You need new points.
Your magneto is an IHC model H4.
To get to the points. Remove the cap and the rotor. Then remove the THREE 10-32 screws and remove the front aluminum cover off the magneto. The points are behind the front aluminum cover.
DO NOT remove the two small 8-32 screws. The rotor drive gears are behind the small round steel cover.
The condenser is under the top cover in front of the coil.