Miles, You are correct, Jay Leno makes a reference to that 250cc motorcycle on the video.
The CBX1000 was the first 6 cylinder bike that I laid eyes on, I'll never forget that day, I said WOW that thing is wide and BIG. The owner at the time was smiling and laughing while I drooled over his CBX. I want one. Today a clean low mileage 1979 CBX will cost around $13,000 - $16,000. The 79's were the best units, in 1980 (Thanks to Jimmy Carter) the CBX's were detuned and had the speedometer replaced with one that only read up to 80mph.