Judging from the wording of your question, you are trying to determine how to dynamically balance the mechanism to 6.3 grams force at 8000 rpm.
I don't believe Solid Edge Simulation will do that for you.
what you can do is determine the location of the center of mass of the rotating components with regard to the axis of rotation as Rick described.
once you know that and the mass of the rotating components, you can calculate the dynamic (shaking) force of the system by hand or by entering the equations into a spreadsheet.
The equations for those calculations are not very complicated and are published in Machinery's Handbook along with free body diagrams and an explanation of how to use the equations.
not a single button click, but not too hard to do. just too much explanation to publish here.
If you are a designer or design engineer in the U.S., you should have a copy of that handbook. if you don't have one, get one. it will be the best spent $100.00 or so you will ever spend.