I guess "Throttle slower than most other Valks to return to idle" would be a longer but better title.

My throttle does return to idle with no true "sticking" but as Chris and Ricky have pointed out, it needs lubrication to avoid a failure in the future. OK, I will agree to that. Now the question; is there a way to have positive spring closure of the throttle and yet not have to hold so much pressure while riding? I have a rebuilt right shoulder that gives me fits on a long ride some times.
I have a "Cramp Buster" on my Magna and it works well, but I seldom ride it as far at one setting as I do the Valk.
I have never owned a Harley that was new enough to use throttle return springs. Just the weight of your hand on the grip will hold the old Pan Head where you want it.

I think I see lubricated throttle cables and a cruise control in my future.
