I did message the seller but he didn't bother replying so will pass on that. Another alibaba box-shifter I guess.
OP glad you have sorted it, camchain tensioner a lot easier than doing a primary clutch. The tensioner springs were uprated by a later part number, so a clean, lube and rebuild with new springs is another option.
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces