Best chain in what way?
Stock chain size is 630
GSXR750 520 conversion sprockets are available, and according to my research the GSXR front sprocket should fit on the KZ750, don't know about the rear because I'm using a GSX rear wheel on my 750E.
530 conversion is easy and can be done using stock KZ sprockets (contact Z1 Enterprises for parts and info).
630 chain is heavy, expensive, and not available in the X-ring series of chains (that I've ever seen anyway).
KD9JUR
