycles and understand the successful concept of the flat-twin engine. Numerous illustrations provide a deep insight into the fscinating world of the BMW "superbike" R 90 S.
With the help of the detailed step-by-step construction manual you can build your own flat-twin engine, either for your workshop or your living room. Show the world that there is an engineer inside you waiting to come out!