Honda 125 racing 2 strokes

 I'm only cross-posting this here because I don't seem to get any answers
from other (more appropriate?) groups.

Help

For Aussie, Period 5 historic racing,  1980 bikes are eligible.
I thought 1980 Honda RS125 racers were based on CR125 of the same year
but it seems according to
http://www.motorhelmets.com/htm-service/resources-motorcycle-articles-honda-history.htm  

the  "The first Pro-Link, liquid-cooled motocrossers appeared in 1981."

Does anyone know where I might find detail model information/specs on
(1980 model) RS125 & CR125 Hondas or the history of Honda water-cooled
2-strokes?

Bernie

   Was a while ago....
  79 was the CR's with 23" wheel, so '80 was red aircooled
  I believe, but once again, a while ago, '82 was first watercooled
year.  Was for KX.