Timing washer
I dug up my old self-made timing washer. It measures: ID= 0.41" (10.35mm)
OD= 0.70" (17-18mm) approx. TH= 0.069" (1.75mm) Notch= 0.69" (1.75mm) -from ID Notes: started with a washer with correct ID and ground the OD down for points and visual clearance. Not critical, just want to be able to fit the points plate assy over the advance unit and see the rubbing blocks when rotating. The notch is for seeing the timing mark in the face of the advance cam. BTW, the mark is the line, NOT the square cutout. Make the notch with a file or dremel. What is also needed is a bolt and nut with the thread size matching the internal thread of the advance. I've missplaced my bolt, so don't have size, but you want as much thread engagement as possible.
To use: Nut onto bolt followed by the washer. Thread into unit until bottoms, or nut touches. Run nut down, spread weights out, align washer notch with timing mark and snug nut down. When you have everything aligned (per the earlier post) use a small hammer to tap the head of the bolt. Eyeball the alignment to make sure things are straight. Rotate the motor to verify. If all looks good, remove bolt and washer and replace with the holding bolt. DO NOT leave the notch washer in place, or the advance will not function. ALSO: If the motor doesn't start, but coughs or backfires, try swapping the ignition wires. I have encountered bikes that were timed out of phase, and it's easier to swap wiring than to pull out the advance. Also, They tend to wear the taper press fit each time it goes in or out. Not good.