New to the forum, and was looking for info on what years to buy/avoid/etc. I suspect there isn't a bad year per se, but I am looking at possibly buying a 93 with some maintenance records.
Anyway, to the point of an earlier question about the Kawasaki designations, I have been around Kawasaki's for about 30 years. My first bike was am MC1M90, have owned and ridden a KE100, KZ 900, KZ750 Spectre, KX 125/250/400 played with KZ 1000's and 1300's etc. There was a trend in the late 70's to "standardize" with the "K" as the make, and type was second "E" was two-stroke dual purpose, Z 4-stroke, H two stroke street, X motocross/twostroke, T trials, and L came out as 4 stroke dual purpose. The original (IIRC) was the KL250 followed by the KL 600 and later the KLR 650. I worked at a Kawasaki shop for a while (got to assemble all the bikes when they came in) and hung out for years after that and the un-official word was the R was used as the "Factory Repli-racer". The Z1R-TC was one such. In this case, "R" was the Race designation for the Paris-Dakar replica bikes. By the same token, the X was off-road race, and the KLX is not nearly as road ready as the KLR.
Dunno if it is true or not about the "R", but the others are from observation.