Pete, I'm sorry Pete, but I found this page, and I'm sorry, Pete, really I am, but it's something that people should know about, and I'm REALLY sorry about all the engineering waiting to happen to the poor little Guzzino. And don't click on the Moto Rumi, no, don't!
https://www.moto.it/news/ingegno-e-fantasia-trasformare-un-motore-a-2-tempi-in-un-4-tempi.html
https://www.moto.it/news/ingegno-e-fantasia-trasformare-un-motore-a-2-tempi-in-un-4-tempi.html