We tested over and over to achieve enough power which is required for small exhaust amount vehicle.
Our answer is using specific coil shaped exhaust pipe. This exhaust pipe makes ideal exhaust pulsation and rings smooth acceleration.

R-77S reduces approximately 40% of weight compared to the stock exhaust system.
Also, it gives sporty riding as the pipe comes in the center of mass of the vehicle.

R-77S makes gentle and low pitch sound.

A part of manufacturing of this product is done by Yoshimura Asia.