care3ful with the grease....if you put too much on it will cause the throttle to kinda stick to the bars. I finally cleaned all mine off and left it dry to get it to spin.....but it's still alittle slow on return like you're talkin about.

like bull and 700 said, it's GOTTA be in the housing where the cable sits.....

maybe make a spacer to go between the halves to hold htem apart slightly?????