The Gold Valve part number for the 1700 and for the Royal Star (The one folks use on the 1600) is the same it is
They are for 43MM Showa forks, which is Yamaha's standard for big bikes.At 205lbs. is the FRSP S3732095 the right spring part # ?
Either the S3732095 or he S3732100 will work for you. I personally like things a little on the stiffer side because I tend to ride pretty hard and rely heavily on the front brake when doing so. I have the S3732100 and feel I could even go one stiffer (I'm 200lbs.). But, the S3732095 should feel slightly less harsh during normal riding. The difference between the two would be tough to notice for the majority of riders, IMO
So, the answer to your question lies in how you usually ride I think.