This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This custom bike was built in 2013 and is heavily based around parts pulled off an old Citroen 2CV, including its air-cooled boxer twin, fenders and more. The seller says they’ve added 10k kilometers since completion, and though not the prettiest looking car-engined custom out there, it’s certainly pretty interesting. Find it here on eBay in Slovenska Bistrica, Slovenia with an $11k USD BIN. Special thanks to BaT reader Philip K. for this submission.
Reads the listing in its entirety: “All parts of the motorcycle from Citroen 2CV. Military colors and excellent transmission, electronic ignition, reverse, mono front fork, brakes front drum, back double drum and disc brakes. Driven three years and crossed 10,000 km.” Check out the fenders–each one appears to have been made from two halves of the donor car’s fenders at respective ends.
In at least one way, a 2CV-based motorcycle makes a lot of sense, as visionary lead engineer André Lefebvre is believed to have based the car’s boxer twin around existing BMW designs. This one’s a later 602cc unit, meaning just under 30 HP and a 4-speed gearbox.