Sorry to hear of your dad's passing. I have a Sachs with the 504 motor. I ordered new points and condenser without realizing there are two versions of points. I ended up with points that were too large and had to reorder. The bike would not fire with the original points and new condenser. The old points looked fine and I dressed the contacts with a file but still no spark. The new points arrived and I instantly had a hot blue spark. Excellent looking bike for the money. Keep or sell you're ahead of the curve.