I upgraded to GSXR 600 k1-k3 calipers on my k2 Curvy SV 650s. The calipers have been stood for a while and so will need a good clean and pistons freeing off possibly. Recently had EBC pads fitted both sides around 300 miles ago.
I was going to rebuild them but don't have the time unfortunately.
http://www.ebay.co.uk/itm/2917979778...84.m1555.l2649
or
eBay item number is: 291797977800
Collection welcome or can deliver through parcel company on a next day service