This is an original design from Atelier Fare called the VP-P, and described as "a twin V-type rotary engine with electron controlling hub-center steering". No scale is given, but the instructions text in Japanese conclude with the comment that the finished model is approximately 270mm long.
Altier Fare's futuristic Police Motorcycle Papercraft is now available for download. There are 12 pages of parts. You may want to follow the instruction given.
[ Download Here ]