Even when I adjusted both ends of my throttle cable there was still a bit of slack, plus when I adjusted out the carb end all the way it put too tight a bend in the cable which caused a bit of resistance, so I ended up shortening the cable to fit better.
Shortening a throttle cable is pretty easy, all you need is a soldering iron, some solder and some thin single strand wire (like phone wire). First decide how much you need to shorten the inner cable, then remove the cable from the slide to reveal the small ball end. Then mark the location you want the new ball end to be, then wrap the wire around the new location a few times and solder it in place leaving a ball of solder about the size of the original ball end. You can use heat or hand tools to shape and size the new ball end if needed. Then just cut off the old ball end and your done....
