Got this as an unrequested side-effect when I had my heated grips fitted! Owing to friction the throttle action now requires a positive twist in both directions!
I was told this would likely fix itself in a short while. Well, here we are, six moths in and it's still unchanged. I was a bit apprehensive to start with, but now I've got used to it, I find it presents no problem at all and the ability to let go occasionally* to flex my arthritic knuckles in cold weather is quite handy. Old age can be a bugger.
* Don't try this at home kiddies! Obviously briefly and only on the straights.