How do you set points on a 1982 harley Sportster 1000cc?

The high side of the cam needs to be at the open position of the points. Then use a paper match book to set the gap. You must loosen the points plate screws before adjusting the gap and tighten them afterwards. Don't over tighen! They can break or strip. However they must be tight. If this does not fix the problem, you may need to have the timing set by a mechanic.