I think both are close. If this were my BS34s then closing the mixture screw 1/8 turn on the Right and 1/4 to 3/8 turn on the Left would probably bring them right. But my concern is that leak on the Right as it is an unknown. A pitty that there is not simple fix for the leaking bush.
If you are stuck with the leak due to carburetor design then assume it is linear over the rev range and leave the Right set as it is now. Concentrate on the left and see if decreasing the mixture screw or pilot jet solves the issue.
I hope you get there soon.