The "ninja 600r" started out as the ZX600A, somewhere like 1985 or something. Your 88 is either an A or a B I think. Then you had the zx600C, ZX600D, and ZX600E/F, they were known as GPZ600s in europe. The ZX600G was in 1998, they kept making the ZX600E though until 2001, then in 2001 they started calling it the ZZR-600. 2000-2002 were the ZX600J/H models, then they came out with the 636 (ZX6R) and the race legal ZX6RR in 03 and the old ZX600J was given the ZZR-600 moniker previously held by the ZX600E.
Confused yet?
