Kawasaki recently revamped the KLX-140 line up of trail bikes, and now Yoshimura has a full system for all three wheel sizes of the mean green trail machine 140, 140L and 140G. This new RS-9 Enduro Series full system not only increases the power, and torque, it reduces weight over the stock system. Unmistakable is the one of a kind look of the RS-9, add to that the legendary Yoshimura exhaust note and it's over! A laser-cut heat shield and a U.S.F.S. Approved Forest Service spark arrestor is included with this system. Parallelogram-shaped muffler. Increased muffler volume over stock system, resulting in better throttle response and improved noise cancellation. Lightweight muffler construction with carbon fiber end-cap. Reduced weight over O.E.M. system: Yoshimura Full System weight 5.6 pounds vs. stock system weight 6.7 pounds. Stainless steel header and tail-pipe.