The CR60 was produce for the USA in 1983 and 1984. The two years were very similar except for a few changes. In '84 they put a larger carb on the engine, changed the clutch design slightly and the right side engine (clutch) cover is different. Most people don't realize this because they look the same at a glance. The '84 model also received larger front forks and a different style front number plate. The CR60 was also produced in 1985 but not sold in the USA.
BTW they were all air cooled bikes, and they were very fast in their day!
I still have an old '83 model in my garage. If I ever fine the time I plan on doing a full restoration of the little bike, just becuase it is such a cool little machine.