i'm pretty sure those have minarelli motors and come with dellorto sha carburetors.
so yes, great bikes, simple to work on, lots of available parts, and a lot of people on MA will be able to talk you through just about any repair/modification.
if it doesn't already run, make sure the motor turns, check for spark, and read up on the general functions of stuff in the wiki before you buy it. even great bike can be ruined by jackoffs and sold to the uninformed.