Hmmmm ..... i thing, that i take this idea for the Airflod system ....  

Tried also with the P901System and Keihin carburetors, was only moderate success. Have letzes years many experiments trying to improve the inadequate processing of P901, changed the nozzles of the Keihin carburetor several times, but did not receive an improvement.
From my experience, I must say, the whole systen of the mainfold is not so good, the system of KJS is mature and in this form I also see the solution, be two equal lengths of pipe with a diameter of 38mm (1.5 inch) better can.