I'm looking for a conrod assembly to suit an 83/84 KX 500. Both Vesrah and Pro-X list a rod kit that will fit 1983-2004. Though if you cross reference a 2004 conrod through Kawasaki it only suits as far back as 1992. Correct me if I'm wrong but how can an aftermarket rod suit such a large range of year models when clearly according to Kawasaki there is a difference in cranks. Looking for some verification from anyone who has used an aftermarket conrod.