Vintage Cipolla buggy engine 3.5, sadly no carb,  has compression, spare conrod as shown in pictures, Im an engineer by trade so I have stripped down carefully and added oil on reassembly. I have now found the carb holder plus nut that goes on the end of it. The carb to suit would be 11.5mm diameter and 8.5mm deep (this is the bit that fits in the hole of the engine.

Info for the engine is here https://www.overrc.com/vintage/documentation/archives-de-mike/Cipolla%2035%20Buggy.pdf

If you are a overseas buyer I can work out shipping costs, tracked and signed for, any questions please ask.