I had the XC and it was the same as the CR but had a headlight and taillight and could be registered (Mine was) it had a squeeze horn from a pushbike and total loss battery for the blinkers (from an Yam IT175 aftermarket blinkers). I used to take the light off swap the rear guard and ride MX on it.
I think the shop at Penrith were I bought them (I also had the 84 and it was the same but plastic tank) , were doing them up to be registered?
The wr's had lights and softer suspension and wider ratio gears (Even faster top speeds), They were registerable too but I dont think Penrith was dodging them to pass rego?
In 80's, If you wanted a mxer with lights you bought the XC husky, then/or the Maico or later there was Woodys CR transformations
If you wanted a Euro Enduro then you went WR.