Pee-wee's Big Adventure
the black bike next to the red one. Harley-Davidson...looks old FL, but chopper
BMW K 100? Classic Twin Boxer! no K just R
Yes it's a 1981 or 1982 R100RT ( Brembo breaks)
the bike on the far right
Harley-Davidson...chopper ('66- Shovel-Head engine)
the red bike. wasn't sure if it should be 1star or 2 since he bumps into it and knocks it down. Harley-Davidson...may be based on XLH Sportster (1974-)  I'll go for it. if there are mistake, please change.
Yamaha XS650 Special (1978-) http://w1.bikepics.com/pics/2005/12/16/bikepics-484137-full.jpg
Yamaha XT ?
Yes, XT500 (1977- by new exhaust. domestic model were keep using down-to-up muffler)