The flash sync points ride on a cam that is activated by the shutter drum which releases the curtains. There is a lockout lever that blocks the cam on speeds 1/60th second and higher. Had a K-60 that was problematic with the flash sync, after some creative bending of the points and paying attention on how it worked was able to restore proper operation. Loosen the screw that holds the points and move in just a tad. See if this helps, if not the chassis will have to come out and a good inspection made. I can help you on this. Also belong to the Kiev Report, Steven.