it seems that the text in the PDF is selectable.. then you can put into Google translate.. (not perfect, but get the general gist)
"Exhaust system (1)
The new CB1000R exhaust system offers performance as well as performance as functional components contributing to the evolution of output characteristics.
The weight reduction that contributes to the improvement, the sound that invites the rider's uplifting feeling, and the high-grade appearance that suits the adult's taste
It has been renewed.
The exhaust system has a construction in which a chamber is provided behind the exhaust pipe assembly in addition to the muffler.
By making changes, deep bank angle is secured and mass concentration is achieved, and both the maximum output and the low / mid speed range torque are improved.
It greatly contributes.
In the structure of the muffler, two tail pipes are arranged vertically. This ensures high opening times by securing the required opening area.
Both the improvement of the transition area and securing of the bank angle are compatible. The interior of the silencer has a simple two-room structure
We achieved weight reduction and achieved high noise reduction performance by using punching metal effectively. Also, muff
By making small holes at the lower end of the tail pipe at three points inside
In addition, in the middle and high revolution region, we secure the “dropout” that opens to the atmosphere without going through the expansion chamber, and let it feel like a straight four-cylinder upswing
Creates an uplifting sensation for the riders through exciting highs."