No spark could be caused by a few different things. The first thing that I would check on the 200 is the pulse generator/rotor air gap. The 200 had the pulse generator and rotor at the end of the cam, on the side of the head, behind a round metal cover. I would check to make sure the rotor and pulse generator are clean and free of any rust. Then I would make sure the air gap is correct. If it's not correct, you won't have spark.
If that's not the problem, it could be the ignition coil, CDI, pulse generator, or stator. I would recommend getting a repair manual, if you don't already have one, to get the specs. for testing the components.
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!
You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.