What are the original sprockets and chain for a 1981 csr650?

Hi, I want to know what was the original settings for a 1981 csr650. I know that came with a 530 chain but what was the length? What were the sprockets size?
Thanks

Howdy.  The 1981 KZ650-CSR came stock with a 630 chain & sprockets.  630x84. 13T Fr sprocket. 33T Rr.  33/13 = 2.54
I would go with a 530 chain & sprockets.  Use the largest Fr that will fit. probably either a 16T or 17T.  For comparison:  40/16 = 2.50
To see what sprockets are available:  at JT Sprockets I guess choose the KZ650C as it came stock w a 530 chain.
There are other sources, but JT would be a start. Z1Enterprises.com carries them.

See the rear wheel & transmission diagrams for the stock chain & sprockets.
www.partzilla.com/catalog/kawasaki/motorcycle/1981/csr-kz650-h1