These shims are for fine tuning the air gap in your Bully clutch. They go between the lever plate and the drive hub. The air gap is the clearance between the friction disks. It is measured with a common feeler gauge and is stated in thousandths of an inch. When new, the Bully clutch is preset between .030� and .035�. As the friction disk wears, the air gap may increase to the wear limit of .050�. When this dimension is reached a shim located under the activator plate should be removed to restore the air gap back to the original dimension.
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