Sounds like the cable outer is a bit short, or the inner a bit long (same effect). If any end ferrules are all in place and are fully seated in their respective locations, you might need to add another at some point to compensate for the discrepancy allowing the cable adjuster to work on the tickover, either that or if you are handy with the soldering, shorten the inner – but measure carefully first.
Mark you, I only have had ‘hands on’ with an ES125, and the new cable I got from Germany had an outer 9mm too long, preventing the throttle slide from closing at all! Did it rev!! Shortening the outer cured that one.