Rhino and Mikuni carb

[jrs]

I swithched my carb for a mikuni unit I wanted adjustability. It is the carb that had been promoted on this site to be a good replacement I belive its a vm 26. My problem is when I start her up the engine is racing and after looking into it I discovered the throttle cable that extends out past the sheathing is too short for the slide to sit all the way down. I confirmed this by installing slide and cap without the cable and it idled fine. My preliminary measurements seems to be the cable needs to extend out another 1/4 inch. Has anyone ran into this issue before and b if so what was the fix. Can I remove the brass nipple at the end cut some sheathing off and reattach. Sorry if this is basic stuff but this is all new to me I have wrenched on cars for years but this is my first atv. Thanks