The click you heard was probably nothing , it probably came from elsewhere on the drivetrain as you move the spur , but maybe the mesh might be too tight.
As for adjusting the 2-speed , the shoe would not move with the spur all the item , that would defeat the purpose of a clutch.
So you will have to line them up each time you want to adjust it.
Adjustment is more or less the same between all brands , some use two shoe spring type clutches and others the cheaper "trigger variety". On the engine side there is the more complex centrifugal or centax clutch. Always refer to your instructions for setting information.