That’s are correct and fair enough re the bushes mate.
However regarding the labels this is becoming a bigger discussion ha ha. I assume you are referring to the following extracts
I am not 100% convinced he is correct with his dates. The change from upper case to lower case took place in 1979 which can be seen in the B3 to B4 model changes. I cannot see Kawasaki still making and supplying these bushes 5 years after production was ceased. Again maybe I’m wrong with that.