In the process of rebuilding a ZA50 and remember hearing some rumors of these things locking up at high speeds. Is this possible? Is it from not properly shimming? I did acquire a set of original Puch shims. Shouldn't have a problem finding the bearings, but heard a non-Puch bearing might need different shimming. Anybody have issues with having to shim differently than what is originally suggested?
And where can I find a set of new shift dampeners?