Here's my progress on the Ape so far:
Pulled the engine last night. The piston was seized but after soaking it with some penetrating oil for the last week and some "persuasion" with a washer, 20 mm socket and a hammer, I was able to move it down enough to remove the cylinder. The piston and rings are totally fine! Weird. Seems to be a modern piston too. Unfortunately, the crankshaft seems to be the problem. I'm getting slight movement in the crank so i will be investigating into it more once I split the cases this weekend.
When taking out the engine on the Ape, I noticed two things. First, someone got creative when this was last "restored" and they welded and fabricated their own motor mount. It works so that's fine.
Second, some of the parts on the cool fan side of the engine have bajaj parts, just the shifter from what I've found so far. The VIN on the clutch side matches a 1953 Piaggio Ape so I'm guessing that the original motor was missing some parts that were filled in with Bajaj stuff. I have another Ape (1957) parked behind this one with a perfectly good motor. I'll probably pull some parts off of that to make this one complete.
I was also able to track down the shop that did the previous "restoration". Turns out I was right on the second Ape frame. The original plan--back in 2015--was to elongate the green Ape and put a modern 300 GTS motor in it. Once it was disassembled and the frame elongated, the previous owner passed away and the project stopped. I plan to finish what they started! It's still a bummer that a perfectly good handlebar Ape was modified...but, I'll make the most out of it.
As far as the Isetta is concerned, I'll be posting it on the usual sites in the next coming weeks for 10k. I like all you MV guys so if you are really interested, send me a PM and we can discuss a lower price. Heck, make me some cash + Vespa trade offer!