When I first encountered this mod years ago over at a Ranger board, it originally had the method Todd suggested to see if you needed the slack taken out to begin with. At WOT the throttle butterfly should be 90° to the intake flow, allowing maximum airflow, and maximum fuel. If, over the years, the cable has stretched, the butterfly will not open the full amount, in which case the slack needs to be taken out to achieve full performance potential. As this 'mod' has circulated around and been posted and reposted many, many times, the butterfly bit has been overlooked as if it's not important. If the butterfly opens all the way already, removing the 'slack' just puts extra stress on the cable and components. Luckily, the way the throttle is set-up in the ST, if there is a failure you will lose all throttle input, and not default to WOT.