If it was mine I'd fabricate a sleeve with a setscrew in it, sort of like a tiny shaft collar, to tighten over the end of the cable sheath after letting it extend 1/2" or so past the bracket at the carburetor. You can fine-adjust the tension of the sheath against the cable that way.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!