Yamaha XTZ750 Super Ténéré Episode: 1.00
XTZ 750 Super Tenere
MV Agusta 850 SS Episode: 1.01
MV Agusta - maybe one of the last of the old ones from the late 1970s? This is a racing version http://www.motosolvang.com/images_new/large/1977_MV_850SS.jpg but it is very similar in details - like the shape of the fairing, the style of wheels and brakes etc.
This is the MV Agusta 850 SS model.
Ducati 851 Episode: 1.01
Ducati 888 or 851
Yamaha XTZ750 Super Ténéré Episode: 1.02
750 Super-Ténéré, la Yamaha...
Kawasaki ZR750C Zephyr Episode: 1.04
Zephyr 750 (the same one: /vehicle.php?id=236803)
From Ep. 1.05:
Husqvarna WR250 Episode: 1.05
Most probably the same bike of Ep. 6.04 thumbs: /vehicle_167714-Husqvarna-WR-250-1995.html
Husqvarna TE 610, at that time Husqvarna didn't produce 250cc 4 stroke engine.