Need help identifying 3 old family bikes

[boomerang]

Need help identifying these old bikes from family photos. The green one was purchased at Moroso's in Connecticut in 1971or 1972. Anyone know?

 

[OND]

Green is ARCO (Alexander Reynolds Co ) , Yellow is a Cat and the red one is ARCO EZ Rider

 

[OND]

Great pics , I loved the bell bottoms ! lol

 

[AboveUpNorth]

The yellow one appears to be a Cat R3200

 

[delray]

I keep looking at the two chevys in the back ground.
your about right on the years of the bikes. Tecumseh started to get real heavy on the plastic tanks for minibike in 71 and up.
cool pictures. thanks for posting them.