Do you have the right cable fitted?
Aren't they different? Do you have an SE cable on an R, or vice-versa?
I have the same thing a little tiny, tiny bit on my R, even when I get the clutch just right. Not enough to stall, but you can just sense it dragging in gear slightly.
I read somewhere that R clutch cables are different to SE/P and I can't find the article. My cable outer is red if it makes a difference. Never know with Honda.

Chris