The Isetta 300 engine

First off my Isetta motor #'s do not match my frame and vin #.  But they are close and I have a very hard time believing that the motor is not original to the car. So someone can chime in about this if they like.  My vin # is 493784  and engine # is 501001.   The motor seemed to be well maintained through its life and was in pretty good shape.  The gear box on the other hand lived a rough life and I found a complete replacement for it.   We had CycleWorks in Kansas rebuild the crank with a steel conrod.  They also did a valve job and rebuilt the head for us.   The cylinder got a new oversized piston and the motor a standard rebuild.  The dynastart and electrical all seemed to work as it should with replacement of the points and condenser of coarse. The motor is up and running and sounding great.   I accidently fried my original ignition coil setting the timing. as seen in the video. Luckily I had a old 12volt Lucas motorcycle coil lying around that did the job until I get a new one.