MZ/MuZ Riders

hi all,
new to your forum as just bought an ES150/1 1971

I seem to have a twistgrip problem whereby the rotation of the twistgrip does not operate the throttle cable.

I can see the spiral inside the twistgrip and I have the little block that hooks onto the cable - am I missing something please??

by the way - I used to have ES250/2 reg XBH 702J red and black and TS150 SMG77M are they still around I wonder????

thanks for help

may have came loose in the carb or pulled the cable in toooooooo

The twistgrip parts are off the hanflebar completely, if i use pliers on the cable i can operate the carb fine .
Cable and carb are fine
There is something broken or missing on the twistgrip end or something not engaged correctly