HI
I have a throttle pedal that has a tag for the cable to be linked to.
Throttle cable routes backwards.
I want to create a bell crank (not sure if this is proper term)

Want to convert the backwards pull of throttle cable, into a forward motion. At the same time want to alter the pedal movement to throttle body movement.

Will look like a catherine wheel firework.

Question.
How do get it to move freely? (at central pivot, and at either end)

I have taken some pictures, with a cardboard mock up


http://s360.photobucket.com/albums/oo44/msn_nike5/?action=view&current=P1020049.jpg

http://s360.photobucket.com/albums/oo44/msn_nike5/?action=view&current=P1020049.jpg#!oZZ3QQcurrentZZhttp%3A%2F%2Fs360.photobucket.com%2Falbums%2Fo o44%2Fmsn_nike5%2F%3Faction%3Dview%26current%3DP1020050.jpg

http://s360.photobucket.com/albums/oo44/msn_nike5/?action=view&current=P1020049.jpg#!oZZ2QQcurrentZZhttp%3A%2F%2Fs360.photobucket.com%2Falbums%2Fo o44%2Fmsn_nike5%2F%3Faction%3Dview%26current%3DP1020051.jpg

http://s360.photobucket.com/albums/oo44/msn_nike5/?action=view&current=P1020049.jpg#!oZZ1QQcurrentZZhttp%3A%2F%2Fs360.photobucket.com%2Falbums%2Fo o44%2Fmsn_nike5%2F%3Faction%3Dview%26current%3DP1020052.jpg

Think I have the theory of how to do, but unable to think how to put it in practice.