Looks a fun project , Tom .
Variety is the spice of life .

Pete .

,,,I do work on other projects.  I had always wanted a pair of drive-in movie speakers just to use as stereo speakers in the garage.   I came across this one (says Simplex).  I thought I might just give it a good speaker and a long cord.  But soon it transpired into this.   

I got the Bluetooth receiver but then added the volume control with a built-in amplifier.  This project had a lot of fun intricate machine work.  Not to mention intricate soldering (15w pin soldering pencil).  It can charge off of my phone charger.  The sound is clear.  It uses a 4.8v battery pack.

The screws were very small.  M2X.4 for the switch, 2-56 to mount Bluetooth board and 4-40 screws for the speakers.  The mounting board is black plexiglass. The taps were so small that i just used my fingers to twist the taps through the plastic.

 Some of the final pieces to be plated.  After reading the manual for the Nth time I learned that the front brake adjuster had thumb wheels rather than nuts.  These are my version of those! 

The spark plug wire clamp had an 80-year-old grommet on there BUT I found some on a marine site that were a match.  So, it got a new one.

One more view of the ignition before installing the flywheel.

Lastly, showing my assembly stand.  I fired the engine on the same stand.  I used the rope starter pulley from my 1949 Firestone outboard as it bolted right on to the three center holes.  After that I was able to pull start it as with any engine.

PD.  Come to Portland. When everyone goes home we can chat under the tent again!!

I would if I could , Tom . I remember .

We'll be in Waldron until the 2nd of July . Then we can head toward Michigan . 

Pete .

I am searching for a front wheel brake hub for a 26" Simplex
Let me know what you got.
thanks
Reggie