BMW R1200RT Police Episode: 10.22
Piaggio Vespa Episode: 12.05
Harley-Davidson unknown Episode: 3.14
Generic Harley Davidson? Agreed, although having visible rear suspension, it has to be an FX type - maybe a Fat Bob? nzcarnerd has a point, visible shocks means it's not a Softail, but the fat forks, fat and low front fender, and tri-light setup suggest FL-series. Absence of a fairing suggests Electra-Glide Sport or Road King, with saddlebags removed.
Piaggio Vespa Episode: 3.20
Cliche Bingo has opened a new branch in Spain ..... oops Italy.
Harley-Davidson XLH883 Sportster Episode: 5.02
I believe this is from the episode when Peter watches the videotape of Mannequin- /vehicle_60014-Harley-Davidson-XLH-Sportster-883.html
BMW R75 Episode: 7.03
BMW R75 with the sidecar on the other side. You can see easily because the front fork, wheels and sidecar transmission.