The weak link is the magneto coil, the internal wire insulation breaks down with age, the last BMW with magneto ignition was made in 1969, so the coil is likely 50+ years old. with your new coil, condenser and good points, you will have a great system for the years to come. Use new wires and plugs also. I have had several new bad condensers over the years, so keep a spare handy. Once you get the hang of any magneto equipped BMW, you will ride it for the rest of your life. Bought my first one in 1976, still have it. Have fun!!