Can't see the matting surface on your photos.
With a sharpie pen, paint all conical axle surface. Put flywheel on place hold it while you spin the motor.
Paint should be removed / scrached on entirely surface showing good contact.
If not, use some abrasive paste (car popet valve grinding paste) or improvise with small sandpaper betweed both surfaces.
Turn virabrequim while hold flywheel untill you have good contact patern.