Hey Tom,
the yellow brick is a japanese Yamaha Giggle, 50cc, 4-stroke, EFI, watercooled, 2,9HP restricted, 5HP unrestricted, two unregulated catalytic converters.
The Gilera Stalker 50 2T was the only 2-stroke scooter and generally in bad shape with lots of troubles enroute. And he had to ride at the end of the group most of the time because of his bad 2-stroke smell and fumes and because he himself was a chain-smoker even when riding the bike.
The total costs of 1.200€ are about right, they also did a lot of ("forbidden") wild camping.
But this is not always so exciting, especially when it´s raining and temperatures are low. I know that from my own experience.
These trips are great fun indeed, but also can be pretty tough and exhausting from time to time. Especially in cold and bad weather.
This guy has some more nice trips posted online on his website. All of them are worth beeing explored. More breathtaking gorges and canyons and alpine routes to be seen.
Have fun!