Hey Roadkill, I've pulled a few S3 clutches and they should never be hard to pull at all.
Best check that the routing is correct, and that the new cable is lubed, and that the lever perch isn't damaged. I've seen a Harley where the lever perch had been crimped, making it impossible to pull the clutch easily. Has it been over on the left side? If that all checks out, then perhaps make sure the internals of the clutch are adjusted properly, has that side cover ever been off?
I haven't the manual here at work, but if you need it I can probably scan the right pages for you.
Mick