I know this is an old post but it was what I used as a starting point when I upgraded my throttle bell crank to the brass bushings.
Problem is alleviated by removing shaft that the throttle bell crank rotates on. This will also allow you to remove the bell crank that is blocked from a simple slide-off by the control arm. The shaft in question:
I have seen some posts recommending the use of a vise grip to remove this component. I found that an 8mm wrench at the cotter pin end will suffice and not tear up the shaft like you can see has happened to mine (silly PO!).
I did also have to chase the crank insides to fit the brass bushings in. This may not be necessary with the plastic part. Used a dremel grinding bit.
Then tapped them in...
I then reconnected the bell crank to the engine side throttle linkage and put crank, bushings and shaft on as a unit. No issues of blockage.
A little grease and a cotter pin and now the pedal feels like a dream!
