Build a new exhaust sytems that replaces the worn out imitiation one. The new system should have a damper on both sides, just as the original bike had.
We build a new system out of 304 stainless steel. By changing ths position of the balance pipe, the bike gained a lot of torque in the mid range revoltions. It makes the bike a lot more fun to drive.
Custom made 304 stainless steel exhaust system.