I recently interviewed Ultan Guilfoyle about the Art of the Motorcycle exhibit, and he recounted this gem about the famous sculpting duo:
“One day I got a call from Jean-Claude, ‘Is this the Walton Gulfooly fellow?’
Yes, I said.
‘This is Jean-Claude, I hear you are having an exhibit of motorcycles. We have a Vespa.’
Very interesting: what year is it?
‘1958’
Fantastic, that’s a really early one. Where is it, and what color is it?
‘I don’t know what color. It’s in my living room, come look at it.’
So I stopped by their studio in NYC, and their assistant let me in: the Vespa was covered in cloth! I asked the assistant if I could peek in – I was trying to sort what color! Of course she said no. I spoke to Jeanne-Claude on the phone while I was there, and suggested we needed to unwrap their Vespa for the exhibit.
‘How dare you! You insult the history of our work! This is a very important piece!’
She called Thomas Krens, the director of the Guggenheim, who punted and said ‘anything Ultan wants to do is okay’. Jeanne-Claude called back, and I repeated that we’d love to have their Vespa, but we’d have to unwrap it.
‘You are an outrage!’ and she slammed down the phone.
The Guggenheim was thinking about doing an exhibit of their work, and I next saw them during their Central Park exhibit, the gates, and introduced myself. Jeanne-Claude said, ‘You’re not that motorcycle guy are you! You’re a disgrace!”
But Christo said, ‘I loved that exhibit!’ ”

Funny footnote to this article: the bike is definitely not a Vespa, but a 1950s Lambretta LD.
How can you tell just what it is ?
Speed, if you know scooters then you can tell from the shape. 😉
Going on certain characteristics of the model used, I’d guess either very early LD or possibly an earlier LC, with an outside chance of it being a later French built Lambretta LD if Christo produced this work back in his late wife’s native France.
Wow! This is like playing pass-the-parcel at a birthday party in my childhood!!