Wow, sure is nice to watch you guys work so hard. Only a few know how much time & money goes into restoring a vintage Whizzer. Although I have built hundreds of motors & restored at least 50 motorbikes, each one is different. Each motor has this or that part replaced and often tells the story of the motorbike. As an example I recently rebuilt a motor for one of the Whizzer decedents [Ken Goldman] and as always little details help prove the history of the motor. The motorbike was from Germany, and during the rebuild I noticed several changes in bolt sizes & threads. First I noticed the bottom & front mounting studs had course threads, and the bolts holding the exhaust elbow on the cylinder were larger than 10-24. Guess when you strip a bolt, nut or stud in Germany it would be normal to convert to metric bolts, nuts or studs. The front & bottom motor mount studs were 8 MM, and the exhaust elbow bolts were now 6 MM.
Normally I would have replaced any defective studs, nuts or bolts, however this time it was important to keep the metric conversions as it was proof the motor spent it's youth in Germany.
Another example of the differences are two of the motors I reworked for Chris recently, one runs smoother and quieter than the other. Although both motors are very similar, it is normal for them to run differently. One thing for sure is his next motor will run much different that his current inventory as he want me to "warm it up" a little [you know, camshaft, milled & reworked head, porting, etc.].
I will try to document his latest motor build so many can see the vast amount of work needed to put another Whizzer back on the raod.
Have fun,