I do not use the shim behind the flywheel. Some time ago, fore some reasson i used a lot of front enginebearings. Shim got cone somehow and damaged the front seal on the bearing. Was not the mugen clutch, but i still do not use the shim
Agree... The large mugen shim can do this
Behind flywheel, use shims that are same OD as inner race of front engine bearing. Shims behind flywheel are needed on mbx7 to center clutch bell to center diff gear.