Old thread i know, but while i have the bike in pieces i thought i would show a few photos and a little experiment i did in reference to the OP.
even with a quick action throttle i still found that getting on the throttle met with a delay to getting any power to pull the bike out of tight corners.
![Image](http://i905.photobucket.com/albums/ac258/bmwgusr1100s/DSC04584.jpg)
I marked some positions on the throttle housing and noted that with the standard setup at the throttle body, half throttle at the grip was giving less than 1/4 throttle butterfly at the throttle body. You will see that the black plastic pulley has a flatfish shallow profile at the start then goes into a steeper curve further along. Removing the roller and adjusting the black plastic stop screw and adjusting the slack in the cable allows the pin to sit on the start of the steeper curve. Missing out the flatter first section. Result being it gives a linear action and half throttle at the grip equates to 1/2 throttle at the butterflies in the throttle body. Don't know how this will affect wear on the plastic pulley as yet. Its a solution but i,m still looking at other options.
![Image](http://i905.photobucket.com/albums/ac258/bmwgusr1100s/DSC04581.jpg)
[URL=http://s905.photobucket.com/user/bmwgusr1100s/media/DSC04582.jpg
![Image](http://i905.photobucket.com/albums/ac258/bmwgusr1100s/DSC04580.jpg)
You can see that the pin sits closer to the start of the curve in this pick. With the roller fitted and as standard it is sat further back on the flatter portion of the black pulley.
gus