When Woody starts bumping into the other cars, this cop turns up on this bike, with the siren on. Unfortunately the view of the bike as it ride up is blocked by the cars.
The station wagon is a '76 Chevrolet Impala. On the other picture, the red sedan is a '76 Chevrolet Caprice Classic. The convertible is ' '76 Cadillac Eldorado.
By the wind-shield & mirror, I guess it looks more like Harley.
Pre '80 Kawasaki's wind-shield were a bit edged shape & mirror stay were longer.
There's no possibilities of Moto Guzzi. Vending angle of steering pipe dosen't match.