When I do it I remove the weights and springs. Then wrap the bare mechanism fully advanced with the two tie wraps.
Make sure the buckles of the wraps are pointed down under so the rotor goes back on. Make sure the rotor is seated correctly
back on. Th weights and springs are not reused.
You must reset the timing. 36deg BTDC.
You will need the starter brace and the interupt switch for hot restarting.
If you cannot do this get the local kid with a mini bike to show you.
its permanent if you have done it right.